oracle 10R2推出了asmcmd这个工具，可以用来管理asm存储上的文件。
1.使用asmcmd命令必须先启动asm实例，不然会有以下报错：rac2-> asmcmd -p
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
Linux Error: 2: No such file or directory (DBD ERROR: OCISessionBegin)2.使用asmcmd必须先指定ORACLE_HOME和ORACLE_SID，注意此处ORACLE_SID是asm的sid，不然会报错：rac2-> asmcmd -p
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
Linux Error: 2: No such file or directory (DBD ERROR: OCISessionBegin)3.asmcmd命令带p参数和不带p参数的作用：
带p，使用asmcmd将显示当前路径：rac2-> asmcmd -p
ASMCMD [+] > ls
DG1/
RECOVERDEST/
ASMCMD [+] > cd DG1
ASMCMD [+DG1] > ls
DEVDB/
ASMCMD [+DG1] > cd DEVDB
ASMCMD [+DG1/DEVDB] >不带p，不显示当前路径：rac2-> asmcmd
ASMCMD> ls
DG1/
RECOVERDEST/
ASMCMD> cd DG1
ASMCMD> ls
DEVDB/
ASMCMD> cd DEVDB
ASMCMD>4.其他相关参数，可使用help查看ASMCMD [+] > help
asmcmd [-p] [command]
The environment variables ORACLE_HOME and ORACLE_SID determine the
instance to which the program connects, and ASMCMD establishes a
bequeath connection to it, in the same manner as a SQLPLUS / AS
SYSDBA. The user must be a member of the SYSDBA group.
Specifying the -p option allows the current directory to be displayed
in the command prompt, like so:
ASMCMD [+DATAFILE/ORCL/CONTROLFILE] >
[command] specifies one of the following commands, along with its
parameters.
Type "help [command]" to get help on a specific ASMCMD command.
commands:
--------
cd
find
help
ls
lsct
lsdg
mkalias
mkdir
pwd
rm
rmalias