Unix commands(23)

                        下面是一个更为有用的脚本showrpm，其功能是打印一些RPM包的统计信息：
                          #!/bin/sh
                          # list a content summary of a number of RPM packages
                          # USAGE: showrpm rpmfile1 rpmfile2 ...
                          # EXAMPLE: showrpm /cdrom/RedHat/RPMS/*.rpm
                            for rpmpackage in ＄*; do
　                        if [ -r "＄rpmpackage" ];then
　　                       echo "=============== ＄rpmpackage =============="
　　                        rpm -qi -p ＄rpmpackage
　                         else
　　                         echo "ERROR: cannot read file ＄rpmpackage"
　                        fi
                              done
　　                 这里出现了第二个特殊的变量＄*，该变量包含了所有输入的命令行参数值。
                        如果您运行showrpm openssh.rpm w3m.rpm webgrep.rpm
                                   此时 ＄* 包含了 3 个字符串，即openssh.rpm, w3m.rpm and webgrep.rpm.