一台服务器运行一段时间后，系统就会产生各种各样的日志，而这些日志其实暴漏了系统的很多信息，这时候就需要定期清理使用痕迹

简单的清理脚本如下

#!/bin/bash
cat?/dev/null?>?/var/log/boot.log
cat?/dev/null?>?/var/log/btmp
cat?/dev/null?>?/var/log/cron
cat?/dev/null?>?/var/log/dmesg
cat?/dev/null?>?/var/log/firewalld
cat?/dev/null?>?/var/log/grubby
cat?/dev/null?>?/var/log/lastlog
cat?/dev/null?>?/var/log/mail.info
cat?/dev/null?>?/var/log/maillog
cat?/dev/null?>?/var/log/messages
cat?/dev/null?>?/var/log/secure
cat?/dev/null?>?/var/log/spooler
cat?/dev/null?>?/var/log/syslog
cat?/dev/null?>?/var/log/tallylog
cat?/dev/null?>?/var/log/wpa_supplicant.log
cat?/dev/null?>?/var/log/wtmp
cat?/dev/null?>?/var/log/yum.log
cat?/dev/null?>?/var/log/tuned/tuned.log
rm?-f?/var/log/*-20*?>?/dev/null?2>&1
if?[?-d?"/var/log/anaconda/"?]?;?then
cat?/dev/null?>?/var/log/anaconda/anaconda.log?>?/dev/null?2>&1
cat?/dev/null?>?/var/log/anaconda/ifcfg.log?>?/dev/null?2>&1
cat?/dev/null?>?/var/log/anaconda/journal.log?>?/dev/null?2>&1
cat?/dev/null?>?/var/log/anaconda/packaging.log?>?/dev/null?2>&1
cat?/dev/null?>?/var/log/anaconda/program.log?>?/dev/null?2>&1
cat?/dev/null?>?/var/log/anaconda/storage.log?>?/dev/null?2>&1
cat?/dev/null?>?/var/log/anaconda/syslog?>?/dev/null?2>&1
cat?/dev/null?>?/var/log/anaconda/X.log?>?/dev/null?2>&1
fi
if?[?-d?"/var/log/audit/"?]?;?then
rm?-f?/var/log/audit/audit.log*?>?/dev/null?2>&1
cat?/dev/null?>?/var/log/audit/audit.log?>?/dev/null?2>&1
fi
cat?/dev/null?>?~/.bash_history
cat?/dev/null?>?~/.mysql_history
cat?/dev/null?>?~/.viminfo

最后别忘了额外运行一次 history -c 清理自己的命令列表