Laruence private kitchen 23-24xwindows and backup

These two chapters are not closely related to yourself, so no in-depth research has been conducted. I just read it again and noted it down.

1. X Windows is mainly divided into two parts: X server and X client

X server: Hardware Management, screen drawing, and font Functions

X client: handles the "events" required by X Server. The main task of X client is to process the action from X Server, process the action as drawing data, and then send the drawing data back to X Server.

2. X Windows Manager: Special x client, responsible for managing all X clients.

Backup in Linux

1. problems that cause system damage:

(1) Hardware problems

(2) software problems

2. Backup-accumulative backup: After the system completes the first full backup, after a period of operation, compare the differences between the system and the backup files, and only backup documents with differences.

When restoring a cumulative backup, you need to restore the original backup first, and then restore it gradually until all the documents are restored.

You can run the dump command to directly accumulate backups.

3. Differential backup of complete backup: Each backup is compared with the original full backup.