Working as a programmer, your should be using terminal commands at some point in your day.

Here's a list of some useful terminal commands to speed up your work.

The Basics

Lets recap the basics that everyone should be familiar with.

mkdir NAME
..
cd NAME
..
touch file.txt
..
echo "some text..." > file.txt
..
ls -lah
..
cat file.txt
..
cp path/from path/to
..
rm -rf path/to/file.txt
..
clear

Use touch to create a new file or update a file's date/time.

And echo "some text..." > file.txt to write data to that file.

Use ls to list files, add the -lah to get hidden files and file sizes in a human format.

Use cat to get the contents of a file, for large files your better off using tail.

Copy a file with cp, adding from location and to location.

Delete a file with rm -rf, add the flags to do it forcefully and recursively.

To much info, clear the screen with clear. OSX users can use CMD+K, works also.

Tail

tail -n 100 path/to/file.txt
tail -f path/to/file.txt

Delete a process

ps aux
kill -9 PID

Once you have the PID, use kill -9 to stop that process immediately. If your wondering why -9, stackoverflow.com/a/9951578 .

The Magic of GREP

Grep is useful for filtering output to only get what you need. It is an incredible powerful tool.

ps aux | grep node
ls -l | grep Oct
...
cmd | grep WHAT

With grep, you can also filter thru entire directories using grep -r 'text_goes_here' path_goes_here to find that one file your looking for.

Need to exclude files? Use --exclude={*.zip,*.txt}.

Or try grep -rnw . -e 'text_to_find to find files.

Read the manual (gnu.org/software/grep/manual/grep.html ) for all the details.

Compressing Files (.zip

zip -r package.zip . -x "*.DS_Store"

tar cfv filename.tar *

tar is similar when zip is not installed.

directory loops

With a for loop, you can apply a command to a list files.

for i in *; do echo "cmd ${i}"; done;

Replace the do echo "cmd ${i}" with anything you want.

Connection snitch

lsof -i | grep -E "(LISTEN|ESTABLISHED)"

Networking Help

ping remoteserver
ifconfig

Aliases in zsh

vi .zshrc
...
alias ll='ls -lsha'

printfn() { echo $1 }

And if you can't remember something, use history to get past commands and !LINE to recall one.