To list all outdated packages that could be updated and applied to a Linux system, you can use the yum check-update command.
For example, to list all outdated packages on a CentOS or Red Hat Enterprise Linux (RHEL) system, you can run the following command:
yum check-update
This will list all outdated packages that are available for update.
To update the outdated packages, you can use the yum update command. For example, to update all outdated packages on the system, you can use the following command:
yum update
This will update all outdated packages on the system to the latest version.
Keep in mind that you will need to have root privileges (or be a member of the sudo group) in order to use the yum command to update packages.
You can also use the yum list updates command to list all outdated packages. This command will display the package name, version, and repository for each outdated package.
For example, to list all outdated packages on a CentOS or RHEL system, you can use the following command:
yum list updates
This will list all outdated packages that are available for update on the system.