[jmiserez]

If you don't want to install a "real" solution like Snoopy Logger that works for all users/shells/edge cases, you could always adapt the bash prompt to write the command out. E.g. I personally use something like this in my .bashrc which logs everything per user, but you could easily adapt this to post to Slack instead:

    # Adapted from https://unix.stackexchange.com/questions/207813/how-to-log-every-command-typed-into-bash-and-every-file-operation
    export ETERNAL_AUDIT_LOGFILE=~/.bash_eternal_auditlog
    PROMPT_COMMAND='RET_VAL=$?; history -a; echo "$(who am i | sed -e "s/[[:space:]]\+/ /g") [$$]: $(history 1 | sed "s/^[ ]*[0-9]\+[ ]*//" ) [$RET_VAL]" >> $ETERNAL_AUDIT_LOGFILE'

Output including return code and all parameters:

    ubuntu pts/0 2016-01-22 13:24 (example-loggedinuser-rdns.yourisp.com) [4379]: [2016-01-22 13:25:37] ps aux | grep python [0]

If you assume no malicious users this will work just fine.

[tinco]

I've looked into both Snoopy and a bash script as you said. They both have merits, but I think for it to be really reliable there's no better way than to just log keyboard input. Assuming there are malicious users for me is a big part of the motivation.