Apache HTTP Server（简称Apache）是Apache软件基金会的一个开放源代码的网页服务器，可以在大多数电脑操作系统中运行，由于其跨平台（可以用于UNIX/Linux系统，甚至还可以用于Windows系统）、安全性并且可通过简单的API扩充，将Perl／Python等解释器编译到服务器中被广泛使用，是最流行的Web服务器端软件之一，但是默认只有256个并发连接，运行速度偏慢，效率较低。官方网站http://httpd.apache.org，Apache有两个版本分支：1.x和2.x，目前使用的都是2.x版本，最新版本为2.4.7，在系统中的进程名为httpd。
YUM安装Apache
1、查看系统是否安装Apache:
[root@justin ~]# rpm -qa|grep httpd httpd-2.2.15-15.el6_2.1.i686 httpd-tools-2.2.15-15.el6_2.1.i686 [root@justin ~]#系统默认安装了Apache，版本是2.2.15，发布号为15，el6表示在rhel6系列版本中发布，i686指32位PC架构
2、安装Apache:
[root@justin ~]# yum remove httpd* -y Removed: httpd.i686 0:2.2.15-15.el6_2.1 httpd-tools.i686 0:2.2.15-15.el6_2.1 Dependency Removed: gnome-user-share.i686 0:2.28.2-3.el6 Complete! [root@justin ~]# rpm -qa|grep httpd [root@justin ~]#先卸载掉已经安装的
[root@justin src]# yum install httpd -y Installed: httpd.i686 0:2.2.15-29.el6.centos Dependency Installed: httpd-tools.i686 0:2.2.15-29.el6.centos Complete! [root@justin src]# rpm -qa|grep httpd httpd-2.2.15-29.el6.centos.i686 httpd-tools-2.2.15-29.el6.centos.i686 [root@justin src]#3、启动Apache服务：
[root@justin ~]# chkconfig --level 35 httpd on [root@justin ~]# /etc/init.d/httpd start 正在启动 httpd：httpd: apr_sockaddr_info_get() failed for justin httpd: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName [确定] [root@justin ~]#
备注：Apache启动之后会提示错误：
正在启动 httpd:httpd: Could not reliably determine the
server's fully qualif domain name, using ::1 for ServerName
解决办法：
4、查看Apache占用的端口：
Apache使用的是80端口，Apache中默认设置了一个站点，此时直接在客户端IE里输入http://ServerIP就可以访问默认站点：http://10.15.72.38
Tips：如果无法访问确认防火墙和SeLinux状态
源码安装Apache
在生产环境中，大都是采用源码编译方式安装Apache，这样可灵活定制各种功能、及时获取软件的最新版本以及便于今后在不同的系统之间移植。
[root@justin src]# cd /usr/local/src/ && wget http://mirrors.hust.edu.cn/apache//httpd/httpd-2.4.7.tar.gz [root@justin httpd-2.4.7]# tar zxvf httpd-2.4.7.tar.gz [root@justin httpd-2.4.7]# cd httpd-2.4.7 [root@justin httpd-2.4.7]# mkdir -p /usr/local/apache [root@justin httpd-2.4.7]# ./configure --prefix=/usr/local/apache/ checking for chosen layout... Apache checking for working mkdir -p... yes checking for grep that handles long lines and -e... /bin/grep checking for egrep... /bin/grep -E checking build system type... i686-pc-linux-gnu checking host system type... i686-pc-linux-gnu checking target system type... i686-pc-linux-gnu configure: configure: Configuring Apache Portable Runtime library... configure: checking for APR... no configure: error: APR not found. Please read the documentation. [root@justin httpd-2.4.7]#
配置报错configure: error: APR not found. Please readthe documentation.未发现APR，这个是Apache关联软件，安装和apache版本相符版本，版本过早后面也会提示类似：configure: error: APR version x.x.x or later is required的错误
[root@justin httpd-2.4.7]# wget http://archive.apache.org/dist/apr/apr-1.5.0.tar.gz -P /usr/local/src/ [root@justin httpd-2.4.7]# cd .. [root@justin src]# tar zxvf apr-1.5.0.tar.gz [root@justin src]# cd apr-1.5.0 [root@justin apr-1.5.0]# mkdir -p /usr/local/apr [root@justin apr-1.5.0]# ./configure --prefix=/usr/local/apr/ checking build system type... i686-pc-linux-gnu checking host system type... i686-pc-linux-gnu checking target system type... i686-pc-linux-gnu Configuring APR library Platform: i686-pc-linux-gnu checking for working mkdir -p... yes APR Version: 1.5.0 checking for chosen layout... apr checking for gcc... no checking for cc... no checking for cl.exe... no configure: error: in `/usr/local/src/apr-1.5.0': configure: error: no acceptable C compiler found in $PATH See `config.log' for more details [root@justin apr-1.5.0]#
