How can I modify the settings of DRBL SSI mode? e.g. the bash prompt?
DRBL SSI mode uses template tarballs (/tftpboot/node_root/drbl_ssi/template*.tgz) for clients, so if you want to modify the setting, you can make it:
For example, take client 192.168.100.1 as the template, you can modify /tftpboot/nodes/192.168.100.1/etc/bash.bashrc
Once you have finished that, run:
drbl-gen-ssi-files -t 192.168.100.1
Here we force to use 192.168.100.1 as the template. //NOTE// if you run drbl-gen-ssi-files without "-t" option, it will use the first one available in /tftpboot/nodes/, which might be different from the one you have modified.