Clone or download somewhere and source bash-eternal-history.sh on your ~/.bashrc.
This is a possible way to do it:
$ git clone git@github.com:ateijelo/bash-eternal-history.git
$ cd bash-eternal-history
$ echo "source \"$PWD/bash-eternal-history.sh\"" >> ~/.bashrcAfter installation, you just need to start a new shell and every command will be
logged twice to ~/.bash_eternal_history, one time before running the command
and a second time after the command is done.
This is useful to investigate how long a command took to complete. If you'd rather have it logged once, check the variables at the beginning of the code.