[oracle@localhost ~]$ asmcmd help=y
        commands: 
        --------  
        cd
        du
        find
        help
        ls
        lsct
        lsdg
        mkalias
        mkdir
        pwd
        rm
        rmalias

        ① 列出目录信息

ASMCMD> ls
DATA/
ASMCMD> ls -al
State    Type    Rebal  Unbal  Name
MOUNTED  NORMAL  N      N      DATA/ 

        ② 别名

ASMCMD> ls -al
Type       Redund  Striped  Time             Sys  Name
ONLINELOG  MIRROR  FINE     NOV 04 19:00:00  Y    none => group_4.256.798491239
ASMCMD> mkalias group_4.256.798491239 redo_log_group_3.log
ASMCMD> ls -al
Type       Redund  Striped  Time             Sys  Name
ONLINELOG  MIRROR  FINE     NOV 04 19:00:00  Y    +DATA/ORCL/ONLINELOG/redo_log_group_3.log => group_4.256.798491239
                                             N    redo_log_group_3.log => +DATA/ORCL/ONLINELOG/group_4.256.798491239

        ③ 查看空间

ASMCMD> du
Used_MB      Mirror_used_MB
     89                 179
ASMCMD> lsdg
State    Type    Rebal  Unbal  Sector  Block       AU  Total_MB  Free_MB  Req_mir_free_MB  Usable_file_MB  Offline_disks  Name
MOUNTED  NORMAL  N      N         512   4096  1048576       701      358              101             128              0  DATA/

        ④ 查找文件

ASMCMD> find +DATA redo*
+DATA/ORCL/ONLINELOG/redo_log_group_3.log

        ⑤ 显示ASM和数据库实例的连接情况

ASMCMD> lsct

        ⑥ 删除文件

ASMCMD> rm  +DATA/ORCL/ONLINELOG/redo_log_group_3.log