Basic Linux shell commands for new users

touch a.txt (to create a new blank file)
ll (to list all the files in this folder)
ll | grep john (to filter the files matching the pattern – john – in this case)
ll | grep tac

chmod 0777 test_file (to make the file fully writable for all users – not recommended for production environment)
chmod 0777 test_folder (if this is a folder, then the permissions are set for this particular folder only)
chmod -R 0777 test_folder (Applies the permissions to all the folders and sub-folders inside this folder)


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