[root@fbsa ~]# du -sh /var/log/*
28M     /var/log/audit
44K     /var/log/bandwidth
12K     /var/log/boot.log
37M     /var/log/btmp
19M     /var/log/btmp-20161001
176M    /var/log/chkservd.log
80K     /var/log/cloud-init.log
56K     /var/log/cloud-init-output.log
2.8M    /var/log/cpanel-install.log
4.0K    /var/log/cpanel-install.log.1468426112
4.0K    /var/log/cpanel-install.log.1468426168
2.6M    /var/log/cron
972K    /var/log/cron-20161003
700K    /var/log/cron-20161009
1.5M    /var/log/cron-20161017
1.4M    /var/log/cron-20161023
2.1M    /var/log/cron-20161030
1.7M    /var/log/dcpumon
32K     /var/log/dmesg
32K     /var/log/dmesg.old
20G     /var/log/exim_mainlog
182M    /var/log/exim_mainlog-20161003.gz
2.6G    /var/log/exim_mainlog-20161009
242M    /var/log/exim_mainlog-20161017.gz
183M    /var/log/exim_mainlog-20161023.gz
2.2G    /var/log/exim_mainlog-20161030
4.3M    /var/log/exim_mainlog-20161031.gz
210M    /var/log/exim_paniclog
11M     /var/log/exim_paniclog-20161003.gz
624K    /var/log/exim_paniclog-20161009
4.0K    /var/log/exim_paniclog-20161017.gz
4.0M    /var/log/exim_paniclog-20161023.gz
34M     /var/log/exim_paniclog-20161030
4.0K    /var/log/exim_paniclog-20161031.gz
98M     /var/log/exim_rejectlog
1.7M    /var/log/exim_rejectlog-20161003.gz
44K     /var/log/exim_rejectlog-20161009
16K     /var/log/exim_rejectlog-20161017.gz
1.5M    /var/log/exim_rejectlog-20161023.gz
13M     /var/log/exim_rejectlog-20161030
4.0K    /var/log/exim_rejectlog-20161031.gz
40K     /var/log/lastlog
1.6G    /var/log/maillog
135M    /var/log/maillog-20161009
165M    /var/log/maillog-20161017
122M    /var/log/maillog-20161023
146M    /var/log/maillog-20161031
108M    /var/log/messages
70M     /var/log/messages-20161009
81M     /var/log/messages-20161017
42M     /var/log/messages-20161023
61M     /var/log/messages-20161031
8.0K    /var/log/named
2.3G    /var/log/nginx
4.0K    /var/log/nscd.log
4.0K    /var/log/ppp
40K     /var/log/quota_enable.log
23M     /var/log/sa
24M     /var/log/secure
1.5M    /var/log/secure-20161009
3.4M    /var/log/secure-20161017
2.4M    /var/log/secure-20161023
2.1M    /var/log/secure-20161031
0       /var/log/tallylog
40K     /var/log/tuned
100K    /var/log/wtmp
4.0K    /var/log/xferlog.offset
4.0K    /var/log/xferlog.offsetftpsep
28K     /var/log/yum.log