清除Centos系统用户登录记录和命令记录

1 2	echo>/var/log/wtmp#清除用户登录记录和命令记录 [root @localhost root]# last //此时即查不到用户登录信息

1 2	echo>/var/log/btmp [root @localhost root]# lastb //查不到登陆失败信息

1	echo>/var/log/secure #如果没有这个文件，重启syslog进程service syslog restart

清除历史命令

1 2	cd/root/ echo> .bash_history

或者

1	history-c #清除命令记录

也可以写个shell脚本，一键清除所有的日志

1 2 3 4 5 6 7 8 9 10 11 12 13

#!/bin/sh cat/dev/null>/var/log/syslog cat/dev/null>/var/adm/sylog cat/dev/null>/var/log/wtmp cat/dev/null>/var/log/maillog cat/dev/null>/var/log/messages cat/dev/null>/var/log/openwebmail.log cat/dev/null>/var/log/maillog cat/dev/null>/var/log/secure cat/dev/null>/var/log/httpd/error_log cat/dev/null>/var/log/httpd/ssl_error_log cat/dev/null>/var/log/httpd/ssl_request_log cat/dev/null>/var/log/httpd/ssl_access_log