Linux Permissions on External Disks

When using Linux with external disks, sometimes you may find that you do not have permission to read the disk.

To gain permission to access a directory and its files, you can use the command

sudo chown -R username: file_path_of_directory

where username is your username, and file_path_of_directory is the file path of your directory at its mount point, usually something like /media/diskname (where diskname is the name or label of the disk).

How to Find Your Linux Kernel Version from the Command Line

A handy way of finding out your current Linux kernel version (i.e., your current Linux operating system release number) from the command line is to use the command uname -r.