bash-3.2$ cat firstscript.sh
#!/bin/sh
#clear
echo “SCRIPT BEGINS”
echo “Hello $LOGNAME!”
echo
echo “Today’s date and time: c”
date
echo
mynum=21
myday=”Monday”
echo “The value of mynum is $mynum”
echo “The value of myday is $myday”
echo
echo “SCRIPT FINISHED!!”
echo
bash-3.2$ ./firstscript.sh
SCRIPT BEGINS
Hello shell!

Today’s date and time: Fri Apr 27 08:51:53 EDT 2018

The value of mynum is 21
The value of myday is Monday

SCRIPT FINISHED!!

From: http://sitestree.com/?p=12213
Categories:Linux/Unix: Shell Programming – 001
Tags:
Post Data:2018-04-29 23:55:03

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bash-3.2$ cat echoscript2.ksh
#!/bin/ksh
#clear
print “SCRIPT BEGINS”
print “Hello $LOGNAME”
print
print -n “Todays date is: ”
date ‘+%m/%d/%y’
print -n “and the current time is: ”
date ‘+%H:%M:%S%n’
print “Now a list of the processes in the current
shell”
ps
print “SCRIPT FINISHED!!”

bash-3.2$ ./echoscript2.ksh
SCRIPT BEGINS
Hello shell

Todays date is: 04/27/18
and the current time is: 08:05:20

Now a list of the processes in the current
shell
PID TTY TIME CMD
18641 syscon 0:00 ps
18585 syscon 0:00 sh
18638 syscon 0:00 echoscri
18589 syscon 0:00 bash
SCRIPT FINISHED!!

From: http://sitestree.com/?p=12210
Categories:Linux/Unix: Shell Programming – 001
Tags:
Post Data:2018-04-28 23:08:39

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bash-3.2$ cat echoscript1.sh
#!/bin/sh
#clear
echo “SCRIPT BEGINS”
echo “Hello $LOGNAME”
echo
echo “Todays date is: c”
date ‘+%m/%d/%y’
echo “and the current time is: c”
date ‘+%H:%M:%S%n’
echo “Now a list of the processes in the current shell”
ps
echo “SCRIPT FINISHED!!”
bash-3.2$ ./echoscript1.sh
SCRIPT BEGINS
Hello shell

Todays date is: 04/27/18
and the current time is: 07:58:45

Now a list of the processes in the current shell
PID TTY TIME CMD
18612 syscon 0:00 ps
18585 syscon 0:00 sh
18609 syscon 0:00 echoscri
18589 syscon 0:00 bash
SCRIPT FINISHED!! From: http://sitestree.com/?p=12208
Categories:Linux/Unix: Shell Programming – 001
Tags:
Post Data:2018-04-27 23:03:01

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#!/bin/sh

#If then else example
#if elif else

NOF=5

if [ $NOF -eq 27 ]

then

echo “No of files and directories = 27”

elif [ $NOF -gt 27 ]

then

echo “No of files are dir are greator than 27”

else

echo “No of files and directories are less than 27”

fi

exit From: http://sitestree.com/?p=12201
Categories:Linux/Unix: Shell Programming – 001
Tags:
Post Data:2018-04-16 19:47:32

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#!/bin/ksh

# on every thursday and friday tar all contents of /etc folder into /export/home/shell/test/. On thursday only create a log file with the list of files
#in the tar file. On thursday untar /export/home/shell/test/etc.tar into vfstab . Then log vfstab exist or not information

DAY=`date +%a`
DATESTAMP=`date +%m-%d-%Y-%H:%M`

if [[ “$DAY” == Mon ]]
then

echo “Today is Monday”

elif [[ “$DAY” == Tue ]]
then

echo “Today is Tuesday”

elif [[ “$DAY” == Wed ]]
then

echo “Today is Wednesday”

elif [[ “$DAY” == Thu ]]
then

echo “Today is Thursday” >> /export/home/shell/test/log/backup-$DATESTAMP.log
cd /etc
tar cvf /export/home/shell/test/etc.tar * >> /export/home/shell/test/log/backup-$DATESTAMP.log
cd /export/home/shell/test
tar xvf etc.tar vfstab

