Code:
(root@W003)-(/var/log) $ ls -al
total 9340
drwxr-xr-x 8 root root 4096 Sep 22 06:26 .
drwxr-xr-x 14 root root 4096 Mar 30 09:16 ..
drwxr-x--- 4 root adm 20480 Sep 21 19:52 apache2
drwxr-xr-x 2 root root 4096 Sep 1 06:25 apt
-rw-r--r-- 1 root root 0 Sep 22 06:25 aptitude
-rw-r--r-- 1 root root 474 Sep 21 21:49 aptitude.1.gz
-rw-r----- 1 root adm 59227 Sep 22 19:56 auth.log
-rw-r----- 1 root adm 5538227 Sep 22 06:25 auth.log.0
-rw-r----- 1 root adm 597426 Sep 21 21:49 auth.log.1.gz
-rw-r----- 1 root adm 139250 Sep 21 21:49 auth.log.2.gz
-rw-r----- 1 root adm 68840 Sep 21 21:49 auth.log.3.gz
-rw-r----- 1 root adm 127331 Sep 21 21:49 auth.log.4.gz
-rw-r----- 1 root adm 503441 Sep 21 21:49 auth.log.5.gz
-rw-r----- 1 root adm 110093 Sep 21 21:49 auth.log.6.gz
-rw-r----- 1 root adm 0 Sep 21 21:49 boot
-rw-rw---- 1 root utmp 0 Sep 21 21:49 btmp
-rw-rw---- 1 root utmp 0 Sep 21 21:49 btmp.1
-rw-r--r-- 1 root root 8292 Sep 21 21:49 chkrootkit.log
-rw-r----- 1 root adm 59784 Sep 22 19:46 daemon.log
-rw-r----- 1 root adm 54878 Sep 21 21:49 daemon.log.0
-rw-r----- 1 root adm 12772 Sep 21 21:49 daemon.log.1.gz
-rw-r----- 1 root adm 7170 Sep 21 21:49 daemon.log.2.gz
-rw-r----- 1 root adm 7299 Sep 21 21:49 daemon.log.3.gz
-rw-r----- 1 root adm 12508 Sep 21 22:58 debug
-rw-r----- 1 root adm 1020 Sep 21 21:49 debug.0
-rw-r----- 1 root adm 1424 Sep 21 21:49 debug.1.gz
-rw-r----- 1 root adm 147 Sep 21 21:49 debug.2.gz
-rw-r----- 1 root adm 1196 Sep 21 21:49 debug.3.gz
-rw-r----- 1 root adm 20171 Sep 22 01:00 dmesg
-rw-r----- 1 root adm 20172 Sep 21 21:49 dmesg.0
-rw-r----- 1 root adm 6835 Sep 21 21:49 dmesg.1.gz
-rw-r----- 1 root adm 6612 Sep 21 21:49 dmesg.2.gz
-rw-r----- 1 root adm 6421 Sep 21 21:49 dmesg.3.gz
-rw-r----- 1 root adm 28 Sep 21 21:49 dmesg.4.gz
-rw-r----- 1 root adm 20370 Sep 21 21:49 dpkg.log
-rw-r----- 1 root adm 19177 Sep 21 21:49 dpkg.log.1
-rw-r----- 1 root adm 1558 Sep 21 21:49 dpkg.log.2.gz
-rw-r----- 1 root adm 1456 Sep 21 21:49 dpkg.log.3.gz
-rw-r----- 1 root adm 10001 Sep 21 21:49 dpkg.log.4.gz
-rw-r--r-- 1 root root 64128 Sep 21 22:42 faillog
drwxr-xr-x 2 root root 4096 Mar 26 18:12 fsck
drwxr-xr-x 3 root root 12288 Sep 22 06:25 ispcp
-rw-r----- 1 root adm 65749 Sep 22 11:52 kern.log
-rw-r----- 1 root adm 1020 Sep 21 21:49 kern.log.0
-rw-r----- 1 root adm 7763 Sep 21 21:49 kern.log.1.gz
-rw-r----- 1 root adm 195 Sep 21 21:49 kern.log.2.gz
-rw-r----- 1 root adm 150 Sep 21 21:49 kern.log.3.gz
-rw-rw-r-- 1 root utmp 585168 Sep 22 19:56 lastlog
-rw-r--r-- 1 root root 0 Sep 21 21:49 lpr.log
-rw-r----- 1 root adm 0 Sep 21 21:49 mail.err
-rw-r----- 1 root adm 402 Sep 21 21:49 mail.err.0
-rw-r----- 1 root adm 5608 Sep 21 21:49 mail.err.1.gz
-rw-r----- 1 root adm 143 Sep 21 21:49 mail.err.2.gz
-rw-r----- 1 root adm 530 Sep 21 21:49 mail.err.3.gz
