Find and chmod files or folders
find . -type d -exec chmod 755 {} \;
find . -type f -exec chmod 644 {} \;
Find a directory and display on screen
find . -type d -name 'linux' 2>/dev/null
Find/Grep for a string across multiple files with different extensions
find . -name "*.php" | xargs grep -niP 'thingy'
find \( -name "*js" -o -name "*jsp" -o -name "*jspf" \) | xargs grep -niP 'thingy'
Find and replace
find . -type f -name "*.php" -exec sed -i 's/numRows/rowCount/g' {} \;
running as background process
nohup scp <params> & > nohup.out 2 > &1
nohup scp -r -p root@www.example.com:/var/www/ /var/www/ & >nohup.out 2>&1
nohup scp -r -p root@www.example.com:/var/www/logs /var/www/ & >nohup.out 2>&1
Copying an image file to USB
cat file.iso > /dev/sdb
sync
Killing
killall -9 nginx
Mounting an imge file
mount -o loop file.img /mnt/image
Creating a file stsyem
mkfs.ext2 /dev/sdb2
Labeling a file system
e2label /dev/sdb2 RoboTamer
Searing bash history
history | grep -i "search term"
Debian Specific
See what is installed
dpkg -l | grep php5
Start a program
service program_name start
Stop a program
service program_name stop
Start a programs at boot time
insserv -d program_name
Remove program from boot time
insserv -r program_name
