LogLevel

https://linux.die.net/man/5/sshd_config

LogLevel
Gives the verbosity level that is used when logging messages from sshd(8). The possible values are: QUIET, FATAL, 
ERROR, INFO, VERBOSE, DEBUG, DEBUG1, DEBUG2, and DEBUG3. The default is INFO. DEBUG and DEBUG1 are equivalent. 
DEBUG2 and DEBUG3 each specify higher levels of debugging output. Logging with a DEBUG level violates the privacy 
of users and is not recommended

Related terms

• sshd -t
• Subsystem, internal-sftp

See also

• sshd, sshd logs, sshd -t, sshd -T, sshd_config, sftp