ASM Command-Line Interface (ASMCMD) utility

Introduced in Oracle 10g release 2, the ASM Command-Line Interface (ASMCMD) utility provides an easy way to manipulate files within Automatic Storage Management (ASM) diskgroups. Its major functionality is to present an ASM file system in a user-friendly directory-tree structure. ASMCMD provides short commands for accessing the files and directories within ASM diskgroups.
The interface provides both interactive and noninteractive modes. The interactive mode enters a shell-like environment where the user is prompted to issue the commands. The noninteractive mode executes a single command and exits the utility. The latter is made available for scripting and batch-processing purposes.
You can invoke the ASMCMD tool with a -p parameter to always display the present directory inside the prompt itself.
Here is a brief description of ASMCMD commands:

pwd	displays the absolute path of the current directory.
cd	changes the current directory to the specify directory.
find	finds under a specified directory all paths that match a given pattern.
ls	lists aliases or its contents alphabetically by name if the alias is a directory.
mkdir	creates directories.
rm	removes the specified file as well as its system alias. If it is an empty directory, then rm removes it.
mkalias	creates the specified user alias for the specified system alias.
rmalias	deletes the specified user aliases, while preserving the files and their system aliases.
du	displays the total space used for files located recursively under the specified directory.
lsdg	lists all diskgroups and their attributes.
lsct	lists all clients and their attributes.
help	displays list of commands