第一个shell脚本

第一个shell脚本，直接上脚本

# /bin/sh

#if test $#  -eq 0
#then
#  echo "please input file name :"
#else
#  rm -rf  $1
#  echo "file $1 is deleted!"
#fi
declare total=0
for((index = 0; index < 5; index++))
  do
    let total=$[$total + $index] 
    echo "current total =  $total"
  done
   
echo "at last total = $total"

运行结果：

yangjianzhou@OptiPlex-9020:~$ ./test.sh 
bash: warning: setlocale: LC_ALL: cannot change locale (zh_CN.gbk)
current total =  0
current total =  1
current total =  3
current total =  6
current total =  10
at last total = 10

能运行出结果，真心不容易遇见的问题如下：
1.变量定义
2.变量初始化，=前后不能有空格
3.for循环
4.+前后要有空格
5.变量赋值，使用let