http://www.vpsa.net/?post=40
用了3年的linux，還是喜歡centos的風格，但沒辦法公司服務器一開始全部是ubuntu，到現在還一直用着ubuntu,今天把/etc/apache2目錄刪除了準備重裝下apache,搞了半天裝不上去，google了下還是沒成功，最後還是憑着自己對centos系統的感覺裝上去的，分享下經驗，免得以後誰碰到走彎路。
centos 有個命令是 yum list |grep httpd (查找出關於apache的安裝包)
以前一直以爲ubuntu沒，後臺仔細看了下還是有這命令就是 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
看這上面的，所以重裝應該先:
aptitude purge apache2 apache2.2-common
然後：
aptitude install apache2 apache2.2-common
這樣感覺deb系統aptitude命令比apt-get命令好用。