Ubuntu的安装配置和使用

前言

untu(乌班图)是一个以桌面应用为主的Linux操作系统，其名称来自非洲南部祖鲁语或豪萨语的"ubuntu"一词，意思是"人性"、"我的存在是因为大家的存在"，是非洲传统的一种价值观，类似华人社会的"仁爱"思想。Ubuntu基于Debian发行版和GNOME桌面环境，而从11.04版起，Ubuntu发行版放弃了Gnome桌面环境，改为Unity，与Debian的不同在于它每6个月会发布一个新版本。Ubuntu的目标在于为一般用户提供一个最新的、同时又相当稳定的主要由自由软件构建而成的操作系统。Ubuntu具有庞大的社区力量，用户可以方便地从社区获得帮助。2013年1月3日，Ubuntu正式发布面向智能手机的移动操作系统。

1 系统安装操作步骤

OS Version:1804镜像下载：http://cdimage.ubuntu.com/releases/

1.1 选择安装语言：

1.2 安装界面选择第一项进行系统安装

1.3 选择安装过程中使用的语言，也是系统安装完后使用的默认语言

1.4 选择地区，这里先选择最后一项other，然后回车再选择Asia，最后选择China

1.5 选择语言环境

1.6 键盘布局检查，选择NO

1.7 选择美式键盘

1.8 确认使用美式键盘

1.9 配置主机名

1.10 创建一个普通用户和为其设置密码

1.11 确认时区

1.12 选择磁盘分区的方法，这里选手动分区

1.13 选择磁盘

1.14 确认对磁盘分区

1.15 对磁盘分区

1.16 创建新分区

1.17 指定分区大小，这里将磁盘的全部大小划分给该分区

1.18 选择分区类型，这里选主分区

1.19 分区完成

1.20 完成分区并写入数据

1.21 确认写入磁盘

1.22 是否使用代理，这里不填

1.23 是否自动更新，这里选择默认，不自动更新

1.24 选择安装组件，选择对应需要安装的组件，然后按空格键，这里选择OpenSSH Server

1.25 将GRUB引导加载程序安装到主引导记录

1.26 完成安装，确认重启服务器

1.27 登录系统

2 系统基础配置

官方文档：https://help.ubuntu.com/

2.1 更改主机名

# cat /etc/hostname hechunping

2.2 更改网卡名称为eth*

# sed -i '/GRUB_CMDLINE_LINUX=/s/"$/net.ifnames=0 biosdevname=0"/' /etc/default/grub# update-grubSourcing file `/etc/default/grub'Generating grub configuration file ...Found linux image: /boot/vmlinuz-4.15.0-55-genericFound initrd image: /boot/initrd.img-4.15.0-55-genericdone# reboot# sed -i 's/ens33/eth0/' /etc/netplan/01-netcfg.yaml

2.3 配置root远程登录

# 默认情况下，ubuntu不允许root⽤⼾远程ssh，如果有实际场景需要允许root⽤⼾远程ssh，则需要设置root密码，并且编辑/etc/ssh/sshd_config⽂件修改如下：~$ sudo vim /etc/ssh/sshd_config32 #PermitRootLogin prohibit-password #默认为禁⽌登录33 PermitRootLogin yes #改为允许登录57 #PasswordAuthentication yes58 PasswordAuthentication yes #打开密码认证，其实默认就是允许通过密码认证登录~$ sudo su - root #切换到root⽤⼾环境~# passwd #设置密码Enter new UNIX password:Retype new UNIX password:passwd: password updated successfully~# systemctl restart sshd #重启ssh服务并测试root⽤⼾远程ssh连接

2.4 网络配置

官方文档：https://netplan.io/Ubuntu 从 17.10 开始，已放弃在 /etc/network/interfaces ⾥固定IP的配置，⽽是改成 netplan ⽅式，配置⽂件是：/etc/netplan/01-netcfg.yaml# ubuntu 17.04及之前的静态IP配置⽅式：~# cat /etc/network/interfacesroot@hechunping:~# cat /etc/network/interfaces# interfaces(5) file used by ifup(8) and ifdown(8)auto loiface lo inet loopbackauto eth0 #⽹卡⾃启动，写⾃⼰要配置IP的实际⽹卡名称iface eth0 inet static #配置静态IP，写⾃⼰要配置IP的实际⽹卡名称address 172.18.3.12 #IP地址netmask 255.255.0.0 #掩码gateway 172.18.0.1 #⽹关dns-nameservers 223.6.6.6 #DNSdns-nameservers 223.5.5.5#重启⽹络服务~# /etc/init.d/networking restart~# systemctl restart networking.service

