The author is: the_authornHealth Status: Transport Accident Mortality (M) 2017 and 2015 . [Compare countries including Canada and Canadian Provinces]
Dataset: from CIHI, Canada. The same information plotted with different charts. Data files are also attached. If you see any mistakes, or if you need more information, feel free to inform us
[‘Measurement units used: Age-standardized rate per 100,000 males. Heatmap might show relative comparisons; not absolute values. The primary goal of these visualizations are to compare. If units are not provided, interpret them as relative values’]
These are outputs from a small Python based tool developed on 2019. The tool can generate many more of such plots easily, and will work with data for other purposeSayed Ahmed
Linkedin: https://ca.linkedin.com/in/sayedjustetc
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csv_data_file_for_2017_for indicator_Transport_Accident_Mortality_(M)for_plot_heatmap_across_indicators csv_data_file_for_2017_for indicator_Transport_Accident_Mortality(M)for_plot_measure_by_years csv_data_file_for_2017_for indicator_Transport_Accident_Mortality(M)forplot_map_measure_by_regions csv_data_file_for_2017_for indicator_Transport_Accident_Mortality(M)_forplot_measure_by_regions

csv_data_file_for_2015_for indicator_Transport_Accident_Mortality_(M)for_plot_heatmap_across_indicators csv_data_file_for_2015_for indicator_Transport_Accident_Mortality(M)for_plot_measure_by_years csv_data_file_for_2015_for indicator_Transport_Accident_Mortality(M)forplot_map_measure_by_regions csv_data_file_for_2015_for indicator_Transport_Accident_Mortality(M)_forplot_measure_by_regions
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Post Data:2021-01-24 21:19:39

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The author is: the_authornRHCE: MariaDB Administration on Redhat/Fedora/CentOS
Check if mariaDB is installed or not
130 yum list installed | grep ^mariadb
mariaDB originated from MySQL – after MySQL Got Bought by Oracle
133 yum list installed | grep ^mariadb
I see – installed though not completely
Output:
mariadb-libs.x86_64 1:5.5.52-1.el7 @anaconda
There are two other components: mariaDB – client component. MariaDB-server: Server Component
The MariaDB packages:
138 mariadb-bench.x86_64 mariadb-devel.x86_64 mariadb-server.x86_64 mariadb-test.x86_64 mariadb.x86_64
Install all packages at once
139 yum install mariadb*
140 yum list installed | grep ^mariadb
Now, I see the following, after I have installed – all MariaDB packages available in my system
mariadb.x86_64 1:5.5.52-1.el7 @local
mariadb-bench.x86_64 1:5.5.52-1.el7 @local
mariadb-devel.x86_64 1:5.5.52-1.el7 @local
mariadb-libs.x86_64 1:5.5.52-1.el7 @anaconda
mariadb-server.x86_64 1:5.5.52-1.el7 @local
mariadb-test.x86_64 1:5.5.52-1.el7 @local
MariaDB Configuration Files
149 ls /etc/my.cnf
150 ls /etc/my.cnf.d/*
The files
/etc/my.cnf.d/client.cnf /etc/my.cnf.d/mysql-clients.cnf /etc/my.cnf.d/server.cnf
153 vim /etc/my.cnf
154 vim /etc/my.cnf.d/client.cnf
155 vim /etc/my.cnf.d/server.cnf
156 vim /etc/my.cnf.d/mysql-clients.cnf
157 main config file /etc/my.cnf
158 grep -v ^# /etc/my.cnf : will show lines that are not comments
159 grep -v ^# /etc/my.cnf
The content of my.cnf : some lines are self explanatory
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
symbolic-links=0
[mysqld_safe]
log-error=/var/log/mariadb/mariadb.log
pid-file=/var/run/mariadb/mariadb.pid
MariaDB messages are logged at: /var/log/mariadb/mariadb.log
MySQL Specific Selinux Contexts
171 ps -eZ | grep mysqld
I do not see anything as mysqld/maridb is not running
178 systemctl start mariadb.service
179 systemctl enable mariadb.service
180 ps -eZ | grep mysqld
now the output:
system_u:system_r:mysqld_safe_t:s0 4428 ? 00:00:00 mysqld_safe
system_u:system_r:mysqld_t:s0 4585 ? 00:00:00 mysqld
184 mysqld runs on it’s own domain mysqld_t
Related Selinux file type: mysql_exec_t
etc_t is for /etc/my.cnf.d
mysql_db_t is for /var/lib/mysql/
mysql_log_t is for /var/log/mariadb/
189 ll -dZ /usr/libexec/mysqld /etc/my.cnf.d /var/lib/mysql /var/log/mariadb
The output – please note the Selinux Contexts in the output
drwxr-xr-x. root root system_u:object_r:mysqld_etc_t:s0 /etc/my.cnf.d
-rwxr-xr-x. root root system_u:object_r:mysqld_exec_t:s0 /usr/libexec/mysqld
drwxr-xr-x. mysql mysql system_u:object_r:mysqld_db_t:s0 /var/lib/mysql
drwxr-x—. mysql mysql system_u:object_r:mysqld_log_t:s0 /var/log/mariadb
Corresponding Selinux Port Type: mysql_port_t
196 semanage port -l | grep mysqld
output:
mysqld_port_t tcp 1186, 3306, 63132-63164
Related Selinux Booleans: mysql_connect_any, selinuxuser_mysql_connect_enabled
200 getsebool -a | grep mysql
I see the output
mysql_connect_any –> off
selinuxuser_mysql_connect_enabled –> off
To install MariaDB-Server:
205 yum -y install mariadb-server
already installed. we installed with yum -y install mariadb* [installed everything together]
207 systemctl enable mariadb
We can run mysql_secure_installation – to secure our MariaDB installation

