Linux command: cd的一些小技巧

时间长了不用都忘了, 还是记一下吧~

 

cd -          #回到上次所在目录，这个技巧我原来还真是不知道，感觉还是比较有用，省略了很多输入。

cd !$        #把上个命令的最后一个参数作为输入。

cd            #回到主目录

cd ~         #同样也是回到主目录

 

另外, 为什么!$能达到上面所述的效果呢.

原因可以Mendel Cooper的参考这个链接

Advanced Bash-Scripting Guide => An in-depth exploration of the art of shell scripting

里面这样介绍 !

!
reverse (or negate) the sense of a test or exit status [bang]. The ! operator inverts the exit status of the command to which it is applied (see Example 6-2). It also inverts the meaning of a test operator. This can, for example, change the sense of equal ( = ) to not-equal ( != ). The ! operator is a Bash keyword.

In a different context, the ! also appears in indirect variable references.

In yet another context, from the command line, the ! invokes the Bash history mechanism (see Appendix L). Note that within a script, the history mechanism is disabled.

 

关于使用!去引用bash history的详细链接如下:

里面还有!的其他用法, 需要的自行参考吧.

http://tldp.org/LDP/abs/html/abs-guide.html#HISTCOMMANDS