$n $1 the first parameter,$2 the second...
$# The number of command-line parameters.
$0 The name of current program.
$? Last command or function's return value.
$$ The program's PID.
$! Last program's PID.
$@ Save all the parameters.
almost any shell book will talk about them,from which you can get their detail usages.
阅读(688) | 评论(0) | 转发(0) |
