bash

This option will search in the filename for two occurances of character “e” ls | grep "e\{2\}" This option will search in the filename for whitespace characters including tabs, pagebreaks, space and others. ls | grep "\s" Use a plus modifier to look for more than one occurances.

Installing and maintaining software packages sudo apt-get install packagename To find the name of package and to uninstall it, Go to software center and search for the application Scroll down to “Version” the packagename is the part before the first space in the Version.