2.4.1 单网卡静态IP地址

root@hechunping:~# cat /etc/netplan/01-netcfg.yaml # This file describes the network interfaces available on your system# For more information, see netplan(5).network:  version: 2  renderer: networkd  ethernets:    eth0:      dhcp4: no      addresses: [192.168.7.132/24]      gateway4: 192.168.7.2      nameservers:        addresses: [223.6.6.6]root@hechunping:~# netplan apply

2.4.2 配置多网卡静态IP

# cat /etc/netplan/01-netcfg.yaml # This file describes the network interfaces available on your system# For more information, see netplan(5).network:  version: 2  renderer: networkd  ethernets:    eth0:      dhcp4: no      addresses: [172.20.7.34/16]      gateway4: 172.20.0.1      nameservers:        addresses: [223.6.6.6]    eth2:      dhcp4: no      addresses: [192.168.7.34/24]      routes:        - to: 172.20.0.0/16          via: 192.168.7.2# netplan apply

2.4.3 单网卡桥接

# cat /etc/netplan/01-netcfg.yaml # This file describes the network interfaces available on your system# For more information, see netplan(5).network:  version: 2  renderer: networkd  ethernets:    eth0:      dhcp4: no  bridges:    br0:      dhcp4: no      addresses: [172.20.7.34/16]      gateway4: 172.20.0.1      nameservers:        addresses: [223.6.6.6]      interfaces:        - eth0# netplan apply

2.4.4 多网卡桥接

将br0和br1分别桥接到eth0和eth2。# cat /etc/netplan/01-netcfg.yaml # This file describes the network interfaces available on your system# For more information, see netplan(5).network:  version: 2  renderer: networkd  ethernets:    eth0:      dhcp4: no    eth2:      dhcp4: no  bridges:    br0:      dhcp4: no      addresses: [172.20.7.34/16]      gateway4: 172.20.0.1      nameservers:        addresses: [223.6.6.6]      interfaces:        - eth0    br1:      dhcp4: no      addresses: [192.168.7.34/24]      routes:        - to: 172.20.0.0/16          via: 192.168.7.2      interfaces:        - eth2root@hechunping:~# netplan apply

2.4.5 双网卡绑定

需要提前安装好bridge命令，两块网卡使用同一种网络模式# cat /etc/netplan/01-netcfg.yaml # This file describes the network interfaces available on your system# For more information, see netplan(5).network:  version: 2  renderer: networkd  ethernets:    eth0:      dhcp4: no    eth2:      dhcp4: no  bonds:    bond0:      interfaces:        - eth0        - eth2      addresses: [172.20.7.34/16]      gateway4: 172.20.0.1      nameservers:        addresses: [223.6.6.6,223.5.5.5]      parameters:        mode: active-backup        mii-monitor-interval: 100# poweroff# netplan apply

2.4.6 双网卡绑定+桥接

⽹卡绑定⽤于提供⽹卡接⼝冗余以及⾼可⽤和端⼝聚合功能，桥接⽹卡再给需要桥接设备的服务使⽤。# cat /etc/netplan/01-netcfg.yaml # This file describes the network interfaces available on your system# For more information, see netplan(5).network:  version: 2  renderer: networkd  ethernets:    eth0:      dhcp4: no    eth2:      dhcp4: no  bonds:    bond0:      interfaces:        - eth0        - eth2      parameters:        mode: active-backup        mii-monitor-interval: 100  bridges:    br0:      dhcp4: no      addresses: [172.20.7.34/16]      gateway4: 172.20.0.1      nameservers:        addresses: [223.6.6.6,223.5.5.5]      interfaces:        - bond0# netplan apply

2.4.7 内外多网卡绑定

多⽹络情况下实现⽹卡绑定。这里使用桥接(eth0,eth2)和NAT(eth3,eth4)两种网络模式# cat /etc/netplan/01-netcfg.yaml # This file describes the network interfaces available on your system# For more information, see netplan(5).network:  version: 2  renderer: networkd  ethernets:    eth0:      dhcp4: no    eth2:      dhcp4: no    eth3:      dhcp4: no    eth4:      dhcp4: no  bonds:    bond0:      interfaces:        - eth0        - eth2      addresses: [172.20.7.34/16]      gateway4: 172.20.0.1      nameservers:        addresses: [223.6.6.6,223.5.5.5]      parameters:        mode: active-backup        mii-monitor-interval: 100    bond1:      interfaces:        - eth3        - eth4      addresses: [192.168.7.34/24]      parameters:        mode: active-backup        mii-monitor-interval: 100      routes:        - to: 172.20.0.0/16          via: 192.168.7.2# netplan apply

