Monday, 21 March 2022

Bash and history - where's it gone ?

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: -

history

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

Notice that my user name is hayd ....

Also notice the user/group ownership of the file .... root ....

I changed the ownership of the file: -

sudo chown hayd:hayd ~/.bash_history

[sudo] password for hayd: 

and logged out and back in again ...

And now I have my history back ...

...
  348  ~/upgrade.sh 
  349  which podman
  350  apt-get install -y podman
  351  ~/upgrade.sh 
  352  ~/createHelloWorld.sh 
  353  history 
  354  lsb_release -a
...

Also, as mentioned elsewhere, I use an alias - hist - to output history without line numbers: -

alias hist='history | cut -c 8-'

...
~/upgrade.sh 
which podman
apt-get install -y podman
~/upgrade.sh 
~/createHelloWorld.sh 
history 
lsb_release -a
...

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