The superuser, root, is a powerful tool. Find out how to control access for safety and security.
- [Narrator] On all Linux systems,…there's a user called root…that acts as the super user.…That is, a user who's not constrained by any limitation.…Everything is visible to root.…And, unless the file's encrypted,…no file is out of root's reach.…Clearly it's a bad idea to always use the system as root.…So there's a tool called sudo…that lets us borrow root's power temporarily…in order to do system administration tasks.…Sudo doesn't have a strictly defined meaning,…but many people, myself included,…like to think of it as standing for super user do,…instead of doing something as a normal user.…
The pronunciation varies and some people say pseudo.…Not every user can use sudo.…During setup, the user we created was added…to a group of users called sudo,…that are granted the ability to use root's authority.…In general, users in groups allowed this privilege…are called sudoers.…And their access is listed in the /etc/sudoers file.…We'll take a look at that later on.…To use root's authority to do something,…we just write sudo…
- Exploring filesystems
- Installing Linux on a physical or virtual machine
- Working with files, directories, and links
- Finding files
- Handling input/output redirection
- Comparing text files and non-text files
- Compressing and decompressing files
- Configuring file permissions
- Managing the root account
- Accessing the command line remotely
- Transferring files
Skill Level Beginner
1. Install and Log Into Ubuntu
System documentation11m 21s
2. Working with Files in the Terminal
3. Security and Administration
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