I have a bunch of servers, on which I run experiments using screen
. The procedure is the following :
ssh
to server XXXscreen
screen
While the experiments are running, I can easily find on which servers they are by ssh
ing to all servers and listing my running processes (using top
or ps
).
However, once the experiments are finished, how could I find on which servers I have a screen session opened (so that I can have a look at the output, relaunch them, etc.) ?
PS: my experiments do print their output to files, too... but this is not the point of my question.
This question is related to
linux
bash
command-line
gnu-screen
ps x | grep SCREEN
to see what is that screen running in case you used the command
screen -A -m -d php make_something.php
The command screen -list may be what you want.
See the man
Multiple folks have already pointed that
$ screen -ls
would list the screen sessions.
Here is another trick that may be useful to you.
If you add the following command as a last line in your .bashrc file on server xxx, then it will automatically reconnect to your screen session on login.
screen -d -r
Hope you find it useful.
So you're using screen to keep the experiments running in the background, or what? If so, why not just start it in the background?
./experiment &
And if you're asking how to get notification the job i done, how about stringing the experiment together with a mail command?
./experiment && echo "the deed is done" | mail youruser@yourlocalworkstation -s "job on server $HOSTNAME is done"
In most cases a screen -RRx $username/
will suffice :)
If you still want to list all screens then put the following script in your path and call it screen or whatever you like:
#!/bin/bash
if [[ "$1" != "-ls-all" ]]; then
exec /usr/bin/screen "$@"
else
shopt -s nullglob
screens=(/var/run/screen/S-*/*)
if (( ${#screens[@]} == 0 )); then
echo "no screen session found in /var/run/screen"
else
echo "${screens[@]#*S-}"
fi
fi
It will behave exactly like screen except for showing all screen sessions, when giving the option -ls-all as first parameter.
For windows system
Open putty
then login in server
If you want to see screen in Console then you have to write command
Screen -ls
if you have to access the screen then you have to use below command
screen -x screen id
Write PWD
in command line to check at which folder you are currently
I'm not really sure of your question, but if all you really want is list currently opened screen session, try:
screen -ls
While joshperry's answer is correct, I find very annoying that it does not tell you the screen name (the one you set with -t option), that is actually what you use to identify a session. (not his fault, of course, that's a screen's flaw)
That's why I instead use a script such as this: ps auxw|grep -i screen|grep -v grep
Source: Stackoverflow.com