API Gateway Appliance Form-Factor Boots into Emergency Mode (Control D) on the OS:
This is caused by some corruption on the filesystem due to an ungraceful shutdown or other issue which caused the file system to become corrupt.
Release : CA API Gateway Appliance Form Factor
Log into the Control D emergency mode and run FSCK to rectify the corrupted files
Please see the Additional Information section below for FSCK command help or use your preferred Linux administration reference material