[Solved] Bash: Want to supress output but still have it recorded

I'd like to run a test, have it known but the output not to show. How do I do this?
[[ -z $(ls -1 screencast-[0-9][0-9][0-9][0-9]*) ]] && echo hi
If I send it to /dev/null it doesn't get recorded, what do I do?
Last edited by Gen2ly (2012-08-23 14:08:00)

Send it to a file - or a variable.
*think I must be missing something*
Oh, after reading better I think I get it, though the answer would be the same. Do you only want the return code of the command used for the test while other output is ignored? Various options depending on your need:
commmand >/dev/null
[[ $? -eq 0 ]] && conditionally-executed-command
[[ `command >/dev/null` ]] && conditionally-executed-command
command > ~/my.log
VARIABLE_LOG=$(command)
Last edited by Trilby (2012-08-23 12:46:26)

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I didn't think re-opening my old thread was a good idea so I'm starting new one to address 1 issue I have left to conquer.
With some help from JWR I have built my prompt and it works for users and root logged into a local machine. Logging into a remote machine does change my user's prompt by appending :ssh: to it. However, as the root user logged into a remote machine, which should have the :ssh: appended to it, doesn't work. By that I mean that root logged in to a remote system doesn't get the correct prompt. I want the prompt to look like this for root:
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### Other prompt styles to use later
This is root's current script:
### A PS1 for each computer is on the respective lines in this order:
### ### White Yunzi / Silver Yunzi / Pink Yunzi / Rainbow EeePC
if [[ -n $SSH_CLIENT ]]; then
# PS1='\[\e[0;37m\]: \[\e[1;32m\]\W\[\e[0;37m\] :\[\e[0;37m\]:\[\e[1;33m\]ssh\[\e[m\]\[\e[0;37m\]: ' # WY SSH
PS1='\[\e[0;37m\]: \[\e[1;33m\]\W\[\e[0;37m\] :\[\e[0;37m\]:\[\e[1;33m\]ssh\[\e[m\]\[\e[0;37m\]: ' # SY SSH
# PS1='\[\e[0;37m\]: \[\e[1;35m\]\W\[\e[0;37m\] :\[\e[0;37\m]:\[\e[1;33m\]ssh\[\e[m\]\[\e[0;37m\]: ' # PY SSH
# PS1='\[\e[0;37m\]: \[\e[1;33m\]\W\[\e[0;37m\] :\[\e[0;37m\]:\[\e[1;33m\]ssh\[\e[m\]\[\e[0;37m\]: ' # EeePC SSH
elif [[ ${EUID} == 0 ]]; then ## :root: ~ :
# PS1='\[\e[0;37m\]:\[\e[1;32m\]\u\[\e[0;37m\]:\[\e[0;37m\]: \[\e[1;92m\]\W \[\e[0;37m\]:\[\e[m\] \[\e[0;37m\] ' # WY root
PS1='\[\e[0;37m\]:\[\e[1;34m\]\u\[\e[0;37m\]:\[\e[0;37m\]: \[\e[1;34m\]\W \[\e[0;37m\]:\[\e[m\] \[\e[0;37m\] ' # SY root
# PS1='\[\e[0;37m\]:\[\e[1;35m\]\u\[\e[0;37m\]:\[\e[0;37m\]: \[\e[1;35m\]\W \[\e[0;37m\]:\[\e[m\] \[\e[0;37m\] ' # PY root
# PS1='\[\e[0;37m\]:\[\e[1;33m\]\u\[\e[0;37m\]:\[\e[0;37m\]: \[\e[1;33m\]\W \[\e[0;37m\]:\[\e[m\] \[\e[0;37m\] ' # EeePC root
else ## : ~ :
# PS1='\[\e[0;37m\]: \[\e[1;32m\]\W\[\e[0;37m\] :\[\e[m\]\[\e[0;37m\] ' # WY user
PS1='\[\e[0;37m\]: \[\e[1;34m\]\W\[\e[0;37m\] :\[\e[m\]\[\e[0;37m\] ' # SY user
# PS1='\[\e[0;37m\]: \[\e[1;35m\]\W\[\e[0;37m\] :\[\e[m\]\[\e[0;37\m] ' # PY user
# PS1='\[\e[0;37m\]: \[\e[1;33m\]\W\[\e[0;37m\] :\[\e[m\]\[\e[0;37m\] ' # EeePC user
fi
## :root: ~ :ssh:
#PS1='\[\e[0;37m\]:\[\e[1;34m\]\u\[\e[0;37m\]:\[\e[1;34m\] \W \[\e[0;37m\]:\[\e[m\]\[\e[0;37m\]\[\e[1;33m\]ssh\[\e[0;37m\]: ' # SY root
## :root:: ~ :ssh:
#PS1='\[\e[0;37m\]:\[\e[1;34m\]\u\[\e[0;37m\]:\[\e[0;37m\]: \[\e[1;34m\]\W \[\e[0;37m\]:\[\e[m\]\[\e[0;37m\]\[\e[1;33m\]ssh\[\e[0;37m\]: ' # SY root
## :root:: ~ ::ssh:
# PS1='\[\e[0;37m\]:\[\e[1;34m\]\u\[\e[0;37m\]:\[\e[0;37m\]: \[\e[1;34m\]\W\[\e[0;37m\] :\[\e[m\]:\[\e[m\]\[\e[0;37m\]\[\e[1;33m\]ssh\[\e[0;37m\]: ' # SY root
Last edited by MoonSwan (2014-11-19 09:23:02)

jasonwryan wrote:So it works for root locally, just not when you SSH in as root or change to root in an SSH session?
Yes, you're quite correct.
jasonwryan wrote:Also, it might help if you remove the commented lines, it is pretty hard to work out what is going on in there...
I agree and I found a bunch of \'s that I missed. Sorry about that!
Here's the config stripped of extraneous junk:
if [[ -n $SSH_CLIENT ]]; then
PS1='\[\e[0;37m\]: \[\e[1;32m\]\W\[\e[0;37m\] :\[\e[0;37m\]:\[\e[1;33m\]ssh\[\e[m\]\[\e[0;37m\]: ' # WY SSH
elif [[ ${EUID} == 0 ]]; then ## :root: ~ :
PS1='\[\e[0;37m\]:\[\e[1;32m\]\u\[\e[0;37m\]:\[\e[0;37m\]: \[\e[1;92m\]\W \[\e[0;37m\]:\[\e[m\] \[\e[0;37m\] ' # WY root
else
PS1='\[\e[0;37m\]: \[\e[1;32m\]\W\[\e[0;37m\] :\[\e[m\]\[\e[0;37m\] ' # WY user
fi
Edit: stripped out two comments I'd missed earlier.
Last edited by MoonSwan (2014-11-19 08:27:27)

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[Solved] Bash: Want to supress output but still have it recorded

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