How to check whether a certain software is installed in Linux

Linux has many ways to install software. There are several ways to check whether a certain software is installed:

1. Software installed in rpm package

Use rpm -qa | grep "Software or package name" command to view

[root@hexuweb102 ~] rpm -qa | grep ruby

2. Software installed with deb package

Use dpkg -l | grep "Software or package name" Name" command to view

[root@hexuweb102~]dpkg-l|grepruby

3. Software installed by yum method

You can use yum list installed | grep "Software name or package name" command to view

[root@hexuweb102 ~] yum list installed | grep ruby

Recommended tutorial: linux tutorial

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