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Shell

Getting Started​

We highly recommend you to use a modified shell (Oh my Zsh) to maximise your experince usig the shell.

Get current user​

whoami

Show current folder content, file sizes & permissions​

ll -lha

Get IP address​

# MacOS
ifconfig | grep "inet " | grep -v 127.0.0.1

Generate SSH key​

# This generates a new ssh key which will be stored in your ~/.ssh/ folder.
# Hint: you will be asked if you want to set a passphrase aka. a password for your ssh key which you will be asked everytime you use it. This is optional.
ssh-keygen -t rsa -C "your_email@example.com"

# Show your ssh (public) key
cat ~/.ssh/id_rsa.pub

Create new aliases aka create your own commands​

# Edit your ~/.bashrc or ~/.bashrc
nano ~/.zshrc

# Add a line similar to this one
alias my_super_cool_command="echo \"super cool command\""

# Source your config file to apply changes
source .zshrc

Work with .tar archives​

List all top level contents of tar file​

tar --exclude="*/*" -tf file.tar

Extract to current folder​

tar -xf archive.tar.gz

Hint: The -v option (e.g.-xvf) will make the tar command more visible and print the names of the files being extracted on the terminal.

Extract to specified folder​

tar -xf archive.tar.gz -C your_super_cool_folder

tmux​

tmux is a terminal multiplexer. It lets you switch easily between several programs in one terminal, detach them (they keep running in the background) and reattach them to a different terminal.

Installation​

sudo apt-get install tmux

Manage tmux sessions​

Start new session​

tmux

Create session with a name​

tmux new -s super_cool_session_name

View all running sessions session​

tmux ls

Attach to session​

tmux attach -t super_cool_session_name

Exit from session (without killing the session)​

Press CTRL + B, now enter d (or :detach) and press ENTER.

Kill tmux server & all running sessions​

tmux kill-server