linux script to display all users

recar · 07-15-2010, 06:47 AM

Hi can anybody help with with shell scripting.I need a script to display all users in system.i know there are commands to display all users but i need a script for that.hope someone can share the script.

wertik · 07-15-2010, 06:56 AM

Quote:

Originally Posted by recar

Hi can anybody help with with shell scripting.I need a script to display all users in system.i know there are commands to display all users but i need a script for that.hope someone can share the script.

??

#!/bin/sh
who
#EOF

grail · 07-15-2010, 06:57 AM

What have you tried? It is all well and good to ask a question but without information or parameters the answers you get could be almost anything.
For example:

Code:

cat /etc/passwd

Now its not very useful on its own but all the usernames will be there somewhere.

rdgreenlaw · 07-15-2010, 07:06 AM

If you simply want to see who is on the system use the who command.

Just type who and press enter. This produces a list of users currently on the system, their terminal or port number, date logged in, time logged in and if attached to a display the display number.

If you simply want the user names and nothing else use the following code:

Code:

who | awk -F " " '{print $1}'

To make a script, use the following:

Code:

#!/bin/sh

# filename: whoisloggedon

who | awk -F " " '{print $1}'

Don't forget to make the script executable

chmod 766 whoisloggedon

rdgreenlaw · 07-15-2010, 07:24 AM

I gave you a script to show who was logged in. If you want to see real users names even if they are not logged in use this instead:

Code:

#!/bin/sh
# filename: whocanlogon

cat /etc/passwd | awk -F ":" '{if $3 ==0 || ($3> 999 && $3 < 65534)) print $1}'