Merge pull request #137 from ImmortalPC/master

(add) AsciiArt, (change) find
Added cheat sheet for irssi
Merge pull request #138 from fuzzgun/master

Added cheat sheet for irssi
Merge pull request #139 from ImmortalPC/master

[Git:change] Add a command to show a file as it appeared at <commit id>.
adds how to wget a file into a specific directory
Merge pull request #140 from marlonlandaverde/wget-into-directory

Adds how to wget a file into a specific directory
add cheat sheet for journalctl
Merge pull request #145 from davem2/journalctl

add cheat sheet for journalctl
[TAR] Add a new command in tar