YUM Commands: Checking for Available Updates

Which YUM command is used to check for available updates?

a. yum update
b. yum update all
c. yum update system
d. yum check-update

Answer: The command 'yum check-update' is used to check for available updates in the YUM package manager.

When it comes to managing software packages in Linux, YUM (Yellowdog Updater Modified) is a widely used package management utility.

The YUM command that is specifically used to check for available updates is 'yum check-update'. This command is handy for users who want to see if there are any new versions of the software packages installed on their system without actually performing the updates.

When you run the 'yum check-update' command, YUM communicates with the servers that host the repositories to check for any available updates. It then generates a list of the packages that have updates available, allowing users to decide whether to proceed with the updates or not.

It's important to note that the 'yum update' command is used to update all current software packages to their latest versions. There is no separate command such as 'yum update all' or 'yum update system' in YUM.

Remember, when working with YUM commands, it's crucial to execute them as a superuser or with sudo privileges to avoid any permission issues.

For those interested in exploring more YUM commands and their functionalities, further reading and practice can help solidify your understanding of package management in Linux systems.