Yum is a high level package managers like apt-get and smart. you can use YUM to install new packages, remove old packages or check if packages has any updates in your system.
In this post, I will show you how to:
#1 YUM checking which installed Packages have any updates on your system
#2 YUM updating package for a single package
#3 YUM updating Packages for multiple packages
#4 YUM updating Packages for all packages
From manual page of “yum”:
yum is an interactive, rpm based, package manager. It can automatically perform system updates, including dependency analysis and obsolete processing based on “repository” metadata. It can also perform installation of new packages, removal of old packages and perform queries on the installed and/or available packages among many other commands/services (see below). yum is similar to other high level package managers like apt-get and smart.
CentOS 7 YUM Checking Updates
If you want to see if there are packages available for an update on centos 7 system, issue the following “yum” command with “check-update” option.
yum check-update
Outputs:
[root@devops Desktop]# yum check-update Loaded plugins: fastestmirror, langpacks base | 3.6 kB 00:00:00 extras | 3.4 kB 00:00:00 updates | 3.4 kB 00:00:00 updates/7/x86_64/primary_db | 4.8 MB 00:00:22 Loading mirror speeds from cached hostfile * base: mirrors.nwsuaf.edu.cn * extras: mirrors.nwsuaf.edu.cn * updates: mirrors.nwsuaf.edu.cn NetworkManager.x86_64 1:0.9.9.1-29.git20140326.4dba720.el7_0 updates NetworkManager-glib.x86_64 1:0.9.9.1-29.git20140326.4dba720.el7_0 updates NetworkManager-tui.x86_64 1:0.9.9.1-29.git20140326.4dba720.el7_0 updates abrt.x86_64 2.1.11-12.el7.centos.0.1 updates abrt-addon-ccpp.x86_64 2.1.11-12.el7.centos.0.1 updates abrt-addon-kerneloops.x86_64 2.1.11-12.el7.centos.0.1 updates abrt-addon-pstoreoops.x86_64 2.1.11-12.el7.centos.0.1 updates abrt-addon-python.x86_64 2.1.11-12.el7.centos.0.1 updates abrt-addon-vmcore.x86_64 2.1.11-12.el7.centos.0.1 updates abrt-addon-xorg.x86_64 2.1.11-12.el7.centos.0.1 updates abrt-cli.x86_64 2.1.11-12.el7.centos.0.1 updates abrt-console-notification.x86_64 2.1.11-12.el7.centos.0.1 updates abrt-dbus.x86_64 2.1.11-12.el7.centos.0.1 updates abrt-desktop.x86_64 2.1.11-12.el7.centos.0.1 updates abrt-gui.x86_64 2.1.11-12.el7.centos.0.1 updates abrt-gui-libs.x86_64 2.1.11-12.el7.centos.0.1 updates abrt-libs.x86_64 2.1.11-12.el7.centos.0.1 updates abrt-python.x86_64 2.1.11-12.el7.centos.0.1 updates abrt-tui.x86_64 2.1.11-12.el7.centos.0.1 updates at.x86_64 3.1.13-17.el7_0.1 updates ...
It will print all packages that have an update available. and the output will also show you the name of package have updates available, the version of installed package.
If you just want to see one particular package if there is a update, just appending the package name to “yum check-update” command. such as, Yum checking wget package update:
root@devops Desktop]# yum check-update wget Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile * base: mirrors.nwsuaf.edu.cn * extras: mirrors.nwsuaf.edu.cn * updates: mirrors.nwsuaf.edu.cn wget.x86_64 1.14-10.el7_0.1 updates [root@devops Desktop]#
If you can see “updates” string, it indicated that this package have a update.
