The package is nothing but a software package, a collection of executables, libraries, manuals, etc., packaged in a single file. In Fedora, CentOS 5, RHEL 5 and above, Scientific Linux, Yellow Dog Linux, and Oracle Linux packages are formatted in a .rpm file.
This post is very simple yet useful for the system admin who is very new to CentOS / RHEL / Fedora system and their software package management.
List Installed packages on CentOS / RHEL / Fedora:
You can use the rpm command with -qa option to get the list of installed packages.
rpm -qa
Output:
gnutls-3.3.24-1.el7.x86_64 filesystem-3.2-21.el7.x86_64 fxload-2002_04_11-16.el7.x86_64 virt-what-1.13-8.el7.x86_64 nss-softokn-freebl-3.16.2.3-14.4.el7.x86_64 json-c-0.11-4.el7_0.x86_64 linux-firmware-20160830-49.git7534e19.el7.noarch . . .
Another way to get a list installed packages with its detailed information.
yum list installed
Output:
Installed Packages GeoIP.x86_64 1.5.0-11.el7 @anaconda NetworkManager.x86_64 1:1.4.0-20.el7_3 @updates NetworkManager-libnm.x86_64 1:1.4.0-20.el7_3 @updates NetworkManager-team.x86_64 1:1.4.0-20.el7_3 @updates NetworkManager-tui.x86_64 1:1.4.0-20.el7_3 @updates NetworkManager-wifi.x86_64 1:1.4.0-20.el7_3 @updates acl.x86_64 2.2.51-12.el7 @anaconda acpid.x86_64 2.0.19-6.el7 @anaconda alsa-firmware.noarch 1.0.28-2.el7 @anaconda alsa-lib.x86_64 1.1.1-1.el7 @anaconda alsa-tools-firmware.x86_64 1.1.0-1.el7 @anaconda
List installed Packages with time on CentOS / RHEL / Fedora:
You can use the below command get the list of packages with its time of installation.
rpm -qa --last
Output:
net-tools-2.0-0.17.20131004git.el7.x86_64 Tue 25 Jul 2017 01:10:39 PM UTC yum-cron-3.4.3-150.el7.centos.noarch Wed 19 Jul 2017 10:16:08 PM UTC xfsprogs-4.5.0-10.el7_3.x86_64 Wed 19 Jul 2017 10:15:48 PM UTC nss-tools-3.28.4-1.2.el7_3.x86_64 Wed 19 Jul 2017 10:15:48 PM UTC libpciaccess-0.13.4-3.el7_3.x86_64 Wed 19 Jul 2017 10:15:48 PM UTC libnetfilter_conntrack-1.0.6-1.el7_3.x86_64 Wed 19 Jul 2017 10:15:48 PM UTC epel-release-7-10.noarch Wed 19 Jul 2017 10:15:48 PM UTC dmidecode-3.0-2.1.el7_3.x86_64 Wed 19 Jul 2017 10:15:48 PM UTC libnl3-cli-3.2.28-3.el7_3.x86_64 Wed 19 Jul 2017 10:15:47 PM UTC chrony-2.1.1-4.el7.centos.x86_64 Wed 19 Jul 2017 10:15:47 PM UTC
Search for installed packages on CentOS / RHEL / Fedora:
Use the below command to see whether the particular package is installed on your system or not.
rpm -qa | grep -i wget
Output:
wget-1.14-13.el7.x86_64
Alternate way,
yum list installed wget
Output:
Installed Packages wget.x86_64 1.14-13.el7 @base
Get details of Installed Package on CentOS / RHEL / Fedora:
Use the below command to get detailed information about a particular package.
rpm -qi wget
Output:
Name : wget Version : 1.14 Release : 13.el7 Architecture: x86_64 Install Date: Wed 09 Aug 2017 04:23:51 PM UTC Group : Applications/Internet Size : 2055469 License : GPLv3+ Signature : RSA/SHA256, Sun 20 Nov 2016 08:59:56 PM UTC, Key ID 24c6a8a7f4a80eb5 Source RPM : wget-1.14-13.el7.src.rpm Build Date : Sat 05 Nov 2016 07:19:44 PM UTC Build Host : worker1.bsys.centos.org Relocations : (not relocatable) Packager : CentOS BuildSystem <http://bugs.centos.org> Vendor : CentOS URL : http://www.gnu.org/software/wget/ Summary : A utility for retrieving files using the HTTP or FTP protocols Description : GNU Wget is a file retrieval utility which can use either the HTTP or FTP protocols. Wget features include the ability to work in the background while you are logged out, recursive retrieval of directories, file name wildcard matching, remote file timestamp storage and comparison, use of Rest with FTP servers and Range with HTTP servers to retrieve files over slow or unstable connections, support for Proxy servers, and configurability.
OR
yum info wget
Output:
Installed Packages
Name : wget
Arch : x86_64
Version : 1.14
Release : 13.el7
Size : 2.0 M
Repo : installed
From repo : base
Summary : A utility for retrieving files using the HTTP or FTP protocols
URL : http://www.gnu.org/software/wget/
License : GPLv3+
Description : GNU Wget is a file retrieval utility which can use either the HTTP or
: FTP protocols. Wget features include the ability to work in the
: background while you are logged out, recursive retrieval of
: directories, file name wildcard matching, remote file timestamp
: storage and comparison, use of Rest with FTP servers and Range with
: HTTP servers to retrieve files over slow or unstable connections,
: support for Proxy servers, and configurability.
Get a list of created files from the package on CentOS / RHEL / Fedora:
Sometimes, you need to know what are the files created at the time of package installation.
rpm -ql wget
Output:
/etc/wgetrc /usr/bin/wget /usr/share/doc/wget-1.14 /usr/share/doc/wget-1.14/AUTHORS /usr/share/doc/wget-1.14/COPYING /usr/share/doc/wget-1.14/MAILING-LIST /usr/share/doc/wget-1.14/NEWS /usr/share/doc/wget-1.14/README /usr/share/doc/wget-1.14/sample.wgetrc /usr/share/info/wget.info.gz /usr/share/locale/be/LC_MESSAGES/wget.mo /usr/share/locale/bg/LC_MESSAGES/wget.mo /usr/share/locale/ca/LC_MESSAGES/wget.mo /usr/share/locale/cs/LC_MESSAGES/wget.mo /usr/share/locale/da/LC_MESSAGES/wget.mo /usr/share/locale/de/LC_MESSAGES/wget.mo /usr/share/locale/el/LC_MESSAGES/wget.mo /usr/share/locale/en_GB/LC_MESSAGES/wget.mo /usr/share/locale/eo/LC_MESSAGES/wget.mo /usr/share/locale/es/LC_MESSAGES/wget.mo /usr/share/locale/et/LC_MESSAGES/wget.mo . . .
Export Installed Packages list on CentOS / RHEL / Fedora:
Exporting packages could be useful when you want a similar set of packages to be installed on another machine.
rpm -qa > mypackagelist.txt cat mypackagelist.txt
OR
yum list installed | awk 'FNR > 2{print $1}' > mypackagelist.txt
cat mypackagelist.txt
Restore installed packages on CentOS / RHEL / Fedora:
If you have a backup of the list of installed packages then simply use the following command on another machine to make it identical.
yum install $(cat mypackagelist.txt)
That’s All.
