Cheat Sheet of basic Unix- Linux commands

Command Description
ls Lists all files and directories in the present working directory
ls – R Lists files in sub-directories as well
ls – a Lists hidden files as well
ls – al Lists files and directories with detailed information like permissions, size, owner, etc.
cat > filename Creates a new file
cat filename Displays the file content
cat file file2 > file3 Joins two files (file1, file2) and stores the output in a new file (file3)
mv  file “new file path” Moves the files to the new location
mv filename new_file_name Renames the file to a new filename
sudo Allows regular users to run programs with the security privileges of the superuser or root
rm Deletes a file
man Gives help information on a command
history Gives a list of all past commands typed in the current terminal session
clear Clears the terminal
mkdir Creates a new directory in the present working directory
mkdir Create a new directory at the specified path
rmdir Deletes a directory
mv Renames a directory
pr -x Divides the file into x columns
pr -h Assigns a header to the file
pr -n Denotes the file with Line Numbers
lp -nc
lpr c
Prints “c” copies of the File
lp -d lp -P Specifies name of the printer
apt-get Command used to install and update packages
mail -s ‘subject’ -c ‘cc-address’ -b ‘bcc-address’ ‘to-address’ Command to send email
Mail -s “Subject” to-address < Filename Command to send email with attachment

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