Linux? Linux , . .
Linux ASCII /var/log
. Linux, syslogd
rsyslogd
.
, Linux, .

Linux
1. Linux root. root-.
2. :
cd /var/log
3. , :
ls
Linux, kern.log
boot.log
. .

root. , root - , Linux.
:
sudo less [log name here].log
, .
, , :
Linux
. .
:
- (System Logs)
- (Event Logs)
- (Application Logs)
- (Service Logs)
var/log
.
Linux. . :
/var/log/syslog
: (/var/log/messages
)/var/log/boot.log
: , ,/var/log/auth.log
: , , (/var/log/secure
)/var/log/httpd/
: Apache/var/log/mysqld.log
: MySQL/var/log/debug
: , , ,/var/log/daemon.log
: , , Linux/var/log/maillog
: , ,/var/log/kern.log
: , Linux/var/log/yum.log
: Yum/var/log/dmesg
:/var/log/boot.log
:/var/log/cron
: crond
syslogd
syslogd, /etc/syslogd.conf
/etc/syslog
. . syslogd . . :
Dec 19 15:12:42 backup.main.merionet.ru sbatchd[495]: sbatchd/main: ls_info() failed: LIM is down; try later; trying ... Dec 19 15:14:28 system.main.merionet.ru pop-proxy[27283]: Connection from 186.115.198.84 Dec 19 15:14:30 control.main.merionet.ru pingem[271] : office.main.merionet.ru has not answered 42 times Dec 19 15:15:05 service.main.merionet.ru vmunix: Multiple softerrors: Seen 100Corrected Softerrors from SIMM J0201 Dec 19 15:15:16 backup.main.merionet.ru PAM_unix[17405]: (sshd) session closed 'for user trent
, . , .
, , CUPS, Rootkit Hunter, HTTP- Apache, SMB- Samba X11.
. . . , .
Linux. , Linux.
Linux
System Log Viewer - , .
, . .
Xlogmaster, .
Xlogmaster . , .
Ubuntu CentOS
CentOS. , Linux, who
root:

. :
last reboot

, :
lastlog

, , . , .
, . logrotate
. , .
logrotate , . cron logrotate /etc/logrotate.conf
. logrotate.
logrotate, :
var/log/log name here].log { Missingok Notifempty Compress Size 20k Daily Create 0600 root root }
.
:
missingok
- logrotate , .notifempty
- , . gzipsize
- , ,daily
- . .create
- , root
, Linux, Linux. .