ubuntu server 18.04的安裝 以及配置網絡還有ssh服務
服務器是 dell T420
安裝過程中規中矩，其中最關鍵的是分區部分，由於是服務器，如果磁盤比較大的話，一定要用 uefi + gpt
其次最好是多分一些區，將home 以及一些目錄獨立出來 實現程序與數據分離
安裝完以后需要配置靜態的ip
首先一、查看網絡配置狀態
ifconfig -a
二、配置dhcp客戶端
修改:/etc/network/interface文件
auto lo
iface lo inet loop back
三、配置靜態ip
sudo vim /etc/network/interfaces
# 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
重啟一下網絡即可
sudo /etc/init.d/networking restart
也可以重啟網卡：
sudo ifdown eth0
sudo ifup eht0
如果從遠端登錄的，執行ifdown eth0則會中斷連接的。
ping一下網關，通的話說明沒有問題
之后便需要安裝openssh
首先是apt-get update
不行的話需要更換源
vi /etc/apt/source.list
清華大學源（教育網）
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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
阿里雲源
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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
-
deb http: //mirrors.aliyun.com/ubuntu/ xenial-updates main restricted
-
deb-src http: //mirrors.aliyun.com/ubuntu/ xenial-updates main restricted multiverse universe #Added by software-properties
-
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
-
deb http: //mirrors.aliyun.com/ubuntu/ xenial-updates multiverse
-
deb http: //mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse
-
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
之后我們就可以安裝了
apt-get install openssh-server
打開"終端窗口"，輸入"sudo ps -e |grep ssh"-->回車-->有sshd,說明ssh服務已經啟動，如果沒有啟動，輸入"sudo service ssh start"-->回車-->ssh服務就會啟動。
打開"終端窗口"，輸入"sudo gedit /etc/ssh/sshd_config"-->回車-->把配置文件中的"PermitRootLogin without-password"加一個"#"號,把它注釋掉-->再增加一句"PermitRootLogin yes"-->保存，修改成功。