209 mysql_secure_installation

The Output: from mysql_secure_installation command
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB
SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!
In order to log into MariaDB to secure it, we’ll need the current
password for the root user. If you’ve just installed MariaDB, and
you haven’t set the root password yet, the password will be blank,
so you should just press enter here.
Enter current password for root (enter for none):
OK, successfully used password, moving on…
Setting the root password ensures that nobody can log into the MariaDB
root user without the proper authorisation.
Set root password? [Y/n] y
New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables..
… Success!
By default, a MariaDB installation has an anonymous user, allowing anyone
to log into MariaDB without having to have a user account created for
them. This is intended only for testing, and to make the installation
go a bit smoother. You should remove them before moving into a
production environment.
Remove anonymous users? [Y/n] y
… Success!
Normally, root should only be allowed to connect from ‘localhost’. This
ensures that someone cannot guess at the root password from the network.
Disallow root login remotely? [Y/n] y
… Success!
By default, MariaDB comes with a database named ‘test’ that anyone can
access. This is also intended only for testing, and should be removed
before moving into a production environment.
Remove test database and access to it? [Y/n] y
– Dropping test database…
… Success!
– Removing privileges on test database…
… Success!
Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.
Reload privilege tables now? [Y/n] y
… Success!
Cleaning up…
All done! If you’ve completed all of the above steps, your MariaDB

installation should now be secure.
Thanks for using MariaDB!
Enable MariaDB through Firewall and Allow traffic on Port 3306 – default mysql port
218 firewall-cmd –add-service=mysql –perm
220 firewall-cmd –reload
221 systemctl start mariadb
222 systemctl status mariadb
223 start mysql/mariadb
Run MySQL
224 mysql -u root -p
mysqldump is used to backup a database
mysql command can be used to restore a database
you can even use IDEs such as MySQL Workbench to backup and restore MySQL Databases
228 mysql -u root -p
229 mysqldump -u root -p testsayed > testsayeddb.sql
to restore – you need to use < testsayeddb.sql
231 mysql -u root -p testsayed < testsayeddb.sql
Backup and Restore MySQL Database
You can backup multiple databases at once, you can even backup some tables or other database objects using mysqldump
similarly, you can restore multiple databases at the same time using mysql command
just use multiple datbase or database object names with NO comma – one after another
235 mysqldump -u root -p DB1 DB2 DB3 > alldb.sql
when you use restore and give the sql file – if you use db name or table name before < then only that part will be restored irrespective hiow much data is there on the file
example
238 mysql -u root -p DB1 tbl1 < alldb.sql ;
you can use –all-databases or –databases with mysqldump command
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Post Data:2021-01-24 21:19:23

