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Asked: 2013-12-04 07:18:14 +0800 CST

How to accurately check if package is installed in yum?

  • 772

I keep getting answers like:

yum list installed | grep bind

or 

rpm -qa | grep bind

But that is not accurate as I'm getting a list of few other bind packages like these:

bind-utils-9.8.2-0.17.rc1.el6_4.5.x86_64
rpcbind-0.2.0-11.el6.x86_64
bind-libs-9.8.2-0.17.rc1.el6_4.5.x86_64
samba-winbind-3.6.9-151.el6.x86_64
samba-winbind-clients-3.6.9-151.el6.x86_64
ypbind-1.20.4-30.el6.x86_64

That is not I wanted. Instead I would want to accurately check if bind core package has been installed. Eg. bind.x86_64 32:9.8.2-0.17.rc1.el6_4.6

I was hoping for something like:

yum check installed bind

But hopefully someone could shed the light.

yum

6 Answers

  1. Best Answer

    Have you tried this?

    $ yum list installed bind
    • 81

  2. There's a much easier way of issuing this query: rpm -qa | grep bind or rpm -q bind. The former is best if you're not completely sure of the package name.

    • 22

  3. Parsing the results of this command is the most complete answer. You'll need to know the exact package name. 

    yum info bind

Loaded plugins: refresh-packagekit, rhnplugin
This system is receiving updates from RHN Classic or RHN Satellite.
Installed Packages
Name        : bind
Arch        : x86_64
Epoch       : 32
Version     : 9.8.2
Release     : 0.17.rc1.el6_4.6
Size        : 7.3 M
Repo        : installed
From repo   : rhel-x86_64-workstation-6
Summary     : The Berkeley Internet Name Domain (BIND) DNS (Domain Name System) server
URL         : http://www.isc.org/products/BIND/
License     : ISC
Description : BIND (Berkeley Internet Name Domain) is an implementation of the DNS
        : (Domain Name System) protocols. BIND includes a DNS server (named),
        : which resolves host names to IP addresses; a resolver library
        : (routines for applications to use when interfacing with DNS); and
        : tools for verifying that the DNS server is operating properly.
    • 11

  4. The best one liner I've come up with to do this (which is great for using quickly in scripts) is: 

    yum info <package_name> | grep Repo | awk '{ print $3 }'

    For example: if I currently have git installed: 

    yum info git | grep Repo | awk '{ print $3 }'

    This will return installed

    If I currently don't have git installed that same previous command will return: base/7/x86_64 which is the current available installation for git

    • 2

  5. Use Python code to check if a package is installed in python using yum:

    def is_installed(package_name):
    return "not installed" in commands.getstatusoutput("rpm -q " + package_name)[1]
    • -1 
  6. yum list installed bind >/dev/null ; echo $?

    If the result is 0 (zero) the package is installed

    • -2