Step One: Download nexus 3.x ( speed thief slow )
https://help.sonatype.com/repomanager3/download/download-archives---repository-manager-3
Step two: upload to the server
Get two folders nexus-3.20.1-01 sonatype-work after decompression
cd to the bin directory (Below is my current directory)
/root/nexus/nexus-3.20.1-01-unix/nexus-3.20.1-01/binStart command execution
./nexus startIf you want to modify the port, and if you do not need to modify skip
cd /root/nexus/nexus-3.20.1-01-unix/nexus-3.20.1-01/etc
After starting, if nginx, then increase their own maps.
65536 General will prompt an error, modify the following figure
Note After you change ulimit -a ( verification )
If you do not take effect, disconnect re-login
vi /etc/security/limits.conf 
At this point, the server has been configured.
Begin configuring the local environment
Modify the local maven setting.xml
<?xml version="1.0" encoding="UTF-8"?>
<!--
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.
-->
<!--
| This is the configuration file for Maven. It can be specified at two levels:
|
| 1. User Level. This settings.xml file provides configuration for a single user,
| and is normally provided in ${user.home}/.m2/settings.xml.
|
| NOTE: This location can be overridden with the CLI option:
|
| -s /path/to/user/settings.xml
|
| 2. Global Level. This settings.xml file provides configuration for all Maven
| users on a machine (assuming they're all using the same Maven
| installation). It's normally provided in
| ${maven.conf}/settings.xml.
|
| NOTE: This location can be overridden with the CLI option:
|
| -gs /path/to/global/settings.xml
|
| The sections in this sample file are intended to give you a running start at
| getting the most out of your Maven installation. Where appropriate, the default
| values (values used when the setting is not specified) are provided.
|
|-->
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
<!-- localRepository
| The path to the local repository maven will use to store artifacts.
|
| Default: ${user.home}/.m2/repository
<localRepository>/path/to/local/repo</localRepository>
-->
<!-- interactiveMode
| This will determine whether maven prompts you when it needs input. If set to false,
| maven will use a sensible default value, perhaps based on some other setting, for
| the parameter in question.
|
| Default: true
<interactiveMode>true</interactiveMode>
-->
<!-- offline
| Determines whether maven should attempt to connect to the network when executing a build.
| This will have an effect on artifact downloads, artifact deployment, and others.
|
| Default: false
<offline>false</offline>
-->
<!-- pluginGroups
| This is a list of additional group identifiers that will be searched when resolving plugins by their prefix, i.e.
| when invoking a command line like "mvn prefix:goal". Maven will automatically add the group identifiers
| "org.apache.maven.plugins" and "org.codehaus.mojo" if these are not already contained in the list.
|-->
<pluginGroups>
<!-- pluginGroup
| Specifies a further group identifier to use for plugin lookup.
<pluginGroup>com.your.plugins</pluginGroup>
-->
</pluginGroups>
<!-- proxies
| This is a list of proxies which can be used on this machine to connect to the network.
| Unless otherwise specified (by system property or command-line switch), the first proxy
| specification in this list marked as active will be used.
|-->
<proxies>
<!-- proxy
| Specification for one proxy, to be used in connecting to the network.
|
<proxy>
<id>optional</id>
<active>true</active>
<protocol>http</protocol>
<username>proxyuser</username>
<password>proxypass</password>
<host>proxy.host.net</host>
<port>80</port>
<nonProxyHosts>local.net|some.host.com</nonProxyHosts>
</proxy>
-->
</proxies>
<!-- servers
| This is a list of authentication profiles, keyed by the server-id used within the system.
| Authentication profiles can be used whenever maven must make a connection to a remote server.
|-->
<servers>
<server>
<id>releases</id>
<username>admin</username>
<password>xxx</password>
<filePermissions>664</filePermissions>
<!--目录被创建时的权限。 -->
<directoryPermissions>775</directoryPermissions>
</server>
<server>
<id>snapshots</id>
<username>admin</username>
<password>xxx</password>
<filePermissions>664</filePermissions>
<!--目录被创建时的权限。 -->
<directoryPermissions>775</directoryPermissions>
</server>
</servers>
<!--为仓库列表配置的下载镜像列表。 -->
<mirrors>
<mirror>
<!--该镜像的唯一标识符。id用来区分不同的mirror元素。 -->
<id>nexus</id>
<!--此处配置所有的构建均从私有仓库中下载 *代表所有，也可以写central -->
<mirrorOf>*</mirrorOf>
<name>central repository</name>
<!--该镜像的URL。构建系统会优先考虑使用该URL，而非使用默认的服务器URL。 -->
<url>http://nexus.xxx.com/repository/maven-public/</url>
</mirror>
</mirrors>
<profiles>
<profile>
<id>nexus</id>
<!--远程仓库列表，它是Maven用来填充构建系统本地仓库所使用的一组远程项目。 -->
<repositories>
<!--发布版本仓库-->
<repository>
<id>nexus</id>
<!--地址是nexus中repository（Releases/Snapshots）中对应的地址-->
<url>http://nexus.xxx.com/repository/maven-public/</url>
<!--true或者false表示该仓库是否为下载某种类型构件（发布版，快照版）开启。 -->
<releases>
<enabled>true</enabled>
</releases>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
</repositories>
</profile>
</profiles>
<!--激活配置-->
<activeProfiles>
<!--profile下的id-->
<activeProfile>nexus</activeProfile>
</activeProfiles>
<!-- activeProfiles
| List of profiles that are active for all builds.
|
<activeProfiles>
<activeProfile>alwaysActiveProfile</activeProfile>
<activeProfile>anotherAlwaysActiveProfile</activeProfile>
</activeProfiles>
-->
</settings>
pom.xml
<distributionManagement>
<repository>
<id>releases</id>
<name>Nexus Release Repository</name>
<url>http://nexus.xxx.com/repository/maven-releases/</url>
</repository>
<snapshotRepository>
<id>snapshots</id>
<name>Nexus Snapshots Repository</name>
<url>http://nexus.xxx.com/repository/maven-snapshots/</url>
</snapshotRepository>
</distributionManagement>
Configuration, run deploy release.