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The author is: the_authornRHCE: MariaDB Administration on Redhat/Fedora/CentOS
Check if mariaDB is installed or not
130 yum list installed | grep ^mariadb
mariaDB originated from MySQL – after MySQL Got Bought by Oracle
133 yum list installed | grep ^mariadb
I see – installed though not completely
Output:
mariadb-libs.x86_64 1:5.5.52-1.el7 @anaconda
There are two other components: mariaDB – client component. MariaDB-server: Server Component
The MariaDB packages:
138 mariadb-bench.x86_64 mariadb-devel.x86_64 mariadb-server.x86_64 mariadb-test.x86_64 mariadb.x86_64
Install all packages at once
139 yum install mariadb*
140 yum list installed | grep ^mariadb
Now, I see the following, after I have installed – all MariaDB packages available in my system
mariadb.x86_64 1:5.5.52-1.el7 @local
mariadb-bench.x86_64 1:5.5.52-1.el7 @local
mariadb-devel.x86_64 1:5.5.52-1.el7 @local
mariadb-libs.x86_64 1:5.5.52-1.el7 @anaconda
mariadb-server.x86_64 1:5.5.52-1.el7 @local
mariadb-test.x86_64 1:5.5.52-1.el7 @local
MariaDB Configuration Files
149 ls /etc/my.cnf
150 ls /etc/my.cnf.d/*
The files
/etc/my.cnf.d/client.cnf /etc/my.cnf.d/mysql-clients.cnf /etc/my.cnf.d/server.cnf
153 vim /etc/my.cnf
154 vim /etc/my.cnf.d/client.cnf
155 vim /etc/my.cnf.d/server.cnf
156 vim /etc/my.cnf.d/mysql-clients.cnf
157 main config file /etc/my.cnf
158 grep -v ^# /etc/my.cnf : will show lines that are not comments
159 grep -v ^# /etc/my.cnf
The content of my.cnf : some lines are self explanatory
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
symbolic-links=0
[mysqld_safe]
log-error=/var/log/mariadb/mariadb.log
pid-file=/var/run/mariadb/mariadb.pid
MariaDB messages are logged at: /var/log/mariadb/mariadb.log
MySQL Specific Selinux Contexts
171 ps -eZ | grep mysqld
I do not see anything as mysqld/maridb is not running
178 systemctl start mariadb.service
179 systemctl enable mariadb.service
180 ps -eZ | grep mysqld
now the output:
system_u:system_r:mysqld_safe_t:s0 4428 ? 00:00:00 mysqld_safe
system_u:system_r:mysqld_t:s0 4585 ? 00:00:00 mysqld
184 mysqld runs on it’s own domain mysqld_t
Related Selinux file type: mysql_exec_t
etc_t is for /etc/my.cnf.d
mysql_db_t is for /var/lib/mysql/
mysql_log_t is for /var/log/mariadb/
189 ll -dZ /usr/libexec/mysqld /etc/my.cnf.d /var/lib/mysql /var/log/mariadb
The output – please note the Selinux Contexts in the output
drwxr-xr-x. root root system_u:object_r:mysqld_etc_t:s0 /etc/my.cnf.d
-rwxr-xr-x. root root system_u:object_r:mysqld_exec_t:s0 /usr/libexec/mysqld
drwxr-xr-x. mysql mysql system_u:object_r:mysqld_db_t:s0 /var/lib/mysql
drwxr-x—. mysql mysql system_u:object_r:mysqld_log_t:s0 /var/log/mariadb
Corresponding Selinux Port Type: mysql_port_t
196 semanage port -l | grep mysqld
output:
mysqld_port_t tcp 1186, 3306, 63132-63164
Related Selinux Booleans: mysql_connect_any, selinuxuser_mysql_connect_enabled
200 getsebool -a | grep mysql
I see the output
mysql_connect_any –> off
selinuxuser_mysql_connect_enabled –> off
To install MariaDB-Server:
205 yum -y install mariadb-server
already installed. we installed with yum -y install mariadb* [installed everything together]
207 systemctl enable mariadb
We can run mysql_secure_installation – to secure our MariaDB installation

209 mysql_secure_installation

The Output: from mysql_secure_installation command
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB
SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!
In order to log into MariaDB to secure it, we’ll need the current
password for the root user. If you’ve just installed MariaDB, and
you haven’t set the root password yet, the password will be blank,
so you should just press enter here.
Enter current password for root (enter for none):
OK, successfully used password, moving on…
Setting the root password ensures that nobody can log into the MariaDB
root user without the proper authorisation.
Set root password? [Y/n] y
New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables..
… Success!
By default, a MariaDB installation has an anonymous user, allowing anyone
to log into MariaDB without having to have a user account created for
them. This is intended only for testing, and to make the installation
go a bit smoother. You should remove them before moving into a
production environment.
Remove anonymous users? [Y/n] y
… Success!
Normally, root should only be allowed to connect from ‘localhost’. This
ensures that someone cannot guess at the root password from the network.
Disallow root login remotely? [Y/n] y
… Success!
By default, MariaDB comes with a database named ‘test’ that anyone can
access. This is also intended only for testing, and should be removed
before moving into a production environment.
Remove test database and access to it? [Y/n] y
– Dropping test database…
… Success!
– Removing privileges on test database…
… Success!
Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.
Reload privilege tables now? [Y/n] y
… Success!
Cleaning up…
All done! If you’ve completed all of the above steps, your MariaDB

installation should now be secure.
Thanks for using MariaDB!
Enable MariaDB through Firewall and Allow traffic on Port 3306 – default mysql port
218 firewall-cmd –add-service=mysql –perm
220 firewall-cmd –reload
221 systemctl start mariadb
222 systemctl status mariadb
223 start mysql/mariadb
Run MySQL
224 mysql -u root -p
mysqldump is used to backup a database
mysql command can be used to restore a database
you can even use IDEs such as MySQL Workbench to backup and restore MySQL Databases
228 mysql -u root -p
229 mysqldump -u root -p testsayed > testsayeddb.sql
to restore – you need to use < testsayeddb.sql
231 mysql -u root -p testsayed < testsayeddb.sql
Backup and Restore MySQL Database
You can backup multiple databases at once, you can even backup some tables or other database objects using mysqldump
similarly, you can restore multiple databases at the same time using mysql command
just use multiple datbase or database object names with NO comma – one after another
235 mysqldump -u root -p DB1 DB2 DB3 > alldb.sql
when you use restore and give the sql file – if you use db name or table name before < then only that part will be restored irrespective hiow much data is there on the file
example
238 mysql -u root -p DB1 tbl1 < alldb.sql ;
you can use –all-databases or –databases with mysqldump command
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Post Data:2021-01-24 21:13:04

