====== Linux Console Tips & Tricks ======

===== Determining the public ip address =====

<code bash>
dig +short myip.opendns.com @resolver1.opendns.com
# or
dig TXT +short o-o.myaddr.l.google.com @ns1.google.com
</code>

Store it in a shell variable
<code bash>
myip="$(dig +short myip.opendns.com @resolver1.opendns.com)"
echo "My WAN/Public IP address: ${myip}"
</code>
[[http://www.cyberciti.biz/faq/how-to-find-my-public-ip-address-from-command-line-on-a-linux/]]

===== vim editor =====

vim cheat sheet [[http://vim.rtorr.com/]]

''I'' - start editing in Insert mode\\
''R'' - start editing in Overwrite mode\\
''Esc'' -  Leave editing\\
'':'' - Goto Command mode\\
''yy'' - Copy (yank) a lines into buffer\\
''dd'' - Cut a lines into buffer\\
''P'' - Insert buffer into current position\\

__In command mode (:)__

''/'' - Search\\
''w'' - write file\\
''q'' - quit VI\\
''q!'' - quit VI discarding the changes made\\