$ sudo apt-get remove gexec 

Uninstall gexec including dependent package

If you would like to remove gexec and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove gexec 

Use Purging gexec

If you use with purge options to gexec package all the configuration and dependent packages will be removed.

$ sudo apt-get purge gexec 

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 gexec 

See Also,