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How do I back up Linux OS? This problem may be often seen in our daily study or work. I hope you can gain a lot from this question. The following is the reference content that the editor brings to you, let's take a look at it!

One: system image backup

1. Purpose of system backup

System backup is a backup on PC, backing up the entire server environment, such as system files, startup files, program files. When the server fails, system backup is necessary in order to recover in time.

two。 System backup method

There are two types of online backups. The first offline backup is performed when the server is stopped. When the server is stopped, the data can be easily and reliably completed because the backup at that time is obtained. This does not cause data corruption, but because the server is stopped, the user cannot use the server during the backup.

Another online backup is one that is performed when the server is started. Contrary to offline backup, the advantage of online backup is that users can also use the server during backup, and on the other hand, because the server is backed up in a state that has not been stopped, there is also some data or can not be sure to backup at any time, that is, the data cannot be corrupted.

To perform a system backup, use the command "dump".

Second: data backup method

There are three methods of data backup: full backup, differential backup and incremental backup.

1. A full backup is to back up all the data at a time, because the method is simple, so it is easy to perform. Even during a restore, you can easily use one of the data obtained from the latest full backup. On the other hand, the disadvantage is that the amount of data to be backed up is large and the backup takes time.

two。 Differential backup

After completing the first full backup, only files that have been changed from a full backup are backed up, which has the advantage of reducing the amount of data to be backed up and backup time compared to a full backup.

3. Incremental backup

Incremental backups are the same as differential backups before the first full backup. Most importantly, a differential backup always backs up the difference between a full backup and a full backup, while an incremental backup backs up only files that have changed since the last backup.

Thank you for reading! After reading the above, do you have a general idea of how to back up Linux OS? I hope the content of the article will be helpful to all of you. If you want to know more about the relevant articles, you are welcome to follow the industry information channel.

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