[root@linux ~]# history [n]
[root@linux ~]# history [-c]
[root@linux ~]# history [-raw] histfiles
Parameters：
-n ：number, meaning ' the n command to list the most recent list ' means!
-c ：All the history in the current shell delete all content
-a ：Will be added into the history currently added instruction in histfiles, if not histfiles, then the ...