What should I do if I accidentally destroy important programs or setup files?

Article Title: What should I do if I accidentally destroy important programs or setting files ?. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
· If one day you find that the music videos you commonly use to kill files cannot be executed, how can you reinstall the music video program?
1. First, use rpm-qf to find out which package the file belongs.
But the question is, how do you know the complete path of the normally used music video?
§ Commonly used commands are usually stored in/bin or/usr/bin.
§ Commands for management are usually placed under/sbin or/usr/sbin.
For the current example, first try/bin/mv or/usr/bin/mv (the bottom line is the input command ):
[Root @ linux: ~] Rpm-qf/bin/mv
Fileutils-4.1-4
2. delete/bin/mv or replace it with another file. Otherwise, if an object already exists (whether the content is correct or not) during the re-installation of rpm ), it will not reload the object.
[Root @ linux: ~] Rm-f/bin/mv
3. mount the Red Hat disc. assume that the default mount point is/mnt/cdrom:
[Root @ linux: ~] Mount/mnt/cdrom
4. switch to the/mnt/cdrom/RedHat/RPMS directory and reinstall fileutils:
[Root @ linux: ~] Cd/mnt/cdrom/RedHat/RPMS
[Root @ linux:/mnt/cdrom/RedHat/RPMS] rpm-Uvh fileutils-* rpm -- force
Preparing... ######################################## ### [100%]
1: fileutils ####################################### #### [100%]