ubuntu下的apache重装 [Web服务器]

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用了3年的linux，还是喜欢centos的风格，但没办法公司服务器一开始全部是ubuntu，到现在还一直用着ubuntu,今天把/etc/apache2目录删除了准备重装下apache,搞了半天装不上去，google了下还是没成功，最后还是凭着自己对centos系统的感觉装上去的，分享下经验，免得以后谁碰到走弯路。

centos 有个命令是 yum list |grep httpd (查找出关于apache的安装包)

以前一直以为ubuntu没，后台仔细看了下还是有这命令就是 aptitude search apache2

root@Nginx:~# aptitude search apache2
i   apache2                         - Apache HTTP Server metapackage
v   apache2-dev                     -
p   apache2-doc                     - Apache HTTP Server documentation
v   apache2-mpm                     -
p   apache2-mpm-event               - Apache HTTP Server - event driven model
p   apache2-mpm-itk                 - multiuser MPM for Apache 2.2
p   apache2-mpm-prefork             - Apache HTTP Server - traditional non-threa
i A apache2-mpm-worker              - Apache HTTP Server - high speed threaded m
p   apache2-prefork-dev             - Apache development headers - non-threaded
p   apache2-src                     - Apache source code
p   apache2-suexec                  - Standard suexec program for Apache 2 mod_s
p   apache2-suexec-custom           - Configurable suexec program for Apache 2 m
i   apache2-threaded-dev            - Apache development headers - threaded MPM
i A apache2-utils                   - utility programs for webservers
i   apache2.2-common                - Apache HTTP Server common files
p   gforge-web-apache2              - collaborative development tool - web part
p   libapache2-authcassimple-perl   - Apache2 module to authentificate trough a