Shell脚本总结

#!/bin/sh

test_for()
{
        echo "=========test for===="
        for i in {1..5}
        do
          echo "$i"
        done

        for file in `ls ..`
        do
          if [ -f ../${file} ];then
                echo "fileName:${file}"
          fi
        done
}

test_while()
{
        echo "=========test while===="
        i=1                 ####变量定义时 等号左右两边不可以由空格
        while [ ${i} -le 5 ]
        do
          echo "$i"
          i=`expr ${i} + 1`
        done

　　　　　dos2unix input.txt
        while read line
        do
           if [ "X" == "X${line}" ];then   #######if语句的判断表达式一定要注意保留空格
                        continue;
           fi
           echo "${line}"
        done < input.txt
}

main()
{
  test_for

  test_while
}

main $@