Добавить пользователя в группу
usermod -a -G examplegroup exampleusername
Black Beaver
usermod -a -G examplegroup exampleusernamesudo usermod -aG <groups> <username>sudo usermod -aG groupName userName
# restart or just run
newgrp groupNameUser: the owner of the file (person who created the file).
Group:the group can contain multiple users. Therefore, all users in that group will have the same permissions. It makes things easier than assign permission for every user you want.sudo dseditgroup -o edit -t user -a <user> <group> # OSX useradd -mg [groups] [username]