How to check which software has been downloaded and installed in centos

In centos, you can use rpm to check which software has been downloaded and installed. rpm is a database recording method. It is a set of management programs that install the required packages to the system host. The parameter "-a " means querying all installed software packages. The parameter "-q" means querying whether a package is installed. The syntax is "rpm -qa".

The operating environment of this article: centos 7 system, Dell G3 computer.

How to check which software has been downloaded and installed in centos

Query the installed software in the system

rpm -qa

The

–a option is to query all installed software software package.

-q is to query whether a package is installed

(display difference: installed rpm packages will not display the suffix .rpm, while uninstalled packages will display the suffix .rpm)

Query which software package an installed file belongs to;

rpm -qf 文件名的绝对路径

RPM is the abbreviation of "Redhat Package

Manager". You can also guess from the name that this was developed by Redhat. . RPM is a set of management programs that install the packages you need to your Linux host in a database record manner. In other words, there is a database about RPM in your Linux system, which records the installed packages and the dependencies between packages.

The example is as follows:

Use rpm to query all software packages that centos has installed

Recommended tutorial: " centos tutorial》

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