how to kill the tty in unix

Question

This is the result of the finger command  Today Monday  when I  Vidya  logged in   sekic1083  6 14am    home vidya  - gt  finger Name        Tty       Idle   Login Time    Where Felix   pts 0        -       Thu 10 06  sekic2594 rnd ki sw  john        pts 1       2d       Fri 15 43 john         pts 2      2d       Fri 15 43 john       pts 3       4     Fri 15 44 john       pts 7       -         Thu 16 25 Vidya      pts 0       -         Mon 06 14 Vidya      pts 5       -         Mon 06 14 Vidya      pts 6       -         Tue 10 13 Vidya      pts 9       -         Wed 05 39 Vidya      pts 10      -         Wed 10 23   Under column the Tty pts 0 and pts 5 are the current active terminals    Apart from those two pts 6  pts 9 and pts 10 are also present and I had logged into these last week  But the idle time for them is showing as  -   not idle     How can I kill these 6 9 and 10 terminals

User · Answer

You can use killall command as well    -o  --older-than               Match only processes that are older  started before  the time specified   The time is specified as a float then a unit   The units are s m h d w M y for seconds  minutes  hours   days   -e  --exact               Require an exact match for very long names   -r  --regexp               Interpret process name pattern as an extended regular expression   This worked like a charm

User · Answer

for example kill pts 0  pkill -9 -t pts 0

User · Answer

In addition to AIXroot s answer  there is also a logout function that can be used to write a utmp logout record  So if you don t have any processes for user xxxx  but userdel says  userdel  account xxxx is currently in use   you can add a logout record manually  Create a file logout c like this    include  lt stdio h gt   include  lt utmp h gt   int main int argc  char  argv        if  argc    2        return logout argv 1          else       fprintf stderr   Usage  logout device n        return 1          Compile it   gcc -lutil -o logout logout c   And then run it for whatever it says in the output of finger s  On since  line s  as a parameter      finger xxxx Login  xxxx                             Name  Directory   home xxxx                   Shell   bin bash On since Sun Feb 26 11 06  GMT  on 127 0 0 1 6  messages off  from 127 0 0 1 On since Fri Feb 24 16 53  GMT  on pts 6  idle 3 days 17 16  from 127 0 0 1 Last login Mon Feb 10 14 45  GMT  on pts 11 from somehost example com Mail last read Sun Feb 27 08 44 2014  GMT  No Plan     userdel xxxx userdel  account  xxxx  is currently in use      logout 127 0 0 1 6     logout pts 6   userdel xxxx no crontab for xxxx

User · Answer

you do not need to know pts number  just type      ps all   grep bash           then                  kill pid1 pid2 pid3

User · Answer

The simplest way is with the pkill command  In your case   pkill -9 -t pts 6 pkill -9 -t pts 9 pkill -9 -t pts 10   Regarding tty sessions  the commands below are always useful   w - shows active terminal sessions  tty - shows your current terminal session  so you won t close it by accident   last   grep logged - shows currently logged users  Sometimes we want to close all sessions of an idle user  ie  when connections are lost abruptly    pkill -u username - kills all sessions of  username  user   And sometimes when we want to kill all our own sessions except the current one  so I made a script for it  There are some cosmetics and some interactivity  to avoid accidental running on the script       bin bash MYUSER  whoami  MYSESSION  tty   cut -d    -f3-  OTHERSESSIONS  w  MYUSER   grep    MYUSER    grep -v   MYSESSION    cut -d    -f2  printf   e 33mCurrent session e 0m   MYUSER  MYSESSION  n   if      -z  OTHERSESSIONS     then   printf   e 33mOther sessions  e 0m n    w  MYUSER   egrep  LOGIN    MYUSER    grep -v   MYSESSION    column -t   echo ----------   read -p  Do you want to force close all your other sessions   Y Yes  N No    answer   answer  echo  answer   tr A-Z a-z    confirm   y   yes      if       confirm           answer      then   for SESSION in  OTHERSESSIONS     do          pkill -9 -t  SESSION          echo Session  SESSION closed      done   fi else         echo  There are no other sessions for the user   MYUSER    fi

User · Answer

Try this   skill -KILL -v pts 6  skill -KILL -v pts 9  skill -KILL -v pts 10

User · Answer

You can run   ps -ft pts 6 -t pts 9 -t pts 10   This would produce an output similar to   UID        PID  PPID  C STIME TTY          TIME CMD Vidya      772  2701  0 15 26 pts 6    00 00 00 bash Vidya      773  2701  0 16 26 pts 9    00 00 00 bash Vidya      774  2701  0 17 26 pts 10   00 00 00 bash   Grab the PID from the result   Use the PIDs to kill the processes   kill  lt PID1 gt   lt PID2 gt   lt PID3 gt        For the above example   kill 772 773 774   If the process doesn t gracefully terminate  just as a last option you can forcefully kill by sending a SIGKILL  kill -9  lt PID gt

User · Answer

If you want to close tty for specific user with all the process  above command is the easiest  You can use   killall -u user name

User · Answer

I had the same question as you but I wanted to kill the gnome terminal which I was in  I read the manual on  who  and found that you can list all of the sessions logged into your computer with the  -a  option and then the  -l  option prints the system login processes    who -la    You should get something like this  Then all you have to do is kill the process with the  kill  command   kill  lt PID gt

User · Answer

I had the same problem today   I had NO remaining processes  but the remaining finger entry of user  xxx   which prevent me the deletion of this user using  userdel xxx    Error message was  userdel  account  xxx  is currently in use   It looked like a crashed terminal session  So I rebooted  but the issue remained   last xxx xxx      pts 5        10 1 2 3     Fri Feb  7 10 25 - crash   01 27    So I  re moved the  var run utmp file   mv  var run utmp  var run utmp save   touch  var run utmp   This cleared all finger entries  Unfortunately in this way even the current running sessions will be cleared  If this is an issue for you  you have to reboot  after you  re moved the utmp file   However in my case this was the solution  Afterwards I was able to successfully delete the user  using  userdel xxx

[linux] how to kill the tty in unix

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