Mac terminal command in my flavor

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why you need to learn? Because mastering command line will make you like a Hacker.

Command line is case sensitive and require file extension. A command line includes Command Name –Options Arguments Extras. Each word is separated by space. Either absolute path or relative path is OK.

cheatsheet: https://github.com/0nn0/terminal-mac-cheatsheet

my frequent usage

command	function	note
say “hello”	Pronounce
sleep 600 && say “hello”	A timer for 600s and alarm
type coomandName	tell it’s internal or external command
man commandName	Open manual for the command name	Q to quit
man –k keyword	open all manual with certain keywords
pwd	print working directory
ls	list directory content	similar to dir
cd	change directory
cd /	go to root directory
cd ~	go to user directory
cd ..	go to upper directory
cd first letter+	auto complete the whole folder name
ls -a	list hidden folder
ls -la	list hidden folder and files
cat	concatenate
less
which command name	location of command
whereis command name	location of command
* ? []	wildcard characters
mk dir, cp, mv, rm	make directory, copy,move, reomve
vi	visual text editor
nano	nano text editor (much better)
open .	use Finder to open current directory
history	see what you have input
ctr+ L	clear screen
ctr+ C	stop current execution
echo string	print string
alias string=”command name”	make alias for command
su	substitute user

install software

Homebrew is the most powerful package manager:

‘/usr/bin/ruby -e “$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)”’

Then you can use brew install or brew cask install to install many softwares
- Dash: collection of all documentation
- cheatsheet: shortcut anytime

Directory structures in Mac HD

4 visible file folders under root
1. Applications: for software
2. System: /library/…
3. Library: has Dictionaries, desktop picture, documentation, Favorites, Fonts, iTunes, Java Mail, preferences, etc
4. User: / yourname/Desktop, Download, Library, Documents, Application

Hidden file folders:
• bin
• cores
• dev
• home
• net
• Network
• private
• sbin
• usr
• Volumes
• files: etc, var, tmp

⌥ is alt (option), imagine it as a track changing switch
^ is control
⇪ Capslock
⇧ Shift

other

convert MS table to MD table http://www.tablesgenerator.com/markdown_tables
write MD in MS word: http://www.writage.com/

Reference:
http://xiaolai.li/2016/06/16/makecs-basic-dev-env-settup/
https://developer.apple.com/library/mac/documentation/OpenSource/Conceptual/ShellScripting/CommandLInePrimer/CommandLine.html
https://www.renfei.org/blog/mac-os-x-terminal-101.html