OS Versions and Security Updates

Ensure that your operating systems for VM, OVA, and Server deployments are up to date.

```bash
sudo apt update && sudo apt upgrade -y && reboot

Note

For best results,

Perform this task for all non-TPVM deployment models on a regular basis.
Disable unattended upgrade services on external servers.
As a best practice, ensure that no additional (supplemental) packages are installed on any Ubuntu server with EFA or XCO installed.
Ensure that no locks are held on the Debian packages in the nodes. Verify this by running the following command:
```
lsof /var/lib/dpkg/lock-frontend
```
- If any locks are held, terminate the processes using their PIDs with the kill command.
```
kill <pid>
```
- Then, complete the following steps:
  1. Remove the lock file.
```
rm /var/lib/dpkg/lock-frontend
```
  2. Configure the packages.
```
dpkg --configure -a
```