$!是什么意思啊？

wawxdyy

另外$@和$*的区别怎么才能体现出来呢？谢谢

Jockey

关于定义问题，最好查手册。耐心点。
对于 @ 和 * 这两个特殊参量的区别，好在 bash(1) 里也说得相当清楚了。

iso

$!  在后台运行的最后的工作的PID(进程ID)
$@与$*同义,但是每个参数都是一个独立的""引用字串,这就意味着参数被完整地传递,并没有被解释和扩展。
刚好在看SAMS-Linux_Shell_Scripting_With_Bash，粘上来给你参考
Although both $@ and $* refer to all the parameters, they differ when they are enclosed in double quotes. $* parameters are separated by the first character of the IFS variable, or by spaces if IFS is empty, or without anything when IFS is unset. $* treats the set of parameters as a single group.
$@, on the other hand, always separates the parameters by spaces and treats the parameters as individual items, even when they are enclosed in double quotes. $@ is often used to transfer the entire set of switches to another command (for example, ls $@).

netman網中人

http://bbs.chinaunix.net/viewthr ... p;page=7#pid1628522

flf21

Post by netman網中人;1795020
http://bbs.chinaunix.net/viewthr ... p;page=7#pid1628522

那里都有你的身影。。。:cool:

wawxdyy

谢谢各位，非常感谢

yueliangdao0608

网中人士非常厉害的。