apt-get update(root use only)
apt-cache search openssh-server
apt-get install(-y) openssh-server
apt-get remove(--purge) software
dpkg -l php ->print things about php installed
-rwxrwxrwx '-' on behalf of normal file
chmod 774 dirname(x=>1,w=>2,r=>4)
mkdir -p 1/2/3/4/5
chmod -R 777 dirname/
rm -rf *
cp -r(directory) old new(rename able)
mv old new(renameable)
ctrl+c,ctrl+d,q,exit
mkdir 2016-{1..12}-{1..31}
vim emacs
i=>INSERT before
a=>INSERT after
:set nu line number display
yy=>copy
p=>plaste
u=>withdraw
d=>delete
O=>previous line INSERT
o=>next line INSERT
x=>delete single char
(0,6) to the head of current line
$ to the end of current line
gg to the head of the document's first line
G to the head of the document's last line
