Posts tagged history

proper bash history logging

posted on 2016-09-14 23:32

By appending these to your .bashrc:

HISTTIMEFORMAT="%s "
PROMPT_COMMAND="${PROMPT_COMMAND:+$PROMPT_COMMAND ; }"'echo $$ $USER "$(history 1)" >> ~/.bash_history2'

you get a proper history looking like that from all shells connected to a server for each individual user:

root@fahi:~# cat .bash_history2
2786 root    91  1473887187 echo test
2786 root    92  1473887262 l
2786 root    93  1473887267 rm .bash_eternal_history 
2806 root    98  1473887148 tail -f .bash_eternal_history 
2806 root    99  1473888769 cat .bash_history2
2806 root   100  1473888788 lsblk
2821 root    98  1473887148 tail -f .bash_eternal_history 
2821 root    99  1473888794 history 
2821 root   100  1473888809 cat .bash_history2
2835 root   102  1473888809 cat .bash_history2

From the first look it looks good so far, but I fear there is some testing due to make sure there are no bad edge cases. One that I've found so far, was the last command gets repeated on login, maybe, and also when ctrl-c'ing commands. But this could have been the cause due to different shells being active with and without the prompt_command.

More alternatives can be found here.

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