E: Unable to locate package yum

The "yum" package manager is specific to the RPM-based Linux distributions such as CentOS, Fedora, and Red Hat Enterprise Linux. If you are using a different Linux distribution, then it won't have the "yum" package manager installed by default.

For Debian and Ubuntu-based Linux distributions, the package manager is "apt" (Advanced Package Tool). You can use the following command to install packages using "apt":

sudo apt-get install <package-name>

If you are still having trouble locating a specific package, try updating your package list using the following command:

sudo apt-get update

Then try installing the package again using the "apt-get install" command.