You can uninstall or removes an installed krb5-user package itself from Ubuntu 12.04 LTS (Precise Pangolin) through the terminal,
$ sudo apt-get remove krb5-user
If you would like to remove krb5-user and it's dependent packages which are no longer needed from Ubuntu,
$ sudo apt-get remove --auto-remove krb5-user
If you use with purge options to krb5-user package all the configuration and dependent packages will be removed.
$ sudo apt-get purge krb5-user
If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.
$ sudo apt-get purge --auto-remove krb5-user
I'm very pleased to share my working experience in the Linux field and have posted articles in this website — bits and pieces learned throughout my career.
