About redirect log in rsyslog.conf

Question

what is the difference between this 2 lines:

mail.warn           -/var/log/mail.warn
mail.err            /var/log/mail.err

(with and without the -)

and who i redirect a syslog msg from a host to a specific file? ex: 192.168.0.1 to /var/log/192.168.0.1.log ?

Answer 1

The - means that file are written normally to the log file, so buffered. Without the - the file is flushed at every line, so in case of power problem, every line was already saved to disk.