if [[ -f vfstab ]]
then
echo “file vfstab exist” >> /export/home/shell/test/log/backup-$DATESTAMP.log
else
echo “file vfstab does not exist” >> /export/home/shell/test/log/backup-$DATESTAMP.log
fi

elif [[ “$DAY” == Fri ]]
then

echo “Today is Friday”
cd /etc
tar cvf /export/home/shell/test/etc.tar *

elif [[ “$DAY” == Sat ]]
then
echo “Today is Saturday”

else
echo “Today is Sunday”

fi

exit From: http://sitestree.com/?p=12199
Categories:Linux/Unix: Shell Programming – 001
Tags:
Post Data:2018-04-16 19:44:31

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Example Output

bash-3.2$ ./while-loop-example.sh
Enter your Number
10
10 * 1 = 10
10 * 2 = 20
10 * 3 = 30
10 * 4 = 40
10 * 5 = 50
10 * 6 = 60
10 * 7 = 70
10 * 8 = 80
10 * 9 = 90
10 * 10 = 100

The Code

#!/bin/ksh

#example : how to use while loop in shell programming

multiplication()
{

#clear
i=1
while (( i <= 10 ))
do
echo “$Y * $i = `expr $Y * $i`”
(( i = i + 1 ))
done

}

echo “Enter your Number”
read X

case “$X” in

1)
Y=1
multiplication
;;

2)

Y=2
multiplication
;;

3)

Y=3
multiplication
;;

4)

Y=4
multiplication
;;

5)

Y=5
multiplication
;;

6)

Y=6
multiplication
;;

7)

Y=7
multiplication
;;

8)

Y=8
multiplication
;;

9)

Y=9
multiplication
;;

10)

Y=10
multiplication
;;

esac
exit From: http://sitestree.com/?p=12197
Categories:Linux/Unix: Shell Programming – 001
Tags:
Post Data:2018-04-16 19:31:36

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#!/bin/sh

#count the number of files in current directory, and check if the number is equal to or greater than or less than 26

#NOF represents number of files

NOF=`ls -l | wc -l`

if [ $NOF -eq 26 ]
then
echo “No of files and directories is equal to 26”
fi

if [ $NOF -gt 26 ]
then
echo “No of files is greater than 26”
fi

if [ $NOF -lt 26 ]
then
echo “No of files is less than 26”
fi

exit From: http://sitestree.com/?p=12195
Categories:Linux/Unix: Shell Programming – 001
Tags:
Post Data:2018-04-16 19:23:07

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#!/bin/sh

#find all currently running shells and create in full listing form for them . Log the data into a file in every 30 secs
# -e means currentl running
# -f means full format output
# sleep takes parameters in seconds

ps -ef | grep shell >> process.log
sleep 30

ps -ef | grep shell >> process.log
sleep 30

ps -ef | grep shell >> process.log
sleep 30 From: http://sitestree.com/?p=12193
Categories:Linux/Unix: Shell Programming – 001
Tags:
Post Data:2018-04-16 19:08:10

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Output First

bash-3.2$ ./ksh_case_chart.sh
Enter your Number
9
9 * 1 = 9
9 * 2 = 18
9 * 3 = 27
9 * 4 = 36
9 * 5 = 45
9 * 6 = 54
9 * 7 = 63
9 * 8 = 72
9 * 9 = 81
9 * 10 = 90

—-
???

#!/bin/ksh

#example on how to use case and for loop

multi()
{
#clear
for i in 1 2 3 4 5 6 7 8 9 10
do
echo “$Y * $i = `expr $Y * $i`”
done
}

#take a number from the user ( 1..10)
echo “Enter your Number”
read X

case “$X” in

1)
Y=1
multi
;;

2)
Y=2
multi
;;

3)
Y=3
multi
;;

4)
Y=4
multi
;;

5)
Y=5
multi
;;

6)
Y=6
multi
;;

7)
Y=7
multi
;;

8)
Y=8
multi
;;

9)
Y=9
multi
;;

10)
Y=10
multi
;;

esac
exit

—– From: http://sitestree.com/?p=12189
Categories:Linux/Unix: Shell Programming – 001
Tags:
Post Data:2018-04-16 18:48:57

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