You can see various logs using the show log command.

Basic Command

LYSH@MyHostName# show log {name} [-h] [-n NUMBER] [-w] [keyword]
optional arguments:
  -h, --help                      show this help message and exit
  -n [NUMBER], --number [NUMBER]  enter 0 to show all logs, and enter a value greater than 0 to show as much as the value entered
  -w, --watch                     show the log or setup status in real time

If you want to see logs for a specific service, you ensure that the Runtime Log is enabled or not.

Display logs

LYSH@MyHostName# show log apache2		// Display all apache2 logs
LYSH@MyHostName# show log radius		// Display all radius logs

Display last n logs

LYSH@MyHostName# show log apache2 -n 10		// Display only the last 10 apache2 logs
LYSH@MyHostName# show log radius -n 10		// Display only the last 10 radius logs

Display last n logs with keyword

LYSH@MyHostName# show log apache2 -n 10	request	// Display only the last 10 apache2 logs filtered by "request" 
LYSH@MyHostName# show log radius -n 10	accept	// Display only the last 10 radius logs filtered by "request" 

Display logs in real-time

LYSH@MyHostName# show log apache2 -w		// Display the apache2 logs in real-time
LYSH@MyHostName# show log radius -w		// Display the radius logs in real-time

Display logs in real-time with keyword

LYSH@MyHostName# show log apache2 -w request	// Display the apache2 logs filtered by "request" in real-time
LYSH@MyHostName# show log radius -w accept	// Display the radius logs filtered by "accept" in real-time

keyword

The & is the Logical AND operator and the | is the Logical OR operator.

LYSH@MyHostName# show log request&reply		// Display the apache2 logs having both "request" and "reply"
LYSH@MyHostName# show log request|reply		// Display the apache2 logs having either "request" or "reply"