查看“每天一命令之history”的源代码

[[category:devops]][[category:linux]] [[category:shell]]
=history=
==DESCRIPTION==
<pre>
DESCRIPTION
       Many  programs  read input from the user a line at a time.  The GNU History library is able to keep track of those lines,
       associate arbitrary data with each line, and utilize information from previous lines in composing new ones.

</pre>

=OPTIONS=
<pre>
   -c	清空当前历史命令 clear the history list by deleting all of the entries
  -d offset	删除历史记录中第offset个命令 delete the history entry at position OFFSET. Negative
    		offsets count back from the end of the history list


-N: 显示历史记录中最近的N个记录；

-a：将历史命令缓冲区中命令写入历史命令文件中；
-r：将历史命令文件中的命令读入当前历史命令缓冲区；
-w：将当前历史命令缓冲区命令写入历史命令文件中;

-n<filename>：读取指定文件

</pre>
=完全清除命令执行操作的历史记录=
<pre>
1.清理历史记录（只是清理了表层，可在.bash_history找到回）
history -c


2.清理记录历史的记录文件内容

echo " " > .bash_history 
echo >  ~/.bash_history
</pre>

=see also=
[https://blog.csdn.net/GX_1_11_real/article/details/80364246 Linux中history配置及使用技巧]

[https://www.cnblogs.com/ljs05/p/7374707.html history命令]