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Post Data:2021-01-24 21:10:48

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The author is: the_authornRHCE: MariaDB Administration on Redhat/Fedora/CentOS
Check if mariaDB is installed or not
130 yum list installed | grep ^mariadb
mariaDB originated from MySQL – after MySQL Got Bought by Oracle
133 yum list installed | grep ^mariadb
I see – installed though not completely
Output:
mariadb-libs.x86_64 1:5.5.52-1.el7 @anaconda
There are two other components: mariaDB – client component. MariaDB-server: Server Component
The MariaDB packages:
138 mariadb-bench.x86_64 mariadb-devel.x86_64 mariadb-server.x86_64 mariadb-test.x86_64 mariadb.x86_64
Install all packages at once
139 yum install mariadb*
140 yum list installed | grep ^mariadb
Now, I see the following, after I have installed – all MariaDB packages available in my system
mariadb.x86_64 1:5.5.52-1.el7 @local
mariadb-bench.x86_64 1:5.5.52-1.el7 @local
mariadb-devel.x86_64 1:5.5.52-1.el7 @local
mariadb-libs.x86_64 1:5.5.52-1.el7 @anaconda
mariadb-server.x86_64 1:5.5.52-1.el7 @local
mariadb-test.x86_64 1:5.5.52-1.el7 @local
MariaDB Configuration Files
149 ls /etc/my.cnf
150 ls /etc/my.cnf.d/*
The files
/etc/my.cnf.d/client.cnf /etc/my.cnf.d/mysql-clients.cnf /etc/my.cnf.d/server.cnf
153 vim /etc/my.cnf
154 vim /etc/my.cnf.d/client.cnf
155 vim /etc/my.cnf.d/server.cnf
156 vim /etc/my.cnf.d/mysql-clients.cnf
157 main config file /etc/my.cnf
158 grep -v ^# /etc/my.cnf : will show lines that are not comments
159 grep -v ^# /etc/my.cnf
The content of my.cnf : some lines are self explanatory
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
symbolic-links=0
[mysqld_safe]
log-error=/var/log/mariadb/mariadb.log
pid-file=/var/run/mariadb/mariadb.pid
MariaDB messages are logged at: /var/log/mariadb/mariadb.log
MySQL Specific Selinux Contexts
171 ps -eZ | grep mysqld
I do not see anything as mysqld/maridb is not running
178 systemctl start mariadb.service
179 systemctl enable mariadb.service
180 ps -eZ | grep mysqld
now the output:
system_u:system_r:mysqld_safe_t:s0 4428 ? 00:00:00 mysqld_safe
system_u:system_r:mysqld_t:s0 4585 ? 00:00:00 mysqld
184 mysqld runs on it’s own domain mysqld_t
Related Selinux file type: mysql_exec_t
etc_t is for /etc/my.cnf.d
mysql_db_t is for /var/lib/mysql/
mysql_log_t is for /var/log/mariadb/
189 ll -dZ /usr/libexec/mysqld /etc/my.cnf.d /var/lib/mysql /var/log/mariadb
The output – please note the Selinux Contexts in the output
drwxr-xr-x. root root system_u:object_r:mysqld_etc_t:s0 /etc/my.cnf.d
-rwxr-xr-x. root root system_u:object_r:mysqld_exec_t:s0 /usr/libexec/mysqld
drwxr-xr-x. mysql mysql system_u:object_r:mysqld_db_t:s0 /var/lib/mysql
drwxr-x—. mysql mysql system_u:object_r:mysqld_log_t:s0 /var/log/mariadb
Corresponding Selinux Port Type: mysql_port_t
196 semanage port -l | grep mysqld
output:
mysqld_port_t tcp 1186, 3306, 63132-63164
Related Selinux Booleans: mysql_connect_any, selinuxuser_mysql_connect_enabled
200 getsebool -a | grep mysql
I see the output
mysql_connect_any –> off
selinuxuser_mysql_connect_enabled –> off
To install MariaDB-Server:
205 yum -y install mariadb-server
already installed. we installed with yum -y install mariadb* [installed everything together]
207 systemctl enable mariadb
We can run mysql_secure_installation – to secure our MariaDB installation

209 mysql_secure_installation

The Output: from mysql_secure_installation command
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB
SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!
In order to log into MariaDB to secure it, we’ll need the current
password for the root user. If you’ve just installed MariaDB, and
you haven’t set the root password yet, the password will be blank,
so you should just press enter here.
Enter current password for root (enter for none):
OK, successfully used password, moving on…
Setting the root password ensures that nobody can log into the MariaDB
root user without the proper authorisation.
Set root password? [Y/n] y
New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables..
… Success!
By default, a MariaDB installation has an anonymous user, allowing anyone
to log into MariaDB without having to have a user account created for
them. This is intended only for testing, and to make the installation
go a bit smoother. You should remove them before moving into a
production environment.
Remove anonymous users? [Y/n] y
… Success!
Normally, root should only be allowed to connect from ‘localhost’. This
ensures that someone cannot guess at the root password from the network.
Disallow root login remotely? [Y/n] y
… Success!
By default, MariaDB comes with a database named ‘test’ that anyone can
access. This is also intended only for testing, and should be removed
before moving into a production environment.
Remove test database and access to it? [Y/n] y
– Dropping test database…
… Success!
– Removing privileges on test database…
… Success!
Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.
Reload privilege tables now? [Y/n] y
… Success!
Cleaning up…
All done! If you’ve completed all of the above steps, your MariaDB

