The symbolic links for the default ca are deleted. 
The env vars are set to the follwing:

export GRIDMAP=$GLOBUS_LOCATION/etc/grid-security/grid-mapfile
export X509_CERT_DIR=$GLOBUS_LOCATION/etc/grid-security/certificates
export GRID_SECURITY_DIR=$GLOBUS_LOCATION/etc/grid-security


The available CA configurations installed on this host are:

Directory: /opt/grid4/etc/grid-security/certificates

1) d8cd21cd -  /O=Grid/OU=GlobusTest/OU=simpleCA/CN=Globus Simple CA

/bin/ls: :  No such file or directory

Enter the index number of the CA to set as the default:1

setting the default CA to: /O=Grid/OU=GlobusTest/OU=simpleCA/CN=Globus Simple CA

linking /opt/grid4/etc/grid-security/certificates//grid-security.conf.d8cd21cd to
        /opt/grid4/etc/grid-security/grid-security.conf

linking /opt/grid4/etc/grid-security/certificates//globus-host-ssl.conf.d8cd21cd to
        /opt/grid4/etc/grid-security/globus-host-ssl.conf

linking /opt/grid4/etc/grid-security/certificates//globus-user-ssl.conf.d8cd21cd to
        /opt/grid4/etc/grid-security/globus-user-ssl.conf

removing link /opt/grid4/etc/grid-security/directions


...done.

The unexpected messages are:

/bin/ls: :  No such file or directory

and 

removing link /opt/grid4/etc/grid-security/directions

What link is about to be removed ???