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Using System Logs

You can send system logging information to one or more destinations. The destinations can be one or more files, one or more remote hosts, the terminals of one or more users if they are logged in, and the system console.

For each place where you can send system logging information, you specify the class (facility) of messages to log and the minimum severity level (level) of the message.

Table 22 lists the system logging facilities, and Table 23 lists the system logging severity levels. For more information about system log messages, see the JUNOS System Log Messages Reference.

Table 22: System Logging Facilities

Facility	Description
any	Any facility
authorization	Any authorization attempt
change-log	Any change to the configuration
cron	Cron scheduling process
daemon	Various system processes
interactive-commands	Commands executed in the CLI
kernel	Messages generated by the JUNOS kernel
user	Messages from random user processes

Table 23: System Logging Severity Levels

Severity Level (from Highest to Lowest Severity)	Description
emergency	Panic or other conditions that cause the system to become unusable.
alert	Conditions that must be corrected immediately, such as a corrupted system database.
critical	Critical conditions, such as hard drive errors.
error	Standard error conditions.
warning	System warning messages.
notice	Conditions that are not error conditions, but that might warrant special handling.
info	Informational messages. This is the default.
debug	Software debugging messages.

This section contains the following topics:

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