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up vote 4 down vote favorite

We have here a read only Bash variable. I am not allowed to unset that variable.

$ echo $TMOUT
1800

As a workaround I wrote those lines (that my session don't exit)

#!/usr/bin/perl

$|++;
while (1) { print "\e[0n"; sleep 120; }

Is there an official package (rpm) that does similar (like above Perl code) in a CentOS7/RHEL7 repository? I don't like to open up a vim editor, I wish a command.

share|improve this question
    
Usual solution to this is just run cat when stepping away from your session. And then ^C it on your return. – steve Aug 10 '15 at 14:36
    
I imposed a similar rule because I had people in my team that left terminals open for weeks in a row. Whilst I do agree 1800 is kinda of low, it must be there for some reason. People tend to notice deviations to the usual...yours sessions will stand out like a sore thumb. – Rui F Ribeiro Jan 29 '16 at 9:04
up vote 3 down vote accepted

You can issue perl commands from the command line...

perl -e '$|++; while (1) { print "\e[0n"; sleep 120; }'

or you could do the same in shell (a sh/bash example):

while sleep 120; do printf '\33[0n'; done

Or you could use watch:

watch -n 120 printf '\33[0n'

share|improve this answer
up vote 4 down vote

Add this to the start of your .bash_profile ?

if [ ! -z "$TMOUT" ]; then
  env -i bash --init-file ~/.bash_profile
fi

Beware the wrath of the sysadmins if you leave a gazillion old sessions running as a result of defeating their timeout rulings.

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up vote 0 down vote

Why aren't you switching to non-interactive session?

# TMOUT=0
-bash: TMOUT: readonly variable
# unset TMOUT
-bash: unset: TMOUT: cannot unset: readonly variable
# su
# export TMOUT=10
# unset TMOUT
#
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