Linux系统中的history命令能够保存历史记录

所有用户执行的命令实时保存在一个文件中，文件内容如下： 2016-03-01 17:34:42 ##### USER:root IP:172.16.50.146 8160 22 PS:/dev/pts/1 ppid=2037 pwd=/root #### wget http://mirror.bit.edu.cn/apache/hadoop/common/hadoop-2.6.0/hadoop-2.6.0.tar.gz 2016-03-01 17:35:23 ##### USER:root IP:172.16.50.146 8077 22 PS:/dev/pts/0 ppid=1993 pwd=/home #### . /etc/profile 2016-03-01 17:35:29 ##### USER:root IP:172.16.50.146 8077 22 PS:/dev/pts/0 ppid=1993 pwd=/home #### pwd 2016-03-01 17:35:31 ##### USER:root IP:172.16.50.146 8077 22 PS:/dev/pts/0 ppid=1993 pwd=/root #### cd 2016-03-01 17:36:21 ##### USER:root IP:172.16.50.146 8077 22 PS:/dev/pts/0 ppid=1993 pwd=/root #### reboot