ubuntu server 18.04的安装 以及配置网络还有ssh服务
服务器是 dell T420
安装过程中规中矩，其中最关键的是分区部分，由于是服务器，如果磁盘比较大的话，一定要用 uefi + gpt
其次最好是多分一些区，将home 以及一些目录独立出来 实现程序与数据分离
安装完以后需要配置静态的ip
首先一、查看网络配置状态
ifconfig -a
二、配置dhcp客户端
修改:/etc/network/interface文件
auto lo
iface lo inet loop back
三、配置静态ip
sudo vim /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
source /etc/network/interfaces.d/*
# The loopback network interface
auto lo
iface lo inet loopback
auto eno1
iface eno1 inet static
address 10.131.252.160
netmask 255.255.254.0
broadcast 10.131.253.255
gateway 10.131.252.1
dns-nameservers 202.120.224.26
auto eno1
iface eno1 inet6 auto
四、配置生效
重启一下网络即可
sudo /etc/init.d/networking restart
也可以重启网卡：
sudo ifdown eth0
sudo ifup eht0
如果从远端登录的，执行ifdown eth0则会中断连接的。
ping一下网关，通的话说明没有问题
之后便需要安装openssh
首先是apt-get update
不行的话需要更换源
vi /etc/apt/source.list
清华大学源（教育网）
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# deb cdrom:[Ubuntu 16.04 LTS _Xenial Xerus_ - Release amd64 (20160420.1)]/ xenial main restricted
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deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial main restricted
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deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates main restricted
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deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial universe
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deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates universe
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deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial multiverse
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deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates multiverse
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deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-backports main restricted universe multiverse
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deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security main restricted
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deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security universe
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deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security multiverse
阿里云源
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# deb cdrom:[Ubuntu 16.04 LTS _Xenial Xerus_ - Release amd64 (20160420.1)]/ xenial main restricted
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deb-src http://archive.ubuntu.com/ubuntu xenial main restricted #Added by software-properties
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deb http://mirrors.aliyun.com/ubuntu/ xenial main restricted
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deb-src http://mirrors.aliyun.com/ubuntu/ xenial main restricted multiverse universe #Added by software-properties
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deb http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted
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deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted multiverse universe #Added by software-properties
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deb http://mirrors.aliyun.com/ubuntu/ xenial universe
-
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates universe
-
deb http://mirrors.aliyun.com/ubuntu/ xenial multiverse
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deb http://mirrors.aliyun.com/ubuntu/ xenial-updates multiverse
-
deb http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse
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deb-src http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse #Added by software-properties
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deb http://archive.canonical.com/ubuntu xenial partner
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deb-src http://archive.canonical.com/ubuntu xenial partner
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deb http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted
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deb-src http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted multiverse universe #Added by software-properties
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deb http://mirrors.aliyun.com/ubuntu/ xenial-security universe
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deb http://mirrors.aliyun.com/ubuntu/ xenial-security multiverse
之后我们就可以安装了 apt-get install openssh-server
打开"终端窗口"，输入"sudo ps -e |grep ssh"-->回车-->有sshd,说明ssh服务已经启动，如果没有启动，输入"sudo service ssh start"-->回车-->ssh服务就会启动。
打开"终端窗口"，输入"sudo gedit /etc/ssh/sshd_config"-->回车-->把配置文件中的"PermitRootLogin without-password"加一个"#"号,把它注释掉-->再增加一句"PermitRootLogin yes"-->保存，修改成功。