-rw-r----- 1 root adm 132543 Sep 22 15:23 mail.info
-rw-r----- 1 root adm 76570 Sep 21 21:49 mail.info.0
-rw-r----- 1 root adm 4483 Sep 21 21:49 mail.info.1.gz
-rw-r----- 1 root adm 5240 Sep 21 21:49 mail.info.2.gz
-rw-r----- 1 root adm 13907 Sep 21 21:49 mail.info.3.gz
-rw-r----- 1 root adm 6705 Sep 21 21:49 mail.info.4.gz
-rw-r----- 1 root adm 19607 Sep 21 21:49 mail.info.5.gz
-rw-r----- 1 root adm 6431 Sep 21 21:49 mail.info.6.gz
-rw-r----- 1 root adm 341596 Sep 22 15:23 mail.log
-rw-r----- 1 root adm 96089 Sep 21 21:49 mail.log.0
-rw-r----- 1 root adm 4532 Sep 21 21:49 mail.log.1.gz
-rw-r----- 1 root adm 5514 Sep 21 21:49 mail.log.2.gz
-rw-r----- 1 root adm 26806 Sep 21 21:49 mail.log.3.gz
-rw-r----- 1 root adm 6950 Sep 21 21:49 mail.log.4.gz
-rw-r----- 1 root adm 38268 Sep 21 21:49 mail.log.5.gz
-rw-r----- 1 root adm 6524 Sep 21 21:49 mail.log.6.gz
-rw-r----- 1 root adm 982 Sep 22 01:00 mail.warn
-rw-r----- 1 root adm 956 Sep 21 21:49 mail.warn.0
-rw-r----- 1 root adm 821 Sep 21 21:49 mail.warn.1.gz
-rw-r----- 1 root adm 528 Sep 21 21:49 mail.warn.2.gz
-rw-r----- 1 root adm 419 Sep 21 21:49 mail.warn.3.gz
-rw-r----- 1 root adm 58256 Sep 22 19:38 messages
-rw-r----- 1 root adm 16906 Sep 21 21:49 messages.0
-rw-r----- 1 root adm 7653 Sep 21 21:49 messages.1.gz
-rw-r----- 1 root adm 1518 Sep 21 21:49 messages.2.gz
-rw-r----- 1 root adm 1358 Sep 21 21:49 messages.3.gz
drwxr-s--- 2 mysql adm 4096 Mar 30 09:16 mysql
-rw-r----- 1 mysql adm 0 Sep 21 21:49 mysql.err
-rw-r----- 1 mysql adm 0 Sep 22 06:25 mysql.log
-rw-r----- 1 mysql adm 20 Sep 21 21:49 mysql.log.1.gz
-rw-r----- 1 mysql adm 20 Sep 21 21:49 mysql.log.2.gz
-rw-r----- 1 mysql adm 20 Sep 21 21:49 mysql.log.3.gz
-rw-r----- 1 mysql adm 20 Sep 21 21:49 mysql.log.4.gz
-rw-r----- 1 mysql adm 20 Sep 21 21:49 mysql.log.5.gz
-rw-r----- 1 mysql adm 20 Sep 21 21:49 mysql.log.6.gz
-rw-r----- 1 mysql adm 20 Sep 21 21:49 mysql.log.7.gz
drwxr-xr-x 2 root root 4096 Sep 22 06:25 proftpd
-rw------- 1 root root 101501 Sep 22 06:26 rkhunter.log
-rw------- 1 vu2000 root 96385 Sep 21 21:49 rkhunter.log.old
-rw-r----- 1 root adm 36546 Sep 22 19:50 syslog
-rw-r----- 1 root adm 490388 Sep 22 06:26 syslog.0
-rw-r----- 1 root adm 6941 Sep 21 21:49 syslog.1.gz
-rw-r----- 1 root adm 6515 Sep 21 21:49 syslog.2.gz
-rw-r----- 1 root adm 7025 Sep 21 21:49 syslog.3.gz
-rw-r----- 1 root adm 9646 Sep 21 21:49 syslog.4.gz
-rw-r----- 1 root adm 5916 Sep 21 21:49 syslog.5.gz
-rw-r----- 1 root adm 6888 Sep 21 21:49 syslog.6.gz
-rw-r--r-- 1 root root 0 Sep 21 21:49 user.log
-rw-r--r-- 1 root root 0 Sep 21 21:49 uucp.log
-rw-rw-r-- 1 root utmp 35712 Sep 22 19:56 wtmp
-rw-rw-r-- 1 root utmp 4224 Sep 21 21:49 wtmp.1
(root@W003)-(/var/log) $
Which of those???
Do u want to check them by yourself, please?
Thank you