Linux Cheatsheet

Why Use Command-Line when you have the option for GUI that is easy to navigate and control but at some point you may find yourself in one of the following points, there comes the Command-Line in the picture, Let's dig into it.

1. To automate the process.

2. To speed up the process.

3. While login to the server via ssh, Gui is not available, you have to work via command line.

Commands	Description
GENERAL
ls	list folder and files
history	shows previous commands
cd	Change directory
cd folder_name	relative path
cd /folder_name	absolute path
pwd	current working directory
ll	long list of a file and folder with permissions
man command_name	shows all the options and details of that particular command
chmod 666 file_name.extension	changes permission
cat file_name.extension | grep word	Pipeline used for multiple commands
FILES
touch	Empty file creation
nano file_name.extenstion	to open file in edit mode
sort file_name.extension	sort the content of the file
sort -r	sort file in reverse mode
head file_name.extension	Shows first 10 lines of the file
head -n 2 file_name.extenstion	Shows first 2 lines of the file
tail file_name.extension	Shows last 10 line of the file
tail -n 2 file_name.extenstion	Shows last 2 lines of the file
tail -f file_name.extension	moves file one step back
grep word	search element from a file
cat	to open file content
mv file_name.extension ..	moves file one step back
lsof	list of opened files
FOLDER
mkdir	create directory
rmdir	removes empty directory
rm -rf folder_name	removes folder with the content
TIME & DATE
date	shows the date
cal	shows the calendar
User
whoami	current user
su	Change user or substitute user
exit	log out of the user