Topic

Permissions

2 tutorials tagged Permissions.

Linux & the Command Line

sudo explained: the root user, sudoers and why you get "Permission denied"

What the root user is, why sudo replaced shared root passwords, how to check who you are with whoami and id, what /etc/sudoers does, and when not to use sudo.

12 Nov 2026 · Linux · Bash · sudo

Linux & the Command Line

Linux file permissions explained: ls -l, chmod and chown (with diagrams)

Read every column of ls -l, understand owner, group and others, and change permissions with chmod (symbolic and octal like 755, 700, 400) and ownership with chown. With diagrams and real terminal examples.

10 Nov 2026 · Linux · Bash · Permissions