installation should now be secure.
Thanks for using MariaDB!
Enable MariaDB through Firewall and Allow traffic on Port 3306 – default mysql port
218 firewall-cmd –add-service=mysql –perm
220 firewall-cmd –reload
221 systemctl start mariadb
222 systemctl status mariadb
223 start mysql/mariadb
Run MySQL
224 mysql -u root -p
mysqldump is used to backup a database
mysql command can be used to restore a database
you can even use IDEs such as MySQL Workbench to backup and restore MySQL Databases
228 mysql -u root -p
229 mysqldump -u root -p testsayed > testsayeddb.sql
to restore – you need to use < testsayeddb.sql
231 mysql -u root -p testsayed < testsayeddb.sql
Backup and Restore MySQL Database
You can backup multiple databases at once, you can even backup some tables or other database objects using mysqldump
similarly, you can restore multiple databases at the same time using mysql command
just use multiple datbase or database object names with NO comma – one after another
235 mysqldump -u root -p DB1 DB2 DB3 > alldb.sql
when you use restore and give the sql file – if you use db name or table name before < then only that part will be restored irrespective hiow much data is there on the file
example
238 mysql -u root -p DB1 tbl1 < alldb.sql ;
you can use –all-databases or –databases with mysqldump command
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The author is: the_authornRHCE: MariaDB Administration on Redhat/Fedora/CentOS
Check if mariaDB is installed or not
130 yum list installed | grep ^mariadb
mariaDB originated from MySQL – after MySQL Got Bought by Oracle
133 yum list installed | grep ^mariadb
I see – installed though not completely
Output:
mariadb-libs.x86_64 1:5.5.52-1.el7 @anaconda
There are two other components: mariaDB – client component. MariaDB-server: Server Component
The MariaDB packages:
138 mariadb-bench.x86_64 mariadb-devel.x86_64 mariadb-server.x86_64 mariadb-test.x86_64 mariadb.x86_64
Install all packages at once
139 yum install mariadb*
140 yum list installed | grep ^mariadb
Now, I see the following, after I have installed – all MariaDB packages available in my system
mariadb.x86_64 1:5.5.52-1.el7 @local
mariadb-bench.x86_64 1:5.5.52-1.el7 @local
mariadb-devel.x86_64 1:5.5.52-1.el7 @local
mariadb-libs.x86_64 1:5.5.52-1.el7 @anaconda
mariadb-server.x86_64 1:5.5.52-1.el7 @local
mariadb-test.x86_64 1:5.5.52-1.el7 @local
MariaDB Configuration Files
149 ls /etc/my.cnf
150 ls /etc/my.cnf.d/*
The files
/etc/my.cnf.d/client.cnf /etc/my.cnf.d/mysql-clients.cnf /etc/my.cnf.d/server.cnf
153 vim /etc/my.cnf
154 vim /etc/my.cnf.d/client.cnf
155 vim /etc/my.cnf.d/server.cnf
156 vim /etc/my.cnf.d/mysql-clients.cnf
157 main config file /etc/my.cnf
158 grep -v ^# /etc/my.cnf : will show lines that are not comments
159 grep -v ^# /etc/my.cnf
The content of my.cnf : some lines are self explanatory
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
symbolic-links=0
[mysqld_safe]
log-error=/var/log/mariadb/mariadb.log
pid-file=/var/run/mariadb/mariadb.pid
MariaDB messages are logged at: /var/log/mariadb/mariadb.log
MySQL Specific Selinux Contexts
171 ps -eZ | grep mysqld
I do not see anything as mysqld/maridb is not running
178 systemctl start mariadb.service
179 systemctl enable mariadb.service
180 ps -eZ | grep mysqld
now the output:
system_u:system_r:mysqld_safe_t:s0 4428 ? 00:00:00 mysqld_safe
system_u:system_r:mysqld_t:s0 4585 ? 00:00:00 mysqld
184 mysqld runs on it’s own domain mysqld_t
Related Selinux file type: mysql_exec_t
etc_t is for /etc/my.cnf.d
mysql_db_t is for /var/lib/mysql/
mysql_log_t is for /var/log/mariadb/
189 ll -dZ /usr/libexec/mysqld /etc/my.cnf.d /var/lib/mysql /var/log/mariadb
The output – please note the Selinux Contexts in the output
drwxr-xr-x. root root system_u:object_r:mysqld_etc_t:s0 /etc/my.cnf.d
-rwxr-xr-x. root root system_u:object_r:mysqld_exec_t:s0 /usr/libexec/mysqld
drwxr-xr-x. mysql mysql system_u:object_r:mysqld_db_t:s0 /var/lib/mysql
drwxr-x—. mysql mysql system_u:object_r:mysqld_log_t:s0 /var/log/mariadb
Corresponding Selinux Port Type: mysql_port_t
196 semanage port -l | grep mysqld
output:
mysqld_port_t tcp 1186, 3306, 63132-63164
Related Selinux Booleans: mysql_connect_any, selinuxuser_mysql_connect_enabled
200 getsebool -a | grep mysql
I see the output
mysql_connect_any –> off
selinuxuser_mysql_connect_enabled –> off
To install MariaDB-Server:
205 yum -y install mariadb-server
already installed. we installed with yum -y install mariadb* [installed everything together]
207 systemctl enable mariadb
We can run mysql_secure_installation – to secure our MariaDB installation

