Can centos be upgraded?

centos can be upgraded. The upgrade methods are: 1. Check the system version; 2. Back up important data; 3. Run the yum command to upgrade; 4. Restart the system.

The operating environment of this article: CentOS 7 system, DELL G3 computer

Can centos be upgraded?

able!

Upgrade centos to the latest version:

The "update" command in centos can update all software to the latest version at one time.

Note: It is not recommended to use the y option of update. The -y option will allow you to confirm before installing each update (Translator's Note: This will be very time-consuming and the update progress is busy);

For centos 5.X and 6.X systems, we need to reinstall the application to restore data after updating. Fortunately, centos7 does not need to be so troublesome and can be upgraded directly. For safety reasons, if you have important data, it is recommended to make a backup before upgrading the system.

The following are the steps for centos 7.X upgrade

1. Check the system version

$ cat /etc/redhat-release
CentOS Linux release 7.1.1503 (Core)

2. Back up important data (such as /etc, / var,/opt). If centos is installed on a virtual machine, you can use snapshots for backup. For example, VMware virtual machines can be backed up by snapshots. Of course, the more luxurious thing is to back up the entire virtual machine. It can also back up important program data, such as MySQL, Appache, Nginx, DNS, etc.

3. Run the yum command to upgrade

$ sudo yum clean all
$ sudo yum update

4. Restart the system

$ sudo reboot

5. Check the current system version

$ cat /etc/redhat-release
CentOS Linux release 7.3.1611 (Core)

Hope this article can help you upgrade smoothly centos 7 to the latest version.

Note: Before upgrading, remember to check that the system is running normally and that system services have been installed.

Recommended: "centos usage tutorial"

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