Command to know the Patch Version

Linux and Unix-Like Red Hat
1

Hi,
Is there any command to know the patch version?Suppose i installed RTlinux patch in rethat linux.How can i know the patch version installed?Any helps appreciated.

Thanks,
Sathi.

2

This will list all the installed packages by date of installation.

rpm -q -a --list
3

Also, Most linux distributions do not have "patches" they have packages.

rpm -qla will show you what you wanted, you can grep for the package name if you know it.