List Only Hidden Files
ls -ld .??*
Remove Large Number Of Files
find . -name "*" -print0 | xargs -0 rm -r
Remove Line From File By Line Number
sed -i.bak -e '12d' file.txt
Rsync Over SSH
rsync -avz -e ssh /path/to/local_file user@remote_server:/path/to/upload_to
Server Current Directory Over HTTP
python -m SimpleHTTPServer 8000