shell中的一些技巧和知识

写了两天脚本，不懂什么就网上搜，感觉零零碎碎学了不少东西，先把代码贴上来，明天周末有空一条一条找知识点吧

#!/bin/bash
# by wuboxiao

rm -rf checkConfig.diff checkConfig.same checkConfig.error checkConfig.result
files=`find $1/src/main/resources/performance -name "*.properties"`
for i in $files;do
    diff $i ${i/performance/stable} 1>>checkConfig.result 2>>checkConfig.result
    if [ $? -eq 0 ]; then
       echo $i,${i/performance/stable} 1>>checkConfig.same
    else
       diff $i ${i/performance/stable} -y 1>>checkConfig.result 2>>checkConfig.result
       if [ $? -eq 1 ];then  
          echo $i,${i/performance/stable} 1>>checkConfig.diff
          diff $i ${i/performance/stable} -y --suppress-common-lines 1>>checkConfig.diff
       elif [ $? -eq 2 ];then 
          echo "结果为2"
       else  diff $i ${i/performance/stable} -y 2>>checkConfig.error
       fi
       echo -e "\n+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    fi
done
echo -e "\e[1;31m配置文件缺失检查结果:\e[0m"
if [ ! -f checkConfig.error ];then 
   echo "无配置文件缺失"
 else cat checkConfig.error
fi
echo -e "\e[1;31m配置文件不同检查结果:\e[0m"
if [ ! -f checkConfig.diff ];then 
   echo "无不同的配置文件"
else cat checkConfig.diff
fi
 if [ $# -eq 2 ];then
   echo -e "\e[1;31m配置文件相同检查结果:\e[0m"
   if [ ! -f checkConfig.same ];then 
      echo "无相同的配置文件"
   else cat checkConfig.same
 fi
fi