Linux learning to see if the software is installed

1, RPM package installed, you can see with RPM-QA, if you want to find a package is installed, with Rpm-qa | grep "Software or the name of the package"

2, with the Deb package installed, can be seen with dpkg-l. If you are looking for a specified package, use dpkg-l | grep "Software or package name"

3, Yum method installed, can be found with Yum list installed, if it is to find the specified package, with Yum list installed | grep "software name or package name"

Linux learning to see if the software is installed