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centos how to check for dependency and uninstall package

I am running centos 5.

1) How do I use rpm command to list the package installed and its dependency.

2) How do I use rpm command to uninstall package and its dependency?

thnx.

This command will list any package that has "fox" in it's name...

Code:

rpm -qa | grep fox

This command will list what is required by the firefox package...

Code:

rpm -q -R firefox

This command will erase the firefox package...

Code:

rpm -e firefox

If something depends on a package you are erasing, it will error and tell you what it is. You can then add it to the erase command if you want, or not do anything. (Thunderbird doesn't depend on firefox, that's just an example of erasing two packages at once.)

Code:

rpm -e firefox thunderbird

It's prob'ly not a good idea to run a command that tries to delete all dependencies for a package... In the example above, it lists about 100 dependencies for firefox.

Now, having answered the questions, is there a reason you need / want to use rpm rather than yum? yum is a package manager that uses rpm. yum is also better at handling dependencies than rpm. The commands above would be similar in yum...

Code:

yum list | grep fox

Code:

yum deplist firefox

Code:

yum remove firefox

This command will install GIMP. It will check if there are any dependencies that need to be downloaded and installed, and do so. rpm won't retrieve dependencies, just error when you don't have them.

Code:

yum install gimp

I have package A, B and C. Package A needs B and B needs C.
I want to uninstall package A. If do:

Code:

rpm -e packA

I will complain about packB.

Code:

rpm -e packA, packB

then it will complain about packC. Do I have to keep doing this until I get to the bottom of the dependency and add the package to the command

Code:

rpm -e packA,..,packZ

?

Or any simpler way to remove or at least list this type of package dependency?

Have you tried yum remove? It should be able to do this for you

Quote:

Originally Posted by jCash (Post 2966875)

I have package A, B and C. Package A needs B and B needs C.
I want to uninstall package A.

If you remove A, it should go without a problem... In your example, nothing depends on A.

Unfortunately, you'll have to track down and remove any packages A depends on.

You can use YUM for install and uninstall packages

Task: Display list of updated software (security fix)

Quote:

Type the following command at shell prompt:
# yum list updates

Task: List all installed packages

List all installed packages, enter:
# rpm -qa
# yum list installed

Task: Check for and update specified packages

# yum update {package-name-1}

Task: Search for packages by name

Search httpd and all matching perl packages, enter:
# yum list {package-name}
# yum list {regex}
# yum list httpd
# yum list perl*

Task: Install the specified packages [ RPM(s) ]

Install package called httpd:
# yum install {package-name-1} {package-name-2}
# yum install httpd

Task: Remove / Uninstall the specified packages [ RPM(s) ]

Remove package called httpd, enter:
# yum remove {package-name-1} {package-name-2}
# yum remove httpd

Task: Update all the default packages by group

Update all 'Development Tools' group packages, enter:
# yum groupupdate "Development Tools"

Code:

http://www.cyberciti.biz/faq/rhel-centos-fedora-linux-yum-command-howto/

Best regards

Please don't bring up old posts (3 yrs old).