7
I'm building a Docker container, and I need to add my user to a group. usermod is not available in Alpine Linux by default. Apparently, you can add shadow from apk to install usermod, but I would prefer to not install additional packages.
Is there an alternative way to add a user to a group, or an equivalent tool to usermod available in Alpine?
Zak
Posted 2019-01-17T17:13:03.273
Reputation: 171
8
You should be able to use the built-in addgroup command to add the user to a given group:
$ addgroup --help
BusyBox v1.29.3 (2019-01-24 07:45:07 UTC) multi-call binary.
Usage: addgroup [-g GID] [-S] [USER] GROUP
Add a group or add a user to a group
-g GID Group id
-S Create a system group
So running addgroup ${USER} ${GROUP} should update /etc/groups without needing to edit the file directly.
tzrlk
Posted 2019-01-17T17:13:03.273
Reputation: 181
Have you seen this? Basically adding environment variables for UID and GID when initializing. – JakeGould – 2019-01-17T17:20:32.113
2Why not simply modify the /etc/group file directly? – davidgo – 2019-01-17T18:12:09.373
@davidgo Some people don’t know you can just edit it like that but it’s a good solution. Would need to be scriptable via
sedor something like that. – JakeGould – 2019-01-17T21:09:56.810