[title]清除登陆系统成功的记录[/title]
[[email protected] root]#?echo > /var/log/wtmp?//此文件默认打开时乱码，可查到ip等信息
[[email protected] root]#?last?//此时即查不到用户登录信息
[title]清除登陆系统失败的记录[/title]
[[email protected] root]#?echo > /var/log/btmp?//此文件默认打开时乱码，可查到登陆失败信息
[[email protected] root]#?lastb?//查不到登陆失败信息
[title]清除历史执行命令[/title]
[[email protected] root]#?history -c?//清空历史执行命令
[[email protected] root]#?echo > ./.bash_history?//或清空用户目录下的这个文件即可
[title]导入空历史记录[/title]
[[email protected] root]#?vi /root/history?//新建记录文件
[ro[email protected] root]#?history -c?//清除记录
[[email protected] root]#?history -r /root/history.txt?//导入记录
[[email protected] root]#?history?//查询导入结果
[title]示例： [/title]
[[email protected] root]#?vi /root/history
[[email protected] root]#?history -c
[[email protected] root]#?history -r /root/history.txt
[[email protected] root]#?history
[[email protected] root]#?echo > /var/log/wtmp
[[email protected] root]#?last
[[email protected] root]#?echo > /var/log/btmp
[[email protected] root]#?lastb
[[email protected] root]#?history -c
[[email protected] root]#?echo > ./.bash_history
[[email protected] root]#?history
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