另一种方法是在基于debian的系统上检查包(包括Apache)安装的版本，我们可以使用:

apt-cache policy <package_name>

例如Apache

apt-cache policy apache2

它将显示如下内容(查看Installed行):

$ apt-cache policy apache2
apache2:
  Installed: (none)
  Candidate: 2.2.22-1ubuntu1.9
  Version table:
     2.2.22-1ubuntu1.9 0
        500 http://hk.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu/ precise-security/main amd64 Packages
     2.2.22-1ubuntu1 0
        500 http://hk.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages

试试apachectl -V:

$ apachectl -V
Server version: Apache/2.2.9 (Unix)
Server built:   Sep 18 2008 21:54:05
Server's Module Magic Number: 20051115:15
Server loaded:  APR 1.2.7, APR-Util 1.2.7
Compiled using: APR 1.2.7, APR-Util 1.2.7
... etc ...

如果不成功，请使用sudo命令运行该命令。

或者，不那么直接地说:

nmap -A localhost -p

对我来说，这适用于Debian 6(挤压):

Linux www809 2.6.26-2-xen-686 #1 SMP Wed Sep 21 09:56:47 UTC 2011 i686 GNU/Linux

我必须走上正确的道路:

/usr/local/apache/bin** $ **./apachectl -v

./apachectl:第71行:ulimit:打开文件:不能修改limit:不允许操作 服务器版本:Apache/2.2.21 (Unix) 服务器构建:2011年12月17日19:57:53

用sudo试试

apachectl -V
-bash: apachectl: command not found

sudo apachectl -V
Server version: Apache/2.4.6 (Debian)
Server built:   Aug 12 2013 18:20:23
Server's Module Magic Number: 20120211:24
Server loaded:  APR 1.4.8, APR-UTIL 1.5.3
Compiled using: APR 1.4.8, APR-UTIL 1.5.2
Architecture:   32-bit
Server MPM:     prefork
  threaded:     no
  forked:     yes (variable process count)
Server compiled with....
bla bla....

另一种方法是在基于debian的系统上检查包(包括Apache)安装的版本，我们可以使用:

apt-cache policy <package_name>

例如Apache

apt-cache policy apache2

它将显示如下内容(查看Installed行):

$ apt-cache policy apache2
apache2:
  Installed: (none)
  Candidate: 2.2.22-1ubuntu1.9
  Version table:
     2.2.22-1ubuntu1.9 0
        500 http://hk.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu/ precise-security/main amd64 Packages
     2.2.22-1ubuntu1 0
        500 http://hk.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages