Question: Sometimes my script bugs out and multiple screen sessions with the same name get created. Is there a way to kill all of these with this name in one command?

```
Rx:/scripts# screen -S haydoz-script -X quit
There are several suitable screens on:
        13372.haydoz-script     (09/10/11 07:44:05)     (Detached)
        12287.haydoz-script     (09/10/11 07:30:45)     (Detached)
        12230.haydoz-script     (09/10/11 07:17:42)     (Detached)
        7824.haydoz-script      (09/09/11 11:42:26)     (Detached)
        7764.haydoz-script      (09/09/11 11:35:40)     (Detached)
        15753.haydoz-script     (09/04/11 15:00:27)     (Detached)
        15744.haydoz-script     (09/04/11 15:00:26)     (Detached)

```

There are other screens running besides these ones that I do not want to kill.

Answer: 
If there are no other `screen` sessions running you can use the "hard" way and just `kill` them with `killall screen`.

If you want to be nice you can iterate over your list of screen sessions and kill them one after another:

```
# screen -S foo && screen -S foo
[detached]
[detached]
# screen -ls
There are screens on:                                                                                                                                                                                      
        8350.foo        (Detached)                                                                                                                                                                         
        8292.foo        (Detached)                                                                                                                                                                         
2 Sockets in /tmp/screens/S-joschi.                                                                                                                                                                        

# This is the interesting line. Just replace "foo" with the name of your session(s)
# for session in $(screen -ls | grep -o '[0-9]*\.foo'); do screen -S "${session}" -X quit; done
# screen -ls
No Sockets found in /tmp/screens/S-joschi.

```
`screen -ls "$SESSION_NAME"` lists the full names of matching sessions on tab-indented lines. So you can iterate on these lines, extract the full names, and call the `quit` command on each matching name.

```
SESSION_NAME='haydoz-script'
screen -ls "$SESSION_NAME" | (
  IFS=$(printf '\t');
  sed "s/^$IFS//" |
  while read -r name stuff; do
      screen -S "$name" -X quit
  done
)

```