ERROR 2006 (HY000) at line 1: MySQL server has gone away

-- the command of slow.sh was failed

ERROR 2006 (HY000) at line 1: MySQL server has gone away
ERROR 2006 (HY000) at line 1: MySQL server has gone away
cp: missing destination file operand after `.0402_0800'
Try `cp --help' for more information.
cp: missing destination file operand after `/dev/null'
Try `cp --help' for more information.

猜测应该是密码错误导致的登陆故障, 仔细监测运行slow的脚本,发现如下语句

slowlog_dir=`$MYSQL_HOME/bin/mysql -N -e "show variables like 'slow_query_log_file'"|awk '{print $2}'| cut -f1-3 -d '/'`

没有代入用户名密码,如果加上用户名密码参数.那么就OK了!