Redhat Linux Servers Patching

Question

Hi Team,

How to patch Azure Redhat linux VMs (Redhat 7.6/7.7/8.2)

Due to critically we are planning to patch linux VM one by one.

I having very good experience on Windows Servers But not Linux

Please provide the Steps:

Answer 1

@Vijay Kumar ,

As we are mainly responsible for Teams for Linux, your question is only related to Linux, which is not in our scope. I would remove office-teams-linux-itpro tag and add as not-supported tag.

Moreover, you can post a new case in Linux forum. There are many qualified respondents. Hope you get better response.

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Answer 2

If purchased from the marketplace RedHat images will already have a patch repository enabled, but you may need to allow this through your NSG or firewall. It is within microsofts default accepted ranges however, on port 443.

To try update

Login to the server and run

sudo yum clean all
sudo yum makecache
sudo yum repolist all

Check at least base-os is enabled, shown in green.

Then run

sudo yum update

This will list all patches available, press y to confirm
Please wait for all patches, ssh may disconnect do not panic, wait 15mins and try to connect again
Once you can login again, run top or ps -ef to confirm all processes have finished

Then reboot the server with

sudo reboot now

After reboot perform your checks

Sudo yum history will show the previous patches installed and if you need to remove you can use

sudo yum undo

Note upgrading this way this will upgrade your minor version and kernel but not major version, eg 7.6 will go to 7.9 but not 8.x

If you only want security patches you can use

sudo yum update-minimal --security

If you want to upgrade from 7.x to 8.x use

sudo yum upgrade