alaahd

//Ignoring modifications to tracked files
git update-index --assume-unchanged FILENAME

//undo
git update-index --no-assume-unchanged FILENAME

alaahd

# The loopback interface
auto lo
iface lo inet loopback

# Configuration for eth0 and aliases

# This line ensures that the interface will be brought up during boot.
auto eth0 eth0:0

# eth0 - This is the main IP address that will be used for most outbound connections.

alaahd

//remove deleted files from the index (unstage) 
git ls-files -d | xargs git rm --cached

alaahd

rsync -vrz --ignore-existing --size-only -e "ssh -i /Users/mark/id_rsa-readonly" readonly@1.1.1.1:/var/www/project/images/2012 /var/www/project/images/

//note the the source has no trailing slash
// target has a trailing slash 

alaahd

AuthType Basic
AuthName "a"
AuthUserFile "/home3/amcsycom/.htpasswds/public_html/wp-admin/passwd"
require valid-user

alaahd

wget -r ftp://username:password@ftp.hostname.com/public_html/

alaahd

mysqldump --user=wikiadmin --password --host=db.mywiki.com wikidb > wikidb.sql

alaahd

#Recursive 
scp -r local-folder-name username@hostname:public_html/wp-content/plugins/

alaahd

Clearing cache, won't flush image styles: http://drupal.org/node/997332

You could:

delete them manually
use image_style_flush
use the command line: rm -rf sites/default/files/styles
use drush: drush image-flush

alaahd

ssh -D 8080 -C -N username@example.com