11. Update System using
Yum
To keep your system up-to-date
with all security and binary package updates, run the following command. It
will install all latest patches and security updates to your system.
12. List all available Group Packages
In Linux, number of packages
are bundled to particular group. Instead of installing individual packages with
yum, you can install particular group that will install all the related
packages that belongs to the group. For example to list all the available groups,
just issue following command.
Installed Groups:
Administration Tools
DNS Name Server
Dialup Networking Support
Editors
Engineering and Scientific
FTP Server
Graphics
Java Development
Legacy Network Server
Available Groups:
Authoring and Publishing
Base
Beagle
Cluster Storage
Clustering
Development Libraries
Development Tools
Eclipse
Educational Software
KDE (K Desktop Environment)
KDE Software Development
13. Install a Group Packages
To
install a particular package group, we use option as groupinstall. Fore example, to install “MySQL Database“, just execute the below
command.
Dependencies Resolved
=================================================================================================
Package Arch Version Repository Size
=================================================================================================
Updating:
unixODBC i386 2.2.11-10.el5 base 290 k
Installing for dependencies:
unixODBC-libs i386 2.2.11-10.el5 base 551 k
Transaction Summary
=================================================================================================
Install 1 Package(s)
Upgrade 1 Package(s)
Total size: 841 k
Is this ok [y/N]: y
Downloading Packages:
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Installing : unixODBC-libs 1/3
Updating : unixODBC 2/3
Cleanup : unixODBC 3/3
Dependency Installed:
unixODBC-libs.i386 0:2.2.11-10.el5
Updated:
unixODBC.i386 0:2.2.11-10.el5
Complete!
14. Update a Group Packages
To update any existing
installed group packages, just run the following command as shown below.
Dependencies Resolved
================================================================================================================
Package Arch Version Repository Size
================================================================================================================
Updating:
bind i386 30:9.3.6-20.P1.el5_8.2 updates 981 k
bind-chroot i386 30:9.3.6-20.P1.el5_8.2 updates 47 k
Updating for dependencies:
bind-libs i386 30:9.3.6-20.P1.el5_8.2 updates 864 k
bind-utils i386 30:9.3.6-20.P1.el5_8.2 updates 174 k
Transaction Summary
================================================================================================================
Install 0 Package(s)
Upgrade 4 Package(s)
Total size: 2.0 M
Is this ok [y/N]: y
Downloading Packages:
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Updating : bind-libs 1/8
Updating : bind 2/8
Updating : bind-chroot 3/8
Updating : bind-utils 4/8
Cleanup : bind 5/8
Cleanup : bind-chroot 6/8
Cleanup : bind-utils 7/8
Cleanup : bind-libs 8/8
Updated:
bind.i386 30:9.3.6-20.P1.el5_8.2 bind-chroot.i386 30:9.3.6-20.P1.el5_8.2
Dependency Updated:
bind-libs.i386 30:9.3.6-20.P1.el5_8.2 bind-utils.i386 30:9.3.6-20.P1.el5_8.2
Complete!
15. Remove a Group Packages
To delete or remove any
existing installed group from the system, just use below command.
Dependencies Resolved
===========================================================================================================
Package Arch Version Repository Size
===========================================================================================================
Removing:
bind i386 30:9.3.6-20.P1.el5_8.2 installed 2.1 M
bind-chroot i386 30:9.3.6-20.P1.el5_8.2 installed 0.0
Transaction Summary
===========================================================================================================
Remove 2 Package(s)
Reinstall 0 Package(s)
Downgrade 0 Package(s)
Is this ok [y/N]: y
Downloading Packages:
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Erasing : bind 1/2
warning: /etc/sysconfig/named saved as /etc/sysconfig/named.rpmsave
Erasing : bind-chroot 2/2
Removed:
bind.i386 30:9.3.6-20.P1.el5_8.2 bind-chroot.i386 30:9.3.6-20.P1.el5_8.2
Complete!
16. List Enabled Yum Repositories
To list all enabled Yum
repositories in your system, use following option.
repo id repo name status
base CentOS-5 - Base enabled: 2,725
epel Extra Packages for Enterprise Linux 5 - i386 enabled: 5,783
extras CentOS-5 - Extras enabled: 282
mod-pagespeed mod-pagespeed enabled: 1
rpmforge RHEL 5 - RPMforge.net - dag enabled: 11,290
updates CentOS-5 - Updates enabled: 743
repolist: 20,824
16. List all Enabled and Disabled Yum
Repositories
The following command will
display all enabled and disabled yum repositories on the system.
repo id repo name status
C5.0-base CentOS-5.0 - Base disabled
C5.0-centosplus CentOS-5.0 - Plus disabled
C5.0-extras CentOS-5.0 - Extras disabled
base CentOS-5 - Base enabled: 2,725
epel Extra Packages for Enterprise Linux 5 - i386 enabled: 5,783
extras CentOS-5 - Extras enabled: 282
repolist: 20,824
17. Install a Package from Specific
Repository
To
install a particular package from a specific enabled or disabled repository,
you must use –enablerepo option
in your yum command. For example to Install PhpMyAdmin 3.5.2 package, just execute the
command.
Dependencies Resolved
=============================================================================================
Package Arch Version Repository Size
=============================================================================================
Installing:
phpMyAdmin noarch 3.5.1-1.el6 epel 4.2 M
Transaction Summary
=============================================================================================
Install 1 Package(s)
Total download size: 4.2 M
Installed size: 17 M
Is this ok [y/N]: y
Downloading Packages:
phpMyAdmin-3.5.1-1.el6.noarch.rpm | 4.2 MB 00:25
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Installing : phpMyAdmin-3.5.1-1.el6.noarch 1/1
Verifying : phpMyAdmin-3.5.1-1.el6.noarch 1/1
Installed:
phpMyAdmin.noarch 0:3.5.1-1.el6
Complete!
18. Interactive Yum Shell
Yum utility provides a custom
shell where you can execute multiple commands.
Loaded plugins: fastestmirror
Setting up Yum Shell
> update httpd
Loading mirror speeds from cached hostfile
* base: mirrors.sin3.sg.voxel.net
* epel: ftp.riken.jp
* extras: mirrors.sin3.sg.voxel.net
* updates: mirrors.sin3.sg.voxel.net
Setting up Update Process
>
19. Clean Yum Cache
By
default yum keeps all the repository enabled package data in /var/cache/yum/ with each sub-directory,
to clean all cached files from enabled repository, you need to run the
following command regularly to clean up all the cache and make sure that there
is nothing unnecessary space is using. We don’t want to give the output of the
below command, because we like to keep cached data as it is.
20. View History of Yum
To view all the past
transactions of yum command, just use the following command.
Loaded plugins: fastestmirror
ID | Login user | Date and time | Action(s) | Altered
-------------------------------------------------------------------------------
10 | root | 2012-08-11 15:19 | Install | 3
9 | root | 2012-08-11 15:11 | Install | 1
8 | root | 2012-08-11 15:10 | Erase | 1 EE
7 | root | 2012-08-10 17:44 | Install | 1
6 | root | 2012-08-10 12:19 | Install | 2
5 | root | 2012-08-10 12:14 | Install | 3
4 | root | 2012-08-10 12:12 | I, U | 13 E<
3 | root | 2012-08-09 13:01 | Install | 1 >
2 | root | 2012-08-08 20:13 | I, U | 292 EE
1 | System | 2012-08-08 17:15 | Install | 560
history list
I have tried to cover all the
basic to advance yum commands with their examples.
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