2.4.8 内外多网卡绑定+桥接

# cat /etc/netplan/01-netcfg.yaml # This file describes the network interfaces available on your system# For more information, see netplan(5).network:  version: 2  renderer: networkd  ethernets:    eth0:      dhcp4: no    eth2:      dhcp4: no    eth3:      dhcp4: no    eth4:      dhcp4: no  bonds:    bond0:      interfaces:        - eth0        - eth2      parameters:        mode: active-backup        mii-monitor-interval: 100    bond1:      interfaces:        - eth3        - eth4      parameters:        mode: active-backup        mii-monitor-interval: 100  bridges:    br0:      dhcp4: no      addresses: [172.20.7.34/16]      gateway4: 172.20.0.1      nameservers:        addresses: [223.6.6.6,223.5.5.5]      interfaces:        - bond0    br1:      dhcp4: no      addresses: [192.168.7.34/24]      routes:        - to: 172.20.0.0/16          via: 192.168.7.2      interfaces:        - bond1# netplan apply

3 软件包管理

3.1 修改软件仓库地址

阿⾥云仓库地址：https://developer.aliyun.com/mirror中科⼤：http://mirrors.ustc.edu.cn/help/ubuntu.html清华⼤学：https://mirror.tuna.tsinghua.edu.cn/help/ubuntu/华为：https://mirrors.huaweicloud.com/###### 清华源配置 ######Ubuntu 的软件源配置文件是 /etc/apt/sources.list。将系统自带的该文件做个备份，将该文件替换为下面内容，即可使用 TUNA 的软件源镜像。# cd /etc/apt/# cp -p sources.list sources.list.bak# vim sources.list# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiversedeb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiversedeb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiversedeb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse# 预发布软件源，不建议启用# deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse# apt update #更新本地软件包列表索引，修改了apt仓库后必须执⾏###### 阿里源配置 ####### sed -i 's/cn.archive.ubuntu/mirrors.aliyun/' /etc/apt/sources.list# apt update #更新本地软件包列表索引，修改了apt仓库后必须执⾏

3.2 apt工具使用

apt list #apt列出仓库软件包，等于yum listapt search NAME #搜索安装包apt show apache2 #查看某个安装包的详细信息apt install apache2 #在线安装软件包apt remove apache2 #卸载单个软件包但是保留配置⽂件apt autoremove apache2 #删除安装包并解决依赖关系apt update #更新本地软件包列表索引，修改了apt仓库后必须执⾏apt purge apache2 #卸载单个软件包删除配置⽂件apt upgrade #升级所有已安装且可升级到新版本的软件包apt full-upgrade #升级整个系统，必要时可以移除旧软件包。apt edit-sources #编辑source源⽂件apt-cache madison nginx #查看仓库中软件包有哪些版本可以安装apt install nginx=1.14.0-0ubuntu1.6 #安装软件包的时候指定安装具体的版本

3.3 dpkg安装包管理

rpm：RPM(Red Hat Package Manager)，是基于Red hat的Linux Distribution的包管理系统，同时也指rpm包本⾝，RPM⽤于rpm包的管理（诸如安装、卸载、升级等）"dpkg "是"Debian Packager "的简写,为 "Debian"专⻔开发的套件管理系统，⽅便软件的安装、更新及移除。所有源⾃"Debian"的"Linux "发⾏版都使⽤ "dpkg"，例如 "Ubuntu"、"Knoppix "等。dpkg -i gitlab-ce_11.9.8-ce.0_amd64.deb #安装某个软件包dpkg -r gitlab-ce #删除某个软件包保留配置⽂件dpkg -r -P gitlab-ce #删除某个软件包不保留配置⽂件dpkg -I gitlab-ce_11.9.8-ce.0_amd64.deb #查看软件包信息dpkg -c gitlab-ce_11.9.8-ce.0_amd64.deb #查看软件包内的⽂件及⽬录内容dpkg -l #列出本机已经安装的所有软件

