[oracle@ora10g 2912]$ cd fd
[oracle@ora10g fd]$ ls -ltr
total 0
lr-x------ 1 oracle oinstall 64 Aug 25 12:51 0 -> /dev/null
l-wx------ 1 oracle oinstall 64 Aug 25 12:51 6 -> /u01/app/oracle/admin/ora10g/bdump/alert_ora10g.log
l-wx------ 1 oracle oinstall 64 Aug 25 12:51 5 -> /u01/app/oracle/admin/ora10g/udump/ora10g_ora_2904.trc
lr-x------ 1 oracle oinstall 64 Aug 25 12:51 4 -> /dev/null
lr-x------ 1 oracle oinstall 64 Aug 25 12:51 3 -> /dev/null
lr-x------ 1 oracle oinstall 64 Aug 25 12:51 2 -> /dev/null
lr-x------ 1 oracle oinstall 64 Aug 25 12:51 1 -> /dev/null
lrwx------ 1 oracle oinstall 64 Aug 25 12:51 9 -> /u01/app/oracle/product/10.2.0/db_1/dbs/hc_ora10g.dat
l-wx------ 1 oracle oinstall 64 Aug 25 12:51 8 -> /u01/app/oracle/admin/ora10g/bdump/alert_ora10g.log
lrwx------ 1 oracle oinstall 64 Aug 25 12:51 7 -> /u01/app/oracle/product/10.2.0/db_1/dbs/lkinstora10g (deleted)
lrwx------ 1 oracle oinstall 64 Aug 25 12:51 23 -> /u01/app/oracle/oradata/ora10g/temp01.dbf (deleted)
lrwx------ 1 oracle oinstall 64 Aug 25 12:51 22 -> /u01/app/oracle/oradata/ora10g/example01.dbf (deleted)
lrwx------ 1 oracle oinstall 64 Aug 25 12:51 20 -> /u01/app/oracle/oradata/ora10g/sysaux01.dbf (deleted)
lrwx------ 1 oracle oinstall 64 Aug 25 12:51 19 -> /u01/app/oracle/oradata/ora10g/undotbs01.dbf (deleted)
lrwx------ 1 oracle oinstall 64 Aug 25 12:51 18 -> /u01/app/oracle/oradata/ora10g/system01.dbf (deleted)
lrwx------ 1 oracle oinstall 64 Aug 25 12:51 17 -> /u01/app/oracle/oradata/ora10g/control03.ctl (deleted)
lrwx------ 1 oracle oinstall 64 Aug 25 12:51 16 -> /u01/app/oracle/oradata/ora10g/control02.ctl (deleted)
lrwx------ 1 oracle oinstall 64 Aug 25 12:51 15 -> /u01/app/oracle/oradata/ora10g/control01.ctl (deleted)
lrwx------ 1 oracle oinstall 64 Aug 25 12:51 14 -> /u01/app/oracle/product/10.2.0/db_1/dbs/lkORA10G
lrwx------ 1 oracle oinstall 64 Aug 25 12:51 13 -> /u01/app/oracle/product/10.2.0/db_1/dbs/hc_ora10g.dat
lr-x------ 1 oracle oinstall 64 Aug 25 12:51 12 -> /dev/zero
lr-x------ 1 oracle oinstall 64 Aug 25 12:51 11 -> /dev/zero
lrwx------ 1 oracle oinstall 64 Aug 25 12:51 10 -> /u01/app/oracle/admin/ora10g/adump/ora_2904.aud
[oracle@ora10g fd]$
分析：可以看句柄7,15-23的文件末尾被标记(deleted)，这是由刚才的rm -rf操作所导致的，误删除后只要Oracle数据库未重启，进程就不会停止，那么就可以通过/proc/#oracle进程号/fd目录中的文件句柄号，来对这些被delete的文件进行恢复，方法就是cp文件句柄到原路径，注意一点这里如果不是在fd目录，那就要用绝对路径来指定文件句柄，如果删除文件后就，又对数据库进行了关闭操作，那就无解了