在bash中运行命令，而不保存在历史logging中

在命令之前添加空格。 以空格开始的命令不会放入历史logging中：

root@ubuntu-1010-server-01:~# echo foo foo root@ubuntu-1010-server-01:~# history 1 echo foo 2 history root@ubuntu-1010-server-01:~# echo bar bar root@ubuntu-1010-server-01:~# history 1 echo foo 2 history 

男子bash

  HISTCONTROL A colon-separated list of values controlling how commands are saved on the history list. If the list of values includes ignorespace, lines which begin with a space character are not saved in the history list. A value of ignoredups causes lines matching the previous history entry to not be saved. A value of ignoreboth is shorthand for ignorespace and ignoredups. A value of erasedups causes all previous lines matching the cur‐ rent line to be removed from the history list before that line is saved. Any value not in the above list is ignored. If HISTCONTROL is unset, or does not include a valid value, all lines read by the shell parser are saved on the history list, subject to the value of HISTIGNORE. The second and subsequent lines of a multi-line compound command are not tested, and are added to the history regardless of the value of HISTCONTROL. 

另外值得一提的是杀死当前login会话而不是正常退出的技巧（因此不能保存历史logging）。 当你login到一个共享的a / c时，这是非常有用的，而不是记住以空格作为前缀，你可以通过杀死它来结束会话。 最简单的方法是运行这个命令：

 kill -9 0 

PID 0总是指当前进程的PID，所以你基本上是发送一个致命的kill信号给自己。 我也经常使用这个，而不是正常退出，因为我经常挂断正常退出会话，可能是由于一些错误的configuration。

另一个解决scheme是将历史文件设置为一个目录：

 export HISTFILE=/