1. 首先先确定自己是否有/etc/sudoers里面
2. 绑定主机名

[root@bogon etc]# hostname
bogon
[root@bogon etc]# vim /etc/hosts

增加一行,把自己的主机增加进去
如下面所示

# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1       bogon localhost.localdomain localhost
::1             bogon localhost6.localdomain6 localhost6

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