Linux commands and shell scripting notes-P1
Useful Linux commands
- How many users are logged in:
who - Who is the current user:
whoami - Print the date:
date - Show calendar:
cal - Print working directory:
pwd - Print files and directory of the current directory:
ls - Manual help:
man whoami - Create a new directory:
mkdir directoryname - Create a new empty file:
touch filename - Remove a directory:
rmdir directoryname - Remove a file:
rm filename - Remove a directory and its content:
rm -r directoryname - Display list of available commands:
help - Clear terminal:
clear, ctrl+l - Exit session: “exit`
- Display date:
date - Display time:
time - Print information:
hello - Increase the font size:
Ctrl, shift and + - Print 5 random numbers between 1 and 100:
shuf -i 1-100 -n 5 - Creating file using the
shuf command: touch dir$(shuf -i 1-10 -n 1)/sunny.txt - Simple user:
$ prompt - Root user/admin:
# prompt - Switch from simple user to root user:
sudo -i - Switch from root to simple user:
exit