Useful terminal commands for Mac.

Terminal Commands

In the words of the great Willie Wonka:

A little nonsense now and then is relished by the wisest men.

A collection of useful terminal commands:

// remove all node_modules from a folder
for package in `ls node_modules`; do npm uninstall $package; done;

// Keep mac awake until app is idle
caffeinate -i open -W -a iMovie.app

// Show hidden files (FALSE to hide)
defaults write com.apple.finder AppleShowAllFiles TRUE

// Create textfile of directory and all sub-directories (use .csv to maked a CSV)
ls -R /DIRECTORY > file-name.txt

// Find the PID running on port 3000
lsof -wni tcp:3000
//kill that process
kill -9 PID

// Compress Image using Imagemagick
convert -strip -interlace Plane -quality 85% source.jpg result.jpg

// Compress all subdirectories into their own .zip
for i in */; do zip -r "${i%/}.zip" "$i"; done

// Restart Wireless Networking (use en0 for Ethernet)
As Sudo:
ifconfig en1 down
ifconfig en1 up

// Convert ISO to DMG
hdiutil convert /path/imagefile.iso -format UDRW -o /path/convertedimage.dmg

// Restart OS X UI
sudo killall -HUP WindowServer

// Generate a gif from a mov with ffmpeg
ffmpeg -i video.mov -pix_fmt rgb24 output.gif

// Reduce the frame rate and size. Set the start time and duration
ffmpeg -ss 00:00:00.000 -i video.mov -pix_fmt rgb24 -r 10 -s 320x240 -t 00:00:10.000 output.gif

// Optimize gif with ImageMagick
convert -layers Optimize output.gif output_optimized.gif

// Optimize gif with gifsicle
gifsicle -O3 output.gif -o ouptput-optimized.gif

# Moving the cursor – fast
CTRL+a         Go to the beginning of the line (same as Home)
CTRL+e         Go to the End of the line (same as End)
ALT+b / ESC+b  Go one word back (to the left)
ALT+f / ESC+f  Go one word forward (to the right)

# Moving the cursor – one character at a time
CTRL+f         Go forward one character
CTRL+b         Go backward one character

# Using history
CTRL+r         Backwards search in previously executed commands (history)
CTRL+p         Previous command (same as Up arrow)
CTRL+n         Next command (same as Down arrow)

# Deleting whole words
ALT+Del        Delete the word before (to the left of) the cursor
ALT+d / ESC+d  Delete the word after (to the right of) the cursor
CTRL+w         Cut the word before the cursor to the clipboard

# Deleting parts of the line
CTRL+k         Cut the line after the cursor to the clipboard
CTRL+u         Cut/delete the line before the cursor to the clipboard

# Deleting single characters
CTRL+d         Delete character under the cursor (same as Delete key)
CTRL+h         Delete character before the cursor (same as Backspace key)

# Paste, Undo, revert, and more
CTRL+l         Clear the screen (similar to the 'clear' command)
CTRL+y         Paste the last thing to be cut (yank)
CTRL+_         Undo
ALT+r / ESC+r  Revert the changes and replace with the line as it was 
                in History.

# Swap 'em!
CTRL+t         Swap the last two characters before the cursor
ALT+t / ESC+t  Swap current word with previous
 
# Convert to UPPER, lower, or Sentence case
ALT+u / ESC+u  Capitalise characters from the cursor to the end of 
                the current word and move to the end of the word.
ALT+l / ESC+l  Lower the case of characters from the cursor to the
                end of the current word and move to the end of the word.
ALT+c / ESC+c  Capitalize the character under the cursor position 
                and move to the end of the word.

briannhinton/terminal-commands.md

Terminal Commands