Level 1 Workstation Server Initial Setup Configure Software Updates Manual IG1 IG2 IG3 7.3 Perform Automated Operating System Patch Management T1068 T1195 T1195.001 T1195.002 T1203 T1210 T1211 T1212 TA0001 M1051 1.2.1 Ensure package manager repositories are configured Audit# Run the following command and verify package repositories are configured correctly: # apt-cache policy Remediation# Configure your package manager repositories according to site policy.