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This article focuses on "how to use yum commands to upgrade plug-ins in the CentOS system". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to use yum commands to upgrade plug-ins in CentOS systems.

The security upgrade of the server is necessary, so here is a yum plug-in: yum-plugin-security for security upgrade.

1. Yum-plugin-security is installed by default on the general system. If not, enter the command to install yum-plugin-security:

$sudo yum install yum-security

two。 If it is red hat 6, a updateinfo command has been added. This command is used to view a list of software that can be safely updated (view only, not update). Enter the following command:

The code is as follows:

$sudo yum updateinfo list security

Output:

The code is as follows:

Loaded plugins: security, versionlock

CVE-2013-1619 security gnutls-2.8.5-10.el6_4.1.x86_64

CVE-2013-1493 security java-1.6.0-openjdk-1:1.6.0.0-1.57.1.11.9.el6_4.x86_64

CVE-2013-0809 security java-1.6.0-openjdk-1:1.6.0.0-1.57.1.11.9.el6_4.x86_64

CVE-2013-0268 security kernel-uek-2.6.39-400.17.2.el6uek.x86_64

CVE-2013-0268 security kernel-uek-firmware-2.6.39-400.17.2.el6uek.noarch

CVE-2012-4929 security openssl-1.0.0-27.el6_4.2.x86_64

CVE-2013-0166 security openssl-1.0.0-27.el6_4.2.x86_64

CVE-2013-0169 security openssl-1.0.0-27.el6_4.2.x86_64

Updateinfo list done

For red hat or centos version 5.x, use the following command to view a list of software that can be safely updated:

The code is as follows:

$sudo yum list updates-security

To upgrade packages that require security updates, enter the command:

The code is as follows:

$sudo yum update-security

The output is as follows:

The code is as follows:

Loaded plugins: security, versionlock

Setting up Update Process

Resolving Dependencies

Limiting packages to security relevant ones

5 package (s) needed (+ 0 related) for security, out of 17 available

-> Running transaction check

-> Package gnutls.x86_64 0RU 2.8.5-10.el6 will be updated

-> Package gnutls.x86_64 0RU 2.8.5-10.el6_4.1 will be an update

-> Package java-1.6.0-openjdk.x86_64 1purl 1.6.0.0-1.56.1.11.8.el6_3 will be updated

-> Package java-1.6.0-openjdk.x86_64 1purl 1.6.0.0-1.57.1.11.9.el6_4 will be an update

-> Package kernel-uek.x86_64 0RU 2.6.39-400.17.2.el6uek will be installed

-> Package kernel-uek-firmware.noarch 0RU 2.6.39-400.17.2.el6uek will be installed

-> Package openssl.x86_64 0vl 1.0.0-27.el6 will be updated

-> Package openssl.x86_64 0vl 1.0.0-27.el6_4.2 will be an update

-> Finished Dependency Resolution

-> Running transaction check

-> Package kernel-uek.x86_64 0RU 2.6.39-300.17.3.el6uek will be erased

-> Package kernel-uek-firmware.noarch 0RU 2.6.39-300.17.3.el6uek will be erased

-> Finished Dependency Resolution

Dependencies Resolved

=

Package Arch Version Repository Size

=

Installing:

Kernel-uek x8631 64 2.6.39-400.17.2.el6uek ol6_UEK_latest 27m

Kernel-uek-firmware noarch 2.6.39-400.17.2.el6uek ol6_UEK_latest 3.5m

Updating:

Gnutls x8634 2.8.5-10.el6_4.1 ol6_latest 345k

Java-1.6.0-openjdk x86 "64 1purl 1.6.0.0-1.57.1.11.9.el6_4 ol6_latest 25m

Openssl x8634 1.0.0-27.el6_4.2 ol6_latest 1.4m

Removing:

Kernel-uek x8631 64 2.6.39-300.17.3.el6uek @ ol6_UEK_latest 99 M

Kernel-uek-firmware noarch 2.6.39-300.17.3.el6uek @ ol6_UEK_latest 5.0m

Transaction Summary

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Install 2 Package (s)

Upgrade 3 Package (s)

Remove 2 Package (s)

Total download size: 57 M

If you enter y for Is this ok [y]: / /, you will confirm the upgrade.

End!

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