A collection of useful terminal commands to use in linux.

useful-linux-commands.txt

//Check if packages are installed
dpkg --get-selections | grep [package_name]

//Show a list of files and directories in the current directory.
ls

//Show file permissions 
ls -l /avr/www/html/index.php

//Edit a file
nano /var/www/html/file-name.php



/********************************
  *** Directories ***
********************************/
//Copy a file
cp file-name copied-file-name

Copy a directory
cp -r folder copied-folder

//Move or rename a file
mv: The mv command will move a file to a different location or will rename a file. Examples are as follows: "mv file foo" will rename the file "file" to "foo". "mv foo ~/Desktop" will move the file "foo" to your Desktop directory, but it will not rename it.

//Delete a file
rm file.txt

//Delete an empty directory
rmdir folder-name

Delete directory and all files/folders in it
rmdir -r folder-name

//Create new directory
mkdir directory-name