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XCCDF
Guide to the Secure Configuration of Ubuntu 16.04
System Settings
Installing and Maintaining Software
Updating Software
Ensure Software Patches Installed
Ensure Software Patches Installed
An XCCDF Rule
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Ensure Software Patches Installed
Medium Severity
If the system has an apt repository available, run the following command to install updates:
$ apt update && apt full-upgrade
NOTE: U.S. Defense systems are required to be patched within 30 days or sooner as local policy dictates.