As a web hosting server admin, you want to keep your machine up-to-date. In RedHat/CentOS, you will use the yum tool to keep your packages updated.
What is yum?
https://access.redhat.com/solutions/9934
yum is the primary tool for getting, installing, deleting, querying, and managing Red Hat Enterprise Linux RPM software packages from official Red Hat software repositories, as well as other third-party repositories. yum is used in Red Hat Enterprise Linux versions 5 and later. Versions of Red Hat Enterprise Linux 4 and earlier used up2date.
To update your operating system packages:
1. Log in to SSH and switch to the root user
2. Clear the cached packages
# yum clean allOn a cPanel server, the output will look like:
root@web [~]# yum clean all
Loaded plugins: fastestmirror, tsflags, universal-hooks
Cleaning repos: EA4 cpanel-addons-production-feed cpanel-plugins MariaDB103 base epel extras psrepo updates
Cleaning up list of fastest mirrors
Other repos take up 6.5 M of disk space (use --verbose for details)
root@web [~]#3. Run the yum update command to update the packages
On one of our web hosting servers, the output is:
root@web [~]# yum update
Loaded plugins: fastestmirror, tsflags, universal-hooks
Determining fastest mirrors
epel/x86_64/metalink | 17 kB 00:00:00
* EA4: 208.74.123.61
* cpanel-addons-production-feed: 208.74.123.61
* cpanel-plugins: 208.74.123.61
* base: mirrors.unifiedlayer.com
* epel: fedora-epel.mirror.lstn.net
* extras: mirror.dc2.hackingand.coffee
* updates: mirror.netdepot.com
EA4 | 2.9 kB 00:00:00
cpanel-addons-production-feed | 2.9 kB 00:00:00
cpanel-plugins | 2.9 kB 00:00:00
MariaDB103 | 2.9 kB 00:00:00
base | 3.6 kB 00:00:00
epel | 5.3 kB 00:00:00
extras | 2.9 kB 00:00:00
psrepo | 2.9 kB 00:00:00
updates | 2.9 kB 00:00:00
vz-base | 951 B 00:00:00
vz-updates | 951 B 00:00:00
(1/12): cpanel-addons-production-feed/x86_64/primary_db | 18 kB 00:00:00
(2/12): cpanel-plugins/x86_64/primary_db | 30 kB 00:00:00
(3/12): MariaDB103/primary_db | 53 kB 00:00:00
(4/12): epel/x86_64/group_gz | 90 kB 00:00:00
(5/12): base/7/x86_64/group_gz | 165 kB 00:00:00
(6/12): EA4/7/x86_64/primary_db | 1.0 MB 00:00:00
(7/12): extras/7/x86_64/primary_db | 153 kB 00:00:00
(8/12): psrepo/7/primary_db | 74 kB 00:00:00
(9/12): epel/x86_64/updateinfo | 1.0 MB 00:00:00
(10/12): base/7/x86_64/primary_db | 6.0 MB 00:00:01
(11/12): updates/7/x86_64/primary_db | 5.9 MB 00:00:01
(12/12): epel/x86_64/primary_db | 6.9 MB 00:00:01
(1/2): vz-base/primary | 723 B 00:00:00
(2/2): vz-updates/primary | 1.0 kB 00:00:00
vz-base 1/1
vz-updates 4/4
Resolving Dependencies
--> Running transaction check
---> Package epel-release.noarch 0:7-11 will be updated
---> Package epel-release.noarch 0:7-12 will be an update
---> Package kmod-libs.x86_64 0:20-23.el7 will be updated
---> Package kmod-libs.x86_64 0:20-25.el7 will be an update
---> Package yara.x86_64 0:3.8.1-1.el7 will be updated
---> Package yara.x86_64 0:3.11.0-1.el7 will be an update
--> Finished Dependency Resolution
Dependencies Resolved
========================================================================================================================================================================
Package Arch Version Repository Size
========================================================================================================================================================================
Updating:
epel-release noarch 7-12 epel 15 k
kmod-libs x86_64 20-25.el7 base 51 k
yara x86_64 3.11.0-1.el7 epel 213 k
Transaction Summary
========================================================================================================================================================================
Upgrade 3 Packages
Total download size: 278 k
Is this ok [y/d/N]: y
Downloading packages:
Delta RPMs disabled because /usr/bin/applydeltarpm not installed.
(1/3): epel-release-7-12.noarch.rpm | 15 kB 00:00:00
(2/3): kmod-libs-20-25.el7.x86_64.rpm | 51 kB 00:00:00
(3/3): yara-3.11.0-1.el7.x86_64.rpm | 213 kB 00:00:00
------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total 656 kB/s | 278 kB 00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Updating : epel-release-7-12.noarch 1/6
Updating : kmod-libs-20-25.el7.x86_64 2/6
Updating : yara-3.11.0-1.el7.x86_64 3/6
Cleanup : epel-release-7-11.noarch 4/6
Cleanup : kmod-libs-20-23.el7.x86_64 5/6
Cleanup : yara-3.8.1-1.el7.x86_64 6/6
Verifying : yara-3.11.0-1.el7.x86_64 1/6
Verifying : kmod-libs-20-25.el7.x86_64 2/6
Verifying : epel-release-7-12.noarch 3/6
Verifying : kmod-libs-20-23.el7.x86_64 4/6
Verifying : yara-3.8.1-1.el7.x86_64 5/6
Verifying : epel-release-7-11.noarch 6/6
Updated:
epel-release.noarch 0:7-12 kmod-libs.x86_64 0:20-25.el7 yara.x86_64 0:3.11.0-1.el7
Complete!
root@web [~]#