Explanation of the flexibility and efficiency of Rsync

When Rsync is used, automatic backup and integrity check can be combined. For example, use an automatic backup tool to back up the entire system and create a background daemon before the inin backup to complete the integrity check and redirect the output to a log file.

To back up the entire file system, you only need to detect some files that have not been changed. For example, if you need to back up the system files to the root directory, but the audit process of Integrity Detection misses some directories, and the contents in these directories have undergone regular changes, such as/home And/var. In this case, if the audit program of the file system is always too enthusiastic to check every file, the result will often lead to a high efficiency reduction in system backup.

If you are full of imagination and active in thinking, you can try to write a script program and run it on the background daemon. During the first integrity check, the system is allowed to run the backup program only when no errors are found during the integrity test. Then, check the log files generated by the integrity check. If no errors are found, you can select a relatively idle period to run the system backup program. In general, it is best to run the system backup program after completing the integrity check process and the automatic audit program does not find any modified files. Shell scripts are very powerful, but have the ability to write shell or Perl scripts. It is necessary for a Linux system administrator and is often used. Moreover, it is not difficult to learn to write shell or Perl scripts.

In Rsync, automatic file backup is quite simple, which is exactly the motivation and goal of Rsync tools. However, rsync also has many other functions. For example, you can use rsync to complete File System Integrity Detection, which is also an example of the flexibility of the tool provided by Linux. Linux provides many gadgets, and each tool can perform a certain kind of operations very well. This is exactly the difference from those large programs. A large program always tries to solve all the problems, but the final result is often not ideal. In addition, these gadgets are very flexible to use, and users can combine them as needed to complete some relatively large and complex tasks. For example, rsync can be used to encrypt and compress data transmitted over the network through SSH. You only need to enter a simple command line to greatly improve data security and system security. In short, rsync is easy to use and is recommended. Rsync is a versatile and efficient security protection tool for experienced system administrators.