Hi @alburse,
Regarding the hostname issue, if you delete the CRYOSPARC_MASTER_HOSTNAME line in the cryosparc2_master/config.sh file, the hostname will be set whenever cryoSPARC is started (cryosparcm start). This is given that the following command: echo -e "$(hostname -f)" | tr -d '[:space:]' returns the correct hostname on every compute node.