'list of logged in unique users in linux

I am working in linux environment as a non root user. I am using users command to get the logged in users

users

But it returns the user names multiple times because multiple shells are created with same login. Is there any way to print the unique user list using users commad. Even i tried by 

users | sort -u

Still it returns the user names multiple times.

linuxshellunixshuniq


Solution 1:[1]

Try with this - who| awk '{print $1}'|sort -u

Solution 2:[2]

users | sort -u

Still it returns the user names multiple times.

Of course. sort is line based, and users only prints a single line.

What you want is to just look at the first word per line before sort -u in who output:

$ who|cut -f 1 -d " "|sort -u
barney
fred
wilma

or

$ who|sed 's/ .*//' |sort -u
barney
fred
wilma

However, if you are interested in some of the actual lines output by who you can also use

$ who|sort -u -k 1,1
barney  pts/23       Aug 26 10:11 (:5.0)
fred    pts/3        Jun 11 18:38 (:6.0)
wilma   pts/0        Jul 31 07:29 (:3.0)

Solution 3:[3]

You can try this command: who | cut -d' ' -f1 | sort | uniq

You can use w command to get the list of logged in users and the details

Solution 4:[4]

This one is a bit shorter:

users | tr ' '  '\n' | sort -u

Sources

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Source: Stack Overflow

Solution Source
Solution 1 ratednitesh
Solution 2
Solution 3 Mahi
Solution 4 Tim

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