How to use the rpm command
This article mainly shows you "how to use rpm command", the content is simple and easy to understand, clear organization, I hope to help you solve doubts, let Xiaobian lead you to study and learn "how to use rpm command" this article bar.
rpm (Red Hat Package Manger) refers to packaging and installation tools
rpm -a
rpm -q
< rpm package name>Interpretation: Query whether a package is installed
rpm -qa
rpm -qa -q Query all packages (all) using query mode (query)-a
List all installed rpm packages
The difference from rpm -a is already, for example:
rpm -qa | grep
rpm -qa | grep xxx |pipeline technology, delete grep lookup---a text search tool
Interpretation: Find xxx in the information returned by-qa and return the final result.
rpm -qa |grep -i xxx-i case insensitive xxx
Of course, grep can also be combined with other commands as a search tool
rpm -e --"unloading" requiring caution
Normally, we'd use
rpm -e xxx
But if software yyy is "dependent" on xxx--that is, yyy must have xxx to run
is returned
error: xxx is needed by yyy
At this time, you can force deletion without checking dependencies (careful operation)
rpm -e --nodeps
Alternatively, if several packages have the same name, ignore dependencies and delete all packages with the same name using the following command
rpm -e --allmatches --nodeps
Of course, delete and query can be combined, for example
rpm -e --nodeps 'rpm -qa | grep mysql'
the problems that may be encountered
warning: /etc/yum.repos.d/mysql-community.repo saved as /etc/yum.repos.d/mysql-community.repo.rpmsave
The cause of the problem is unknown. I don't know why it is automatically saved as.repo.rpmsave. The solution is to change it to the original.repo format by mv command.
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