系统管理工具与网络技术详解
1. 用户组信息查看与日志记录
1.1 用户组信息查看
可以使用show_group_members脚本查看用户所在的组信息，示例如下：
show_group_members `id -G $USERNAME`运行groups.sh脚本后，会输出用户所在的组信息，包括主组和附加组，以及各用户组的主要成员和次要成员。例如：
$ ./groups.sh User steve is in these groups: sysadm support User steve : Primary group is sysadm Additional groups: staff support Primary members of the group sysadm: steve:Steve Parker bethany:Bethany Parker Secondary members of the group sysadm: www:Apache Web Server dns:Bind Name Server Primary members of the group staff: hr:Human Resources Secondary members of the group staff: steve:Steve Parker bethany:Bethany Parker emily:Emily Parker jackie:
