Ubuntu latest (Ubuntu 24.04 LTS) has issue with GID 1000 that it is already created.

[xcellent101]

> docker run -p 4200:4200 -e SIAB_PASSWORD=xyz678abc -e SIAB_SUDO=true sspreitzer/shellinabox:latest
Preparing container ..
groupadd: GID '1000' already exists

Need to set the default to be group 1001 in the entry file or some other group number for this to work.

the below argument works

>docker run -p 4200:4200 -e SIAB_PASSWORD=abc123 -e SIAB_SUDO=true -e SIAB_USERID=1001 -e SIAB_GROUPID=1001 sspreitzer/shellinabox:latest
Preparing container ..
Starting container ..