bash的变量 $ @ 和 $ * 进军的命令行参数的清单。一般来说，你会希望使用$ @（即 $ @ 用双引号包围）。如果有人通过你的脚本包含参数，这种会做正确的事。

The bash variables $@ and $* expand into the list of command line arguments. Generally, you will want to use "$@" (that is, $@ surrounded by double quotes). This will do the right thing if someone passes your script an argument containing.

所以，如果你在你的脚本是这样：

So if you had this in your script:

outputfile=$1
shift
gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -sOUTPUTFILE=$outputfile "$@"

和你叫你的脚本是这样的：

And you called your script like this:

myscript out.pdf foo.ps bar.ps "another file.ps"

这将扩展为：

gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -sOUTPUTFILE=out.pdf foo.ps bar.ps "another file.ps"

阅读庆典手册页的特殊参数部分以获取更多信息。

Read the "Special Parameters" section of the bash man page for more information.