Command	Action
whoami	Print your username
pwd	Print current working directory
cd name	Move to directory called name
cd ..	Move up one directory
mkdir name	Creates a directory called name
ls	List files in current working directory
ls -l	List files in current working directory (long format)
ls --help	Help for the ls command
man ls	Read the manual of the ls command. Quit by pressing Q
tree -L 2	Shows a file and directory tree of depth 2.
nano file	Opens a file called file in the nano editor. Save your edits with Ctrl+O and quit nano with Ctrl+X
cat file	Print the contents of the file called file to the terminal
mv from to	Move or rename a file called from to new location or name to
rm file	Delete a file called file
rm -rf dir	Delete director called dir and all files and subdirectories it contains. Be very careful with this!
wget url	Download the file specified by URL url and save it as a file
head -n 5 file	Shows the first 5 lines of file
tail -n 5 file	Shows the first 5 lines of file
less file	Read file interactively. Exit by pressing Q
python3 file	Run the python code in file with the Python interpreter
Rscript file	Run the R code in file with the R interpreter
javac files	Compile one or multiple .java source code files to .class bytecode files.
java ClassName	Run the program starting from the main method in class ClassName
command < file	Runs command and sends the contents of file to the standard in of that process as if someone was typing it into the terminal while that process is running.
crontab -e	Edit your user's cron table that specifies scheduled tasks
date	Prints the current date and time
tmux new -s name	Create a new virtual terminal session with name name
tmux	Create a new virtual terminal session
tmux ls	List existing tmux virtual terminal sessions
tmux detach or press Ctrl + B, then D	Detach from the current virtual terminal
tmux attach -t name	Enter the virtual terminal sessions called name
tmux kill-session -t name	Ends the virtual terminal session called name. This ends all programs running in it.
exit	Leaves the virtual terminal (if inside one). Closes the connection if you perform it in the shell directly.
htop	Check resource consumption. Press F10 or click F10Quit to exit.