Thread: linux pipe command questions

5. Prints out the login names (and only the login names) of the four users that most recently logged to your UNIX machine. Tip: use the last command to print out the last logins and grep to filter out irrelevant lines of the output


itried to solve it ,
each time i enter the console it regesters as a login
even thow i didnt loged out of the system.

so the problem is that after i opened the console box 4 times
the command:
last -4|cut -d" " -f1| uniq -u

it only showed a single user.
another problem is that if i change it to : last -50
it showed the same user multiple times.

how to i make a command that will show the last 4 users that logged in,
and that they will show only 1 time???

Originally Posted by googler

5. Prints out the login names (and only the login names) of the four users that most recently logged to
so the problem is that after i opened the console box 4 times
the command:
last -4|cut -d" " -f1| uniq -u
it only showed a single user.
another problem is that if i change it to : last -50
it showed the same user multiple times.
how to i make a command that will show the last 4 users that logged in,
and that they will show only 1 time???

your command works, but only if 4 different users log in, I’ve tried and :

eniz@debian4:~$ last -4|cut -d" " -f1| uniq -u
papoo
eniz
gaskelm
sauvagel

look what happenes
it will show only on the last 4 logins

and my gole is to show there last 4 users that where logged in