3.4 设置oracle JDK环境

# pwd/usr/local/src解压⼆进制⽂件并设置软连接：# tar xf jdk-8u212-linux-x64.tar.gz# ln -sv /usr/local/src/jdk1.8.0_212 /usr/local/jdk配置环境变量：# vim /etc/profileexport JAVA_HOME=/usr/local/jdkexport PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATHexport CLASSPATH=.$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib:$JAVA_HOME/lib/tools.jar重新导⼊环境变量并验证：# source /etc/profile# java -versionjava version "1.8.0_212"Java(TM) SE Runtime Environment (build 1.8.0_212-b10)Java HotSpot(TM) 64-Bit Server VM (build 25.212-b10, mixed mode)

3.5 安装OpenJDK

# apt install openjdk-8-jdk

3.6 安装常⽤系统命令

# apt purge ufw lxd lxd-client lxcfs lxc-common# apt install iproute2 ntpdate tcpdump telnet traceroute nfs-kernel-server nfs-common lrzsz tree openssl libssl-dev libpcre3 libpcre3-dev zlib1g-dev ntpdate tcpdump telnet traceroute gcc openssh-server lrzsz tree openssl libssl-dev libpcre3 libpcre3-dev zlib1g-dev ntpdate tcpdump telnet traceroute iotop unzip zip

3.7 系统资源限制优化

#cat /etc/security/limits.conf#root账⼾的资源软限制和硬限制root soft core unlimitedroot hard core unlimitedroot soft nproc 1000000root hard nproc 1000000root soft nofile 1000000root hard nofile 1000000root soft memlock 32000root hard memlock 32000root soft msgqueue 8192000root hard msgqueue 8192000#其他账⼾的资源软限制和硬限制* soft core unlimited* hard core unlimited* soft nproc 1000000* hard nproc 1000000* soft nofile 1000000* hard nofile 1000000* soft memlock 32000* hard memlock 32000* soft msgqueue 8192000* hard msgqueue 8192000

3.8e 内核参数优化

# Controls source route verificationnet.ipv4.conf.default.rp_filter = 1net.ipv4.ip_nonlocal_bind = 1net.ipv4.ip_forward = 1# Do not accept source routingnet.ipv4.conf.default.accept_source_route = 0# Controls the System Request debugging functionality of the kernelkernel.sysrq = 0# Controls whether core dumps will append the PID to the core filename.# Useful for debugging multi-threaded applications.kernel.core_uses_pid = 1# Controls the use of TCP syncookiesnet.ipv4.tcp_syncookies = 1# Disable netfilter on bridges.net.bridge.bridge-nf-call-ip6tables = 0net.bridge.bridge-nf-call-iptables = 0net.bridge.bridge-nf-call-arptables = 0# Controls the default maxmimum size of a mesage queuekernel.msgmnb = 65536# # Controls the maximum size of a message, in byteskernel.msgmax = 65536# Controls the maximum shared segment size, in byteskernel.shmmax = 68719476736# # Controls the maximum number of shared memory segments, in pageskernel.shmall = 4294967296# TCP kernel paramaternet.ipv4.tcp_mem = 786432 1048576 1572864net.ipv4.tcp_rmem = 4096 87380 4194304net.ipv4.tcp_wmem = 4096 16384 4194304net.ipv4.tcp_window_scaling = 1net.ipv4.tcp_sack = 1# socket buffernet.core.wmem_default = 8388608net.core.rmem_default = 8388608net.core.rmem_max = 16777216net.core.wmem_max = 16777216net.core.netdev_max_backlog = 262144net.core.somaxconn = 20480net.core.optmem_max = 81920# TCP connnet.ipv4.tcp_max_syn_backlog = 262144net.ipv4.tcp_syn_retries = 3net.ipv4.tcp_retries1 = 3net.ipv4.tcp_retries2 = 15# tcp conn reusenet.ipv4.tcp_timestamps = 0net.ipv4.tcp_tw_reuse = 0net.ipv4.tcp_tw_recycle = 0net.ipv4.tcp_fin_timeout = 1net.ipv4.tcp_max_tw_buckets = 20000net.ipv4.tcp_max_orphans = 3276800net.ipv4.tcp_synack_retries = 1net.ipv4.tcp_syncookies = 1# keepalive connnet.ipv4.tcp_keepalive_time = 300net.ipv4.tcp_keepalive_intvl = 30net.ipv4.tcp_keepalive_probes = 3net.ipv4.ip_local_port_range = 10001 65000# swapvm.overcommit_memory = 0vm.swappiness = 10#net.ipv4.conf.eth2.rp_filter = 0#net.ipv4.conf.lo.arp_ignore = 1#net.ipv4.conf.lo.arp_announce = 2#net.ipv4.conf.all.arp_ignore = 1#net.ipv4.conf.all.arp_announce = 2