shell - Unix shell 中的特殊变量？

Question

已结束。此问题正在寻求书籍、工具、软件库等的推荐。它不满足 Stack Overflow guidelines 。目前不接受答案。

---

我们不允许提出寻求书籍、工具、软件库等推荐的问题。您可以编辑问题，以便用事实和引文来回答。

已关闭 4 年前。

Improve this question

我需要关于 Unix shell 特殊变量(csh、ksh 和 bash)的良好引用。

例如$1 , $* , $#等

Answer 1

这里:http://sillydog.org/unix/scrpt/scrpt2.2.2.php

$1 - $9 these variables are the positional parameters.

$0 the name of the command currently being executed.

$# the number of positional arguments given to this invocation of the shell.

$? the exit status of the last command executed is given as a decimal string. When a command completes successfully, it returns the exit status of 0 (zero), otherwise it returns a non-zero exit status.

$$ the process number of this shell - useful for including in filenames, to make them unique.

$! the process id of the last command run in the background.

$- the current options supplied to this invocation of the shell.

$* a string containing all the arguments to the shell, starting at $1.

$@ same as above, except when quoted.

更多资源:

• http://linuxshellaccount.blogspot.com/2008/04/shell-special-variables-in-bash.html
• http://www.tutorialspoint.com/unix/unix-special-variables.htm