After upgrading to 2048 bit key and SHA256 signature certificates, the certificates of non-root users become obsolete and must be deleted in order to allow non-root users to log in. Perform the following steps to delete the non-root certificates for each non-root user:

1. Delete .VRTSat from the home directory of the users.

   # rm -rf /user_home_directory/.VRTSat

2. If the non-root user was not a cluster user prior to upgrade, add user to Cluster with appropriate Privilege.

   # hauser -add <user name> -priv <Privilege>

3. Log in with non-root user and create new certificates.

   # /opt/VRTS/bin/halogin <non_root_user> <password>