需求描述：

在本機上之前已經部署了一個專案，可以通過localhost/pro1訪問，現在要新開發一個專案，如何通過localhost/pro2訪問？

本機環境：

ubuntu1604
apache2: 在/etc/apache2/目錄下，通過sudo apt-get apache2自動安裝。
若在安裝好後啟動apache2時提示各種directory未配置時，可以先source /etc/apache2/envvars，讓apache2的配置檔案生效。

解決方法

首先需要新增新埠。在site-available資料夾下複製000-default.conf檔案，並重命名，可隨意，假設為8081.conf。開啟檔案進行修改，下面是我修改好後的內容。

其中8081是我設定的新埠，可根據自己需求進行修改；
ServerName與ServerAlias也需要根據需求修改，ServerName即在瀏覽器端訪問的路徑，ServerAlias即路徑別名，
在此處我省略掉了埠號，並將專案名稱新增進來，這樣有多個專案時，即可通過專案名稱來加以區分，而不用考慮其埠區別，對外界訪問更友好；
Directory節點是專案所在路徑，要保證目錄下存在index.html檔案，這樣在訪問ServerAlias或ServerName時會自動載入改頁面；
其他內容不變。

<VirtualHost *:8081>
    # The ServerName directive sets the request
 
 scheme, hostname and port that
    # the server uses to identify itself. This is used when creating
    # redirection URLs. In the context of virtual hosts, the ServerName
    # specifies what hostname must appear in the request's Host: header to
    # match this virtual host. For the default virtual host (this file) this
    # value is
 
 not decisive as it is used as a last resort host regardless.
    # However, you must set it for any further virtual host explicitly.
    ServerName 127.0.0.1:8081
    ServerAlias 127.0.0.1/two 
    ServerAdmin [email protected]
    DocumentRoot /var/www/html
    <Directory /home/mamq/work/two/>
        AllowOverride All
    </Directory>

    # Available loglevels: trace8, ..., trace1, debug, info, notice, warn,
    # error, crit, alert, emerg.
    # It is also possible to configure the loglevel for particular
    # modules, e.g.
    #LogLevel info ssl:warn

    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined

    # For most configuration files from conf-available/, which are
    # enabled or disabled at a global level, it is possible to
    # include a line for only one particular virtual host. For example the
    # following line enables the CGI configuration for this host only
    # after it has been globally disabled with "a2disconf".
    #Include conf-available/serve-cgi-bin.conf
</VirtualHost>

# vim: syntax=apache ts=4 sw=4 sts=4 sr noet

輸入以下命令使埠生效：sudo a2ensite 8081.conf
然後，修改/etc/apache2/apache2.conf檔案，新增如下內容：

ServerName 127.0.0.1:80

Alias /VES "/home/mamq/work/one"
<Directory "/home/mamq/work/one">
  Options Indexes MultiViews FollowSymLinks
  AllowOverride None
  Order deny,allow
  Allow from all
</Directory>

Alias /ARCTIC "/home/mamq/work/two"
<Directory "/home/mamq/work/two">
  Options Indexes MultiViews FollowSymLinks
  AllowOverride None
  Order deny,allow
  Allow from all
</Directory>

重啟apache2. service apache2 restart
通過以上設定，在瀏覽器端輸入localhost/one與localhost/two即可分別訪問兩個專案，兩個專案分別對應80和8081埠。若需要在區域網內其他機器訪問，需要在防火牆中開啟埠。
在centos伺服器上apache是以httpd的形式存在，要達到上述目的要稍微複雜點，方法略有不同，等之後有時間再更新上來。

以上，歡迎交流。