209 mysql_secure_installation

The Output: from mysql_secure_installation command
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB
SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!
In order to log into MariaDB to secure it, we’ll need the current
password for the root user. If you’ve just installed MariaDB, and
you haven’t set the root password yet, the password will be blank,
so you should just press enter here.
Enter current password for root (enter for none):
OK, successfully used password, moving on…
Setting the root password ensures that nobody can log into the MariaDB
root user without the proper authorisation.
Set root password? [Y/n] y
New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables..
… Success!
By default, a MariaDB installation has an anonymous user, allowing anyone
to log into MariaDB without having to have a user account created for
them. This is intended only for testing, and to make the installation
go a bit smoother. You should remove them before moving into a
production environment.
Remove anonymous users? [Y/n] y
… Success!
Normally, root should only be allowed to connect from ‘localhost’. This
ensures that someone cannot guess at the root password from the network.
Disallow root login remotely? [Y/n] y
… Success!
By default, MariaDB comes with a database named ‘test’ that anyone can
access. This is also intended only for testing, and should be removed
before moving into a production environment.
Remove test database and access to it? [Y/n] y
– Dropping test database…
… Success!
– Removing privileges on test database…
… Success!
Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.
Reload privilege tables now? [Y/n] y
… Success!
Cleaning up…
All done! If you’ve completed all of the above steps, your MariaDB

installation should now be secure.
Thanks for using MariaDB!
Enable MariaDB through Firewall and Allow traffic on Port 3306 – default mysql port
218 firewall-cmd –add-service=mysql –perm
220 firewall-cmd –reload
221 systemctl start mariadb
222 systemctl status mariadb
223 start mysql/mariadb
Run MySQL
224 mysql -u root -p
mysqldump is used to backup a database
mysql command can be used to restore a database
you can even use IDEs such as MySQL Workbench to backup and restore MySQL Databases
228 mysql -u root -p
229 mysqldump -u root -p testsayed > testsayeddb.sql
to restore – you need to use < testsayeddb.sql
231 mysql -u root -p testsayed < testsayeddb.sql
Backup and Restore MySQL Database
You can backup multiple databases at once, you can even backup some tables or other database objects using mysqldump
similarly, you can restore multiple databases at the same time using mysql command
just use multiple datbase or database object names with NO comma – one after another
235 mysqldump -u root -p DB1 DB2 DB3 > alldb.sql
when you use restore and give the sql file – if you use db name or table name before < then only that part will be restored irrespective hiow much data is there on the file
example
238 mysql -u root -p DB1 tbl1 < alldb.sql ;
you can use –all-databases or –databases with mysqldump command
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Post Data:2021-01-24 20:31:57

