I logged into an Ubuntu 18.04.6 LTS box and noticed that my Bash history was completely and utterly gone.
Having typed the command: -
I got absolutely nothing back.
Knowing that the command really just outputs the content of the ~/.bash_history file, I checked that out: -
ls -al ~/.bash_history
-rw------- 1 root root 9007 Mar 20 13:39 /home/hayd/.bash_history