问个关于SUN的GROUP的问题

unixabcd

我在系统里面USERADD了好几个帐号，怎么GROUP这文件一点不变了，没有任何象别的UNIX系统那样，帐号加了，在GROUP里面有该帐号组的信息啊？？


然后我想自己加组的，可是没有什么ADDGROUP，GROUPADD等命令，真郁闷，这个组怎么加呢？

guchengman

PATH设置问题.

sunsun2003

try to use SMC

laoxia

>; 然后我想自己加组的，可是没有什么ADDGROUP，GROUPADD等命令，真郁闷，这个组怎么加呢？

groupadd

>; 我在系统里面USERADD了好几个帐号，怎么GROUP这文件一点不变了，没有任何象别的UNIX系统那样，帐号加了，在GROUP里面有该帐号组的信息啊？？

groups  username

laoxia

ZT

Guidelines for Managing Groups
A group is a collection of users who can share files and other system resources. For example, the set of users working on the same project could be formed into a group. A group is traditionally known as a UNIX group.

Each group must have a name, a group identification (GID) number, and a list of user names that belong to the group. A GID identifies the group internally to the system. The two types of groups that a user can belong to are:

Primary group – Specifies a group that the operating system assigns to files created by the user. Each user must belong to a primary group.

Secondary groups – Specifies one or more groups to which a user also belongs. Users can belong to up to 15 secondary groups.

Sometimes a user's secondary group is not important. For example, ownership of files reflect the primary group, not any secondary groups. Other applications, however, might rely on a user's secondary memberships. For example, a user has to be a member of the sysadmin group (group 14) to use the Admintool software, but it doesn't matter if group 14 is his or her current primary group.

The groups command lists the groups that a user belongs to. A user can have only one primary group at a time. However, a user can temporarily change the user's primary group (with the newgrp command) to any other group in which the user is a member.

When adding a user account, you must assign a primary group for a user or accept the default group, staff (group 10). The primary group should already exist (if it doesn't exist, specify the group by a GID number). User names are not added to primary groups. If they were, the list might become too long. Before you can assign users to a new secondary group, you must create the group and assign it a GID number.

Groups can be local to a system or can be managed through a name service. To simplify group administration, you should use a name service like NIS, which enables you to centrally manage group memberships.