A co-worker was seeing an exception: -
line 8: TMOUT: readonly variable
when trying to SCP a file from a remote Linux box.
I did some digging and found a RedHat article: -
Why does it prompt "bash: TMOUT: readonly variable" when sudo'ing or ssh'ing to the system?
that said, in part: -
The TMOUT variable is usually defined read-only to avoid users from unsetting or modifying its value. Due to this it's not possible to set it twice.
I reproduced the problem on my Ubuntu 18.04 box: -
-bash: TMOUT: readonly variable
with a pair of scripts: -
The first script: -
cat /etc/profile.d/a.sh
readonly TMOUT=500; export TMOUT
sets TMOUT as readonly
The second script: -
cat /etc/profile.d/b.sh
TMOUT=600; export TMOUT
then tries to override it
which I validated: -
fgrep -R TMOUT /etc/profile.d/
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