摘要：#!/bin/sh if test $1 -gt 12 then echo "参数大于12!" exit else i=$1 j=1 while test $i -ne 0 do j=`expr $j \* $i` i=`expr $i -1` done echo $j fi 阅读全文

摘要：echo -e ${PATH//:/\\n} 注：bash字符串比较 阅读全文

摘要：IFS=: for dir in $PATH do 阅读全文

摘要：#!/bin/bash IFS=: while read name pass uid gid gecos home shell 阅读全文