说明：  Linux用户操作记录一般通过命令history来查看历史记录，但是如果因为某人误操作了删除了重要的数据，这种情况下history命令就不会有什么作用了。以下方法可以实现通过记录登陆IP地址和所有用户登录所操作的日志记录！ ip_check检查记录登陆者IP地址~~~
(Linux user operating records typically look at history through command history, but in this case, the history command will not work if someone has deleted important data by mistake. The following methods can be implemented by logging the login IP address and logging records of all user logs!)