Failed to launch! 255 - upon change cryosparc_master_hostname and then update

[cryofun]

I found Dan’s old post about the /etc/hosts file and note mine does not contain the new “hostname” after 127.0.0.1. Should I add this?

It shows:
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4

from:

CentOS SELinux configuration for cryoSPARC

The localhost alias is defined in the first line of /etc/hosts. Perhaps some people have incorrect hosts files. head -1 /etc/hosts 127.0.0.1 hostname localhost localhost.localdomain localhost4 localhost4.localdomain4 By the way, to access cryosparc locally or over a SSH tunnel on CentOS, no additional configuration is required. To access remotely, you need only open that one port (38000 by default). I always leave SELinux set to enforcing. Any actual SELinux policy violations will be reported…