systemctl start httpd
systemctl start mariadb
systemctl restart httpd
systemctl restart mariadb

systemctl enable httpd
systemctl enable mariadb

Monitor Process in Linux

•ps

•pstree

•top

Who Monitors Processes?

•Admins

•Developers as needed

Tasks

•start, stop, restart, status, kill

•powershell.exe -noprofile -executionpolicy bypass -file .\hello.ps1

•Set-ExecutionPolicy -Scope CurrentUser -ExecutionPolicy Bypass -Force;

•Set-ExecutionPolicy -Scope CurrentUser -ExecutionPolicy Unrestricted -Force;

•set-executionpolicy remotesigned

•

•

•powershell Compress-Archive –LiteralPath lab8 –DestinationPath lab8.zip

•powershell Expand-Archive –LiteralPath lab8.zip –DestinationPath “C:\mypath” -Force

Signed Integers

egrep ‘^[+-]?[0-9]+$’ data.txt

Floating Point Numbers

egrep ‘^[+-]?[0-9]+[.]?[0-9]*$’ data.txt

Canadian Postal Code

egrep -q ‘^[A-Z][0-9][A-Z] *[0-9][A-Z][0-9]$’ info.txt

df command – Shows the amount of disk space used and available on Linux file systems.

du command – Display the amount of disk space used by the specified files and for each subdirectory.

free command

top or htop command

vmstat command

dmidecode command

/proc/meminfo file

Linux commands show all running processes

Apart from ps command, you can also use the following commands to display info about processes on Linux operating systems:

top command : Display and update sorted information about Linux processes.

atop command : Advanced System & Process Monitor for Linux.

htop command : Interactive process viewer in Linux.

pgrep command : Look up or signal processes based on name and other attributes.

pstree command : Display a tree of processes.

cut -d “:” -f 1,3 /etc/passwd

echo $aLine | cut -d “:” -f 1,3

cat /etc/passwd | cut -d “:” -f1,3