vigr命令可以修改group、gshadow文件，使用vigr命令可以编辑/etc/group文件。当寻找一个编辑器时将首先尝试环境变量$VISUAL，然后是环境变量$EDITOR，最后默认是vi编辑器。
语法格式：vigr [参数]
常用参数：
| -g | 修改组信息 |
| -p | 修改密码信息 |
| -R | 在CHROOT_DIR目录中应用更改并使用CHROOT_DIR目录中的配置文件 |
| -s | 编辑shadow 或 gshadow 信息 |
参考实例
修改组信息：
[root@linuxcool ~]# vigr -g
修改密码信息：
[root@linuxcool ~]# vigr -p
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