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RHCE: MariaDB Administration on Redhat/Fedora/CentOS
Check if mariaDB is installed or not
130 yum list installed | grep ^mariadb
mariaDB originated from MySQL – after MySQL Got Bought by Oracle
133 yum list installed | grep ^mariadb
I see – installed though not completely
Output:
mariadb-libs.x86_64 1:5.5.52-1.el7 @anaconda
There are two other components: mariaDB – client component. MariaDB-server: Server Component
The MariaDB packages:
138 mariadb-bench.x86_64 mariadb-devel.x86_64 mariadb-server.x86_64 mariadb-test.x86_64 mariadb.x86_64
Install all packages at once
139 yum install mariadb*
140 yum list installed | grep ^mariadb
Now, I see the following, after I have installed – all MariaDB packages available in my system
mariadb.x86_64 1:5.5.52-1.el7 @local
mariadb-bench.x86_64 1:5.5.52-1.el7 @local
mariadb-devel.x86_64 1:5.5.52-1.el7 @local
mariadb-libs.x86_64 1:5.5.52-1.el7 @anaconda
mariadb-server.x86_64 1:5.5.52-1.el7 @local
mariadb-test.x86_64 1:5.5.52-1.el7 @local
MariaDB Configuration Files
149 ls /etc/my.cnf
150 ls /etc/my.cnf.d/*
The files
/etc/my.cnf.d/client.cnf /etc/my.cnf.d/mysql-clients.cnf /etc/my.cnf.d/server.cnf
153 vim /etc/my.cnf
154 vim /etc/my.cnf.d/client.cnf
155 vim /etc/my.cnf.d/server.cnf
156 vim /etc/my.cnf.d/mysql-clients.cnf
157 main config file /etc/my.cnf
158 grep -v ^# /etc/my.cnf : will show lines that are not comments
159 grep -v ^# /etc/my.cnf
The content of my.cnf : some lines are self explanatory
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
symbolic-links=0
[mysqld_safe]
log-error=/var/log/mariadb/mariadb.log
pid-file=/var/run/mariadb/mariadb.pid
MariaDB messages are logged at: /var/log/mariadb/mariadb.log
MySQL Specific Selinux Contexts
171 ps -eZ | grep mysqld
I do not see anything as mysqld/maridb is not running
178 systemctl start mariadb.service
179 systemctl enable mariadb.service
180 ps -eZ | grep mysqld
now the output:
system_u:system_r:mysqld_safe_t:s0 4428 ? 00:00:00 mysqld_safe
system_u:system_r:mysqld_t:s0 4585 ? 00:00:00 mysqld
184 mysqld runs on it’s own domain mysqld_t
Related Selinux file type: mysql_exec_t
etc_t is for /etc/my.cnf.d
mysql_db_t is for /var/lib/mysql/
mysql_log_t is for /var/log/mariadb/
189 ll -dZ /usr/libexec/mysqld /etc/my.cnf.d /var/lib/mysql /var/log/mariadb
The output – please note the Selinux Contexts in the output
drwxr-xr-x. root root system_u:object_r:mysqld_etc_t:s0 /etc/my.cnf.d
-rwxr-xr-x. root root system_u:object_r:mysqld_exec_t:s0 /usr/libexec/mysqld
drwxr-xr-x. mysql mysql system_u:object_r:mysqld_db_t:s0 /var/lib/mysql
drwxr-x—. mysql mysql system_u:object_r:mysqld_log_t:s0 /var/log/mariadb
Corresponding Selinux Port Type: mysql_port_t
196 semanage port -l | grep mysqld
output:
mysqld_port_t tcp 1186, 3306, 63132-63164
Related Selinux Booleans: mysql_connect_any, selinuxuser_mysql_connect_enabled
200 getsebool -a | grep mysql
I see the output
mysql_connect_any –> off
selinuxuser_mysql_connect_enabled –> off
To install MariaDB-Server:
205 yum -y install mariadb-server
already installed. we installed with yum -y install mariadb* [installed everything together]
207 systemctl enable mariadb
We can run mysql_secure_installation – to secure our MariaDB installation

209 mysql_secure_installation

The Output: from mysql_secure_installation command
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB
SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!
In order to log into MariaDB to secure it, we’ll need the current
password for the root user. If you’ve just installed MariaDB, and
you haven’t set the root password yet, the password will be blank,
so you should just press enter here.
Enter current password for root (enter for none):
OK, successfully used password, moving on…
Setting the root password ensures that nobody can log into the MariaDB
root user without the proper authorisation.
Set root password? [Y/n] y
New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables..
… Success!
By default, a MariaDB installation has an anonymous user, allowing anyone
to log into MariaDB without having to have a user account created for
them. This is intended only for testing, and to make the installation
go a bit smoother. You should remove them before moving into a
production environment.
Remove anonymous users? [Y/n] y
… Success!
Normally, root should only be allowed to connect from ‘localhost’. This
ensures that someone cannot guess at the root password from the network.
Disallow root login remotely? [Y/n] y
… Success!
By default, MariaDB comes with a database named ‘test’ that anyone can
access. This is also intended only for testing, and should be removed
before moving into a production environment.
Remove test database and access to it? [Y/n] y
– Dropping test database…
… Success!
– Removing privileges on test database…
… Success!
Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.
Reload privilege tables now? [Y/n] y
… Success!
Cleaning up…
All done! If you’ve completed all of the above steps, your MariaDB

installation should now be secure.
Thanks for using MariaDB!
Enable MariaDB through Firewall and Allow traffic on Port 3306 – default mysql port
218 firewall-cmd –add-service=mysql –perm
220 firewall-cmd –reload
221 systemctl start mariadb
222 systemctl status mariadb
223 start mysql/mariadb
Run MySQL
224 mysql -u root -p
mysqldump is used to backup a database
mysql command can be used to restore a database
you can even use IDEs such as MySQL Workbench to backup and restore MySQL Databases
228 mysql -u root -p
229 mysqldump -u root -p testsayed > testsayeddb.sql
to restore – you need to use < testsayeddb.sql
231 mysql -u root -p testsayed < testsayeddb.sql
Backup and Restore MySQL Database
You can backup multiple databases at once, you can even backup some tables or other database objects using mysqldump
similarly, you can restore multiple databases at the same time using mysql command
just use multiple datbase or database object names with NO comma – one after another
235 mysqldump -u root -p DB1 DB2 DB3 > alldb.sql
when you use restore and give the sql file – if you use db name or table name before < then only that part will be restored irrespective hiow much data is there on the file
example
238 mysql -u root -p DB1 tbl1 < alldb.sql ;
you can use –all-databases or –databases with mysqldump command
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Post Data:2021-01-24 20:25:57

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Basic Information on Exception Handling in .Net

Why exception handling? In your applications, unexpected error situations may occur that are out of your application scope and your application logic. These are actually external to your application. For example, while you are reading a file from hard drive, the file may not be there; or the remote server may be too busy or unavailable to get back to you with the result of your query. Exception handling addresses such situations.

