Linux基本命令中命令 history各项命令相关代码有哪些？

Display the history list with line numbers，prefixing each modifiedentry with a`*'. An argument of N lists only the last N entries.

-c clear the history list by deleting all of th

-d offset delete the history entry at offset OFFSET.

-a append history lines from this session to the history file

-n read all history lines not already read from the history file

-r read the history file and append the contents to the history

List

-w write the current history to the history file and append them to the history iist

-p perform history expansion on each ARG and display the result without 'storing it in the history list

-s append the ARGs to the history list as a single entry

If FILENAMEis given,it is used as the history file. otherwise,if $HISTFILE has a value，that is used,else ~/.bash_history.

If the $HISTTIMEFORMAT variable is set and not nul1， its value is usedas a format string for strftime(3) to print the time stamp associated

with each displayed history entry.No time stamps are printed otherwise.Exit status :

Returns success unless an invalid option is given or an error occurs.

[root@centos7 ~]#cat .bash_history