ASMCMD-08102: no connection to ASM; command requires ASM to run

How to resolve the error  "ASMCMD-08102: no connection to ASM; command requires ASM to run" ?

[oracle@host1.xxx.com]$ asmcmd
Connected to an idle instance.
ASMCMD> ls
ASMCMD-08102: no connection to ASM; command requires ASM to run

Cause: This is a simple error occurred because the ASM instance environment variables are not set properly

Solution:
We need to Set ASM instance environment variables
[oracle@host1.xxx.com ]$ export ORACLE_HOME=/u01/app/oracle/product/11.2.0/grid  
                                                                                   (or)
                                                setenv ORACLE_HOME  /u01/app/oracle/product/11.2.0/grid
[oracle@host1.xxx.com ]$ export PATH=/u01/app/oracle/product/11.2.0/grid/bin
                                                                                   (or )
                                                setenv PATH /u01/app/oracle/product/11.2.0/grid/bin
[oracle@host1.xxx.com ]$ export ORACLE_SID=+ASM1
                                                                                    (or)
                                                 setenv ORACLE_SID  +ASM1

Now the variables are set properly you can check the list
[oracle@host1.xxx.com ]$ asmcmd

ASMCMD> ls
DATA/
FRA/
OCR_VOTE/

/u01/app/oracle/product/11.2.0/db_1/bin/clsecho: No such file or directory

Error: /u01/app/oracle/product/11.2.0/db_1/bin/clsecho: No such file or directory

Reason: 

This error occurs when we perform commands on ASM prompt. This is not a major issue to worry. This error causes because of improper set up of ASM environment variables.

    [oracle@node1-rac1 ~]$ asmcmd

    Connected to an idle instance.

    sh: /u01/app/oracle/product/11.2.0/db_1/bin/clsecho: No such file or directory

    ASMCMD> ls

    Can't exec "/u01/app/oracle/product/11.2.0/db_1/bin/clsecho": No such file or directory at /u01/app/oracle/product/11.2.0/db_1/lib/asmcmdshare.pm line 493, <STDIN> line 1.

    Use of uninitialized value $buf in string ne at /u01/app/oracle/product/11.2.0/db_1/lib/asmcmdshare.pm line 497, <STDIN> line 1.

    ASMCMD>

To set the proper environment variables follow the below steps:

    [oracle@rac1 ~]$ cat /etc/oratab | grep ASM

    # a database or ASM Configuration Assistant while creating ASM instance.

    +ASM1:/u01/app/11.2.0/grid:N          # line added by Agent

Action: 

set the env variables as below

    [oracle@rac1 ~]$ . oraenv

    ORACLE_SID = [RAC1]?  +ASM1   ----> enter as +ASM1 here if it is your node-1, +ASM2 if it is node-2 instance

    The Oracle base remains unchanged with value /u01/app/oracle

    [oracle@rac1 ~]$ asmcmd

    ASMCMD>

    ASMCMD>

    ASMCMD> ls

    DATA/

    ASMCMD>

                Now the issue is solved. We can list and check files using basic unix commands like ls,cat spfile.ora.

Note: Don’t forget to perform this on all nodes as well.