How can you handle such situations:

• Use try, catch, finally structure to address such situations
• Put the code where, you are anticipating an exception inside a try{} block. Put the code to handle the error situation in catch (Exception ex) {} blocks. You can have multiple catch blocks where each one will address a specific type of exception situation.
• One more note, the code block where exception may occur may need to execute some logic/code whether an exception occurs or or not such as closing a file, closing the database connection. To accomplish this, you can use a finally block. A finally block is always executed, regardless of whether an exception is thrown or not.
• When an exception occurs, the events are thrown by the environment. You need to address that if you want to. Else, your users will see the errors and will cause a bad user experience.
• You can even throw exceptions on your own in your code. But why? say if you anticipate that there will be some error situations that are not external but related to your application logic and you actually do not want to handle those situations (serve some services in those situations for example) in your application. You can just throw exceptions and think that these are the conditions; you do not want to support in your application. Throw exception and provide some generalized response to your visitors.
• You can also handle exceptions throw the web objects’ built in error events such as Page_Error, Global_Error, Application_Error.
• In certain situations, You can take advantage of the error pages of the webserver to provide useful information to your visitors. You can replace the default error pages of your web-server and provide customized error pages to your visitor
• Finally, you can use tracing to log the error events. Monitor the tracing to understand which types of situations occur more frequently than others. And find out a solution and apply the solution
• It is possible to turn on and off this tracing without modifying the application code. You can make use of the web.config file configurations

Regarding error pages, you can provide your custom error pages for the standard HTTP error codes. Some codes are given below:204:No Content, 301:Moved, Moved Permanently, 302: Found, Redirect, 400:bad request, 401:unauthorized, 403: forbidden, 404:not found, 408:request time out, 500:internal server error, 503:service unavailable, 505:Http version not supported.

You can also make use of the errorPage attribute of the Page object to define an error page for the exceptions of that particular page. Page level settings override the application level settings (as provided by web.config file)

• How to enable application level tracing: use something similar as below in your web.config file

  { and } are used instead of < and > respectively.
      {configuration}
          {system.web}
              {trace enabled="true" requestLimit="40" localOnly="false"/}
          {/system.web}
      {/configuration}
  

• to enable tracing for a particular page, use the trace property of the Document object
• how to write tracing information to the trace log: Trace.Warn()

From: http://sitestree.com/?p=3744
Categories:.Net Web Applications
Tags:
Post Data:2016-07-16 12:23:19

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Encryption and .Net

Dot net provides rich support for data encryption. the namespace System.Security.Cryptography includes the encryption features.

There are three primary concepts related to encryption such as Hashing, Symmetric Encryption, and Asymmetric encryption. A hash is a data fingerprint, a small data that represents the uniqueness of a large block of data. In Symmetric Encryption, a single key is used for both encryption and decryption. In Asymmetric encryption, two different keys are used, one for encryption and another one for decryption. In real world applications, a combination of all three methods are used to provide better security.

A digital transmission of a check can be as follows: create the hash of the check, encrypt the hash with the public key using asymmetric encryption, apply the encrypted hash on the document, encrypt the symmetric encryption key with asymmetric encryption method, encrypt the check with symmetric encryption, transmit the encrypted key and encrypted document to the receiver

Hash Example

   hash = New Encryption.Hash(Encryption.Hash.Provider.CRC32)
   data = New  Encryption.Data("Hash Browns")
   hash.Calculate(data)

Symmetric example:

    sym = New Encryption.Symmetric(Encryption.Symmetric.Provider.Rijndael)
    key = New Encryption.Data("Pass")
    Encryption.Data encryptedData;
    encryptedData = sym.Encrypt(New Encryption.Data("Secret"), key)
    string base64EncryptedString = encryptedData.ToBase64

Asymmetric Example

  
        asym = New Encryption.Asymmetric
    pubkey = New Encryption.Asymmetric.PublicKey
    privkey = New Encryption.Asymmetric.PrivateKey
    asym.GenerateNewKeyset(pubkey, privkey)

    secret = "ancient chinese"
    Encryption.Data encryptedData
    encryptedData = asym.Encrypt(New Encryption.Data(secret), pubkey)
    Encryption.Data decryptedData 
    asym2 = New Encryption.Asymmetric
    decryptedData = asym2.Decrypt(encryptedData, privkey)

From: http://sitestree.com/?p=3742
Categories:.Net Web Applications
Tags:
Post Data:2016-07-16 12:15:58

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