如何在Linux中将用户关系更改为分组

Question

我有几个用户说：A，B，C，D等2组：主，从。 每个用户只属于这些组中的一个（排他性）。 如何以编程方式更改此所有权？

例如：用户A属于“master”组 如何从“master”组中删除它并将其添加到“slave”组？

Answer 1

来自usermod的手册页：

-G, --groups group,...
With this option a list of supplementary groups can be specified, which the user should become a member of. Each group is separated from the next one only by a comma, without whitespace. The user is removed from all other groups not specified.


-R, --remove-from-group group,...
With this option a list of groups can be specified, from which the user should be removed. Each group is separated from the next one only by a comma, without whitespace.

如果由于某种原因未在您的系统上预安装，则该命令来自pwdutils包。