shell echo -n md5sum使用方法

#!/bin/bash
MYSQL='mysql -u*** -p*** -hws5 account'
tmp="tmp"
resultsource="resultsource"
resultdest="resultdest"
echo "select user_id,phone_num,email from user_accounts where length(user_id) = 11 limit 1"|${MYSQL} > ${tmp}
sed '1d' ${tmp} > ${resultsource}
> ${resultdest} 
while read user_id phone_num email
do
  echo ${user_id} `echo ROKID${phone_num}ACCOUNT`
  echo -n ROKID${phone_num}ACCOUNT|md5sum|cut -d" " -f 1|tr [a-z] [A-Z]
  echo ${user_id} `echo -n ROKID${phone_num}ACCOUNT|md5sum|cut -d" " -f 1|tr [a-z] [A-Z]` >> ${resultdest}
done < ${resultsource}

#while read user_id phone_num_md5 
#do 
#  echo "update user_accounts set phone_num = "${phone_num_md5}" where user_id = "${user_id}"" | $MYSQL 
#done < ${resultdest}

上面红色加粗的语句，为正确的md5sum加密方法（特别注意前面echo -n 选项）

 PS:MAC下在文件中执行上面红色加粗的选项，始终不能去掉字符串后面的回车符。

可通过xxd filename

或者od -c filename 查看是否有回车符

未完待续。。。