MySQL去掉mysql: [Warning] Using a password on the command line interface can be insecure.

去掉mysql: [Warning] Using a password on the command line interface can be insecure.

5.7版本使用mysql执行sql命令都会有这行，去掉方法重定向

echo "select version()"|mysql -S /tmp/mysql3306.sock -uroot -ppassword 2>/dev/null