[linux shell]if -else 例子
#ifelse_exam.sh脚本用于检查输入的字符串是否是一个当前目录#!/bin/bash
#测试用户输入是否为空,然后判断当前目录是否存在该文件
if [ "$1" ]
then
echo "What you input is not null"
if [ -e "$1" ]
then
echo "The file $1 is existence!"
else
echo "The file $1 is not existence!"
fi
else
echo "What you input is null!"
fi
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