Previous Directory Hop
cd -
Command Search History
ctrl + r <type command>
Remove Programs from Linux
list all programs
dpkg --list
after confirming it exists delete it
copying a whole directory:
`How about copying a directory?
$ cp -vr dir_A dir_A_copy` Linux Command Hints
sudo apt-get remove "<itemname>"
completely remove it with
sudo apt-get purge "<itemname>
clean after the mess
$ sudo apt-get autoremove