useradd -a
时间: 2023-11-04 17:23:14 浏览: 46
useradd命令用于创建新用户,并且可以指定其所属的主要组。而-a参数是用来指定用户所属的附加组。在给定的引用中,并没有提到useradd命令有-a参数的使用。所以我无法提供关于useradd -a参数的具体解释和用法。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
相关问题
linux useradd -e
The "useradd -e" command in Linux is used to specify the expiration date for a user account. The "-e" option is followed by the expiration date in YYYY-MM-DD format. After this date, the user account will be disabled and the user will no longer be able to login.
useradd -M -s /sbin/nologin prometheus -g prometheus
This command creates a new user called "prometheus" with the following options:
- "-M" creates a user without a home directory
- "-s /sbin/nologin" sets the login shell to "/sbin/nologin", which prevents the user from logging in
- "-g prometheus" sets the primary group of the user to "prometheus"
Overall, this command is useful for creating a user that is solely dedicated to running the Prometheus monitoring system, without allowing any login access.
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