Show ASM status
srvctl status asm
Show more detailed ASM configuration
srvctl config asm
sqlplus login to ASM
sqlplus / as sysasm
Show which ASM clients are connected to this ASM instance
select instance_name, db_name, status from v $asm_client;
The only parameter that must be set for an ASM instance is INSTANCE_TYPE=ASM. All others have defaults that are generally acceptable for a basic instance.
Command to show disk groups
asmcmd lodge