Syslogd. Tracking system events. Log servers. Applications are constantly encountering events which should be recorded users attempt to login with bad passwords servers can’t properly start disk runs out of space and others
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Tracking system events
# from /etc/syslog.conf
logs this level and higher priority
logs ONLY this level
logs NOT this level and higher priority (but all below)
logs NOT this level but ALL OTHER LEVELS
# Kernel messages are first, stored in the kernel
# file, critical messages and higher ones also go
# to another host and to the console
(info thru warning)
Feb 10 17:24:58 testserver sshd: Could not reverse map address 192.168.2.2.
Feb 10 17:24:59 testserver sshd: Accepted password for dgame from 192.168.2.2 port 1186 ssh2
Feb 10 17:25:00 testserver sshd(pam_unix): session opened for user dgame by (uid=501)
Feb 10 17:25:05 testserver su(pam_unix): session opened for user root by dgame(uid=501)