1 ps -ef | grep dbw|grep -v grep
2 ls -rtl /proc/6877/fd
3 cd /proc/6877
4 cd fd
5 cp /proc/6877/fd/某个文件  到需要的路径下
6 查看文件状态
 select file#,status from v$datafile;
7 alter database datafile 4 offline
8 recover datafile 4
9 alter database datafile 4 online;
10 shutdown测试