UNIX/Linux script to set or update the password for multiple users

Example:

Sample users name: dummy1, dummy2, dummy3, dummy4 and dummy5

for counter in {1..5}; do echo "dummy$counter" | passwd dummy$counter --stdin ; done


NOTE: {1..5} syntax will not work in certain shell. But it will work definitely in bash.

UNIX/Linux Shell Script to delete multiple users

Example 1:

To delete the users: dummy1, dummy2, dummy3, dummy4 and dummy5

for  counter in {1..5}; do userdel dummy$counter; done

It can also be written as,

for counter in {1..5}
 do 
       userdel dummy$counter
 done

NOTE: {1..5} syntax will not work in certain shell. But it will work definitely in bash.

Example 2:

cat > user.list
vijay
sanjay
ajay
sujay

for  user in `cat  user.list`;do userdel $user;done

UNIX/Linux Shell script to create multiple users

Example 1:

NOTE: {1..5} syntax will not work in certain shell. But it will work definitely in bash.

Example 2:

cat > user.list
vijay
sanjay
ajay
sujay

for user in `cat user.list`;do useradd $user;done

grep -i jay /etc/passwd | cut -d: -f1
vijay
sanjay
ajay
sujay

How to grep recursively in Solaris?

In Solaris, Solaris grep will not provide recursive option -r to search a pattern recursively. But solaris provides another command called ggrep to search recursively. But ggrep location is normally not included in the PATH variable.

[vjsujay@cheetah:/home/vjsujay]$which ggrep
no ggrep in /usr/bin /bin /usr/sbin /sbin /usr/local/bin

[vjsujay@cheetah:/home/vjsujay]$ls -l /usr/sfw/bin/ggrep
-r-xr-xr-x   3 root     bin       125664 Jan 23  2005 /usr/sfw/bin/ggrep
[vjsujay@cheetah:/home/vjsujay]$

Example for recursive grep using ggrep in Solaris:

[vjsujay@cheetah:/home/vjsujay/sp]$ /usr/sfw/bin/ggrep -R 'apple' *
file.txt:apple
file3.txt:apple orange
jsk/jsk.txt:apple
[vjsujay@cheetah:/home/vjsujay/sp]$