Basics of Linux Learning ——————

A. Linux trial

1. Query with man or info

2. Super Simple text editor: Nano

3.sync; Data synchronously writes to disk, writes in-memory data to disk

3. The usual shutdown command: shutdown

/sbin/shutdown[-t seconds] [-ARKHNCFF] time [warning] Normal user shutdown requires root privileges

Two. File permissions

Log in to Linux as root and execute Ls-al

There's a whole lot of stuff going on.

The first column represents the type and permissions of the file

The first character indicates that the file is a directory, a file, or a linked file

d for Directory-link file for file l

After nine characters three a group representing the file owner permission with the user group permissions other sub-user group permissions

Basics of Linux Learning ——————