GRANDPERSPECTIVE HIGH SIERRA HOW TO

You could give Bob the root password, but you don’t want him being able to do everything, just run the backup.Įnter the sudo command. He wouldn’t normally be given read access to other user’s files, and maybe also excluded from reading certain administrator files (like /etc/shadow that contains the passwords). Imagine if Bob was given the task to make backups. Sometimes, certain users need to do something they’re not normally allowed to do. (Well it spawns a shell making you superuser) The su command logs you in as the superuser. Basically, root can do anything on the system. User 0 is usually known as root or the superuser. In traditional Unix, each user has a digital user ID. Yes, you can destroy your computer with sudo. You just need to 'su ' before you use “sudo”. In Terminal (or iTerm2), you just need to “su adminusername” before you use “sudo”. If you see the “Username is not in the sudoers file' message it means you are a non-admin user, which is usually good. If you can learn this you will be surprised how much you can do.

GRANDPERSPECTIVE HIGH SIERRA HOW TO

Learn how to transfer files back and forth between servers with scp. Learn how relative vs absolute paths work ('/' vs everything else). If you are going to do system admin type stuff you’ll need to learn how to use vi a little (how to enter edit mode, exit edit mode, quit without saving, and saving and quitting). But you can also over write files with mv and cp. Obviously rm is where you can do the most damage. Learn how to navigate the file system (cd), look for files (ls, find), view them (cat), edit them (nano or download the micro text editor), move them (mv), copy them (cp), delete them (rm), change permissions (chmod and chown), and check to see where you are (pwd or cwd). I would find things you normally do with the Finder and slowly learn how to do them with the Terminal.

Grandperspective high sierra