CentOS 7 YUM Updating A Single Package
After checking the update for installed package on your system, you should be want to update it to the latest version. to update a single package, issue the following command:
yum update <package name>
Example: yum updating wget package
Firstly, checking the current version of wget package
[root@devops Desktop]# rpm -qa | grep wget wget-1.14-10.el7.x86_64
Then, updating wget package using “yum update wget” command
[root@devops Desktop]# yum update wget Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile * base: mirrors.nwsuaf.edu.cn * extras: mirrors.nwsuaf.edu.cn * updates: mirrors.nwsuaf.edu.cn Resolving Dependencies --> Running transaction check ---> Package wget.x86_64 0:1.14-10.el7 will be updated ---> Package wget.x86_64 0:1.14-10.el7_0.1 will be an update --> Finished Dependency Resolution Dependencies Resolved ====================================================================================================== Package Arch Version Repository Size ====================================================================================================== Updating: wget x86_64 1.14-10.el7_0.1 updates 545 k Transaction Summary ====================================================================================================== Upgrade 1 Package Total download size: 545 k Is this ok [y/d/N]: y Downloading packages: updates/7/x86_64/prestodelta | 218 kB 00:00:03 Delta RPMs reduced 545 k of updates to 253 k (53% saved) wget-1.14-10.el7_1.14-10.el7_0.1.x86_64.drpm | 253 kB 00:00:01 Finishing delta rebuilds of 1 package(s) (545 k) warning: /var/cache/yum/x86_64/7/updates/packages/wget-1.14-10.el7_0.1.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7 Importing GPG key 0xF4A80EB5: Userid : "CentOS-7 Key (CentOS 7 Official Signing Key) <security@centos.org>" Fingerprint: 6341 ab27 53d7 8a78 a7c2 7bb1 24c6 a8a7 f4a8 0eb5 Package : centos-release-7-0.1406.el7.centos.2.3.x86_64 (@anaconda) From : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7 Is this ok [y/N]: y Running transaction check Running transaction test Transaction test succeeded Running transaction Updating : wget-1.14-10.el7_0.1.x86_64 1/2 Cleanup : wget-1.14-10.el7.x86_64 2/2 Verifying : wget-1.14-10.el7_0.1.x86_64 1/2 Verifying : wget-1.14-10.el7.x86_64 2/2 Updated: wget.x86_64 0:1.14-10.el7_0.1 Complete!
CentOS 7 YUM updating Packages for multiple packages
If you want to update multiple packages at the same time, just appending packages names to “yum update” comand, just like the following format:
yum update <package name1> <package name2>
Example, yum updating wget and samba-client, issue the following command:
yum update wget samba-client
CentOS 7 YUM updating Packages For All Packages
If there are lots of packages that have update available, you must be want know if there is a way to update it at once . Of course, the answer is yes. just simply issue “yum update” command without any options.
yum update
Outputs:
[root@devops Desktop]# yum update Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile * base: mirrors.nwsuaf.edu.cn * extras: mirrors.nwsuaf.edu.cn * updates: mirrors.nwsuaf.edu.cn Resolving Dependencies --> Running transaction check ---> Package NetworkManager.x86_64 1:0.9.9.1-13.git20140326.4dba720.el7 will be updated ---> Package NetworkManager.x86_64 1:0.9.9.1-29.git20140326.4dba720.el7_0 will be an update ---> Package NetworkManager-glib.x86_64 1:0.9.9.1-13.git20140326.4dba720.el7 will be updated ---> Package NetworkManager-glib.x86_64 1:0.9.9.1-29.git20140326.4dba720.el7_0 will be an update ---> Package NetworkManager-tui.x86_64 1:0.9.9.1-13.git20140326.4dba720.el7 will be updated ---> Package NetworkManager-tui.x86_64 1:0.9.9.1-29.git20140326.4dba720.el7_0 will be an update ---> Package abrt.x86_64 0:2.1.11-12.el7.centos will be updated ---> Package abrt.x86_64 0:2.1.11-12.el7.centos.0.1 will be an update ---> Package abrt-addon-ccpp.x86_64 0:2.1.11-12.el7.centos will be updated ... --> Finished Dependency Resolution Dependencies Resolved ====================================================================================================== Package Arch Version Repository Size ====================================================================================================== Installing: kernel x86_64 3.10.0-123.9.3.el7 updates 29 M kernel-devel x86_64 3.10.0-123.9.3.el7 updates 8.9 M Updating: NetworkManager x86_64 1:0.9.9.1-29.git20140326.4dba720.el7_0 updates 1.4 M NetworkManager-glib x86_64 1:0.9.9.1-29.git20140326.4dba720.el7_0 updates 370 k NetworkManager-tui x86_64 1:0.9.9.1-29.git20140326.4dba720.el7_0 updates 191 k ... Transaction Summary ====================================================================================================== Install 2 Packages (+1 Dependent package) Upgrade 213 Packages Total download size: 333 M Is this ok [y/d/N]:
It may be take a while to updating all package …..
done…