Clearing Appliance Logs (Appliance Disk Full)

Problem

The appliance is down, The reason is the disk is full on the appliance.

From the appliance, Run the df command to to initially check space on appliance disk looking for usage at or close to 100%

# This check the file system usage (-h just means use 1024 as the divisor for space i.e. 1K = 2024 bytes, 1Mb = 1024K etc.). 
df -h

Usage of 100% is blocking appliance stack starting

# Check if the stack can start 
sudo /opt/docker/start-appliance-stack.sh

The appliance stack cannot start.

To establish the largest directories to identify the are where all disk is consumed, run the following:

# This check the  /opt directory. 
sudo du -a /opt/ 2>/dev/null | sort -n -r | head -n 20

This main cause seems to be at a root level so identify the main targets of use

remember to check other locations as well

Clearing the Syslog will resolve the issue.