又出现了错误configure: error: no acceptable C compiler found in$PATH，从字面意思大致意思是没有发现可接受的C编辑器，因此需要安装下gcc套件
[root@justin apr-1.5.0]# yum install gcc -y
再次配置、编译、安装
[root@justin apr-1.5.0]# ./configure --prefix=/usr/local/apr/ [root@justin apr-1.5.0]# make [root@justin apr-1.5.0]# make install
apr安装好了再来安装apache
[root@justin src]# cd httpd-2.4.7 [root@justin httpd-2.4.7]# ./configure --prefix=/usr/local/apache/ checking for chosen layout... Apache checking for working mkdir -p... yes checking for grep that handles long lines and -e... /bin/grep checking for egrep... /bin/grep -E checking build system type... i686-pc-linux-gnu checking host system type... i686-pc-linux-gnu checking target system type... i686-pc-linux-gnu configure: configure: Configuring Apache Portable Runtime library... configure: checking for APR... yes setting CC to "gcc" setting CPP to "gcc -E" setting CFLAGS to " -g -O2 -pthread" setting CPPFLAGS to " -DLINUX -D_REENTRANT -D_GNU_SOURCE -D_LARGEFILE64_SOURCE" setting LDFLAGS to " " configure: configure: Configuring Apache Portable Runtime Utility library... configure: checking for APR-util... no configure: error: APR-util not found. Please read the documentation. [root@justin httpd-2.4.7]#
再次出错configure: error: APR-util not found. Please readthe documentation.没有找到APR-util，下载APR-util
[root@justin httpd-2.4.7]# wget http://archive.apache.org/dist/apr/apr-util-1.5.3.tar.gz -P /usr/local/src/ [root@justin httpd-2.4.7]# cd .. [root@justin src]# tar zxvf apr-util-1.5.3.tar.gz [root@justin src]# cd apr-util-1.5.3 [root@justin apr-util-1.5.3]# mkdir -p /usr/local/apr-util [root@justin apr-util-1.5.3]# ./configure --prefix=/usr/local/apr apr/ apr-util/ [root@justin apr-util-1.5.3]# ./configure --prefix=/usr/local/apr-util/ --with-apr=/usr/local/apr/bin/apr-1-config [root@justin apr-util-1.5.3]# make && make install
再次回到安装apache
已经安装好了APR-util还是提示没安装，我们需要在配置是指定他位置
[root@justin httpd-2.4.7]# ./configure --prefix=/usr/local/apache/ --with-apr=/usr/local/apr --with-apr-util=/usr/local/apr-util/ checking for chosen layout... Apache checking for working mkdir -p... yes checking for grep that handles long lines and -e... /bin/grep checking for egrep... /bin/grep -E checking build system type... i686-pc-linux-gnu checking host system type... i686-pc-linux-gnu checking target system type... i686-pc-linux-gnu configure: configure: Configuring Apache Portable Runtime library... configure: checking for APR... yes setting CC to "gcc" setting CPP to "gcc -E" setting CFLAGS to " -g -O2 -pthread" setting CPPFLAGS to " -DLINUX -D_REENTRANT -D_GNU_SOURCE -D_LARGEFILE64_SOURCE" setting LDFLAGS to " " configure: configure: Configuring Apache Portable Runtime Utility library... configure: checking for APR-util... yes checking for gcc... gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking how to run the C preprocessor... gcc -E checking for gcc option to accept ISO C99... -std=gnu99 checking for pcre-config... false configure: error: pcre-config for libpcre not found. PCRE is required and available from http://pcre.org/ [root@justin httpd-2.4.7]#编译安装就是这么坑，你需要解决一系列的依赖关系，再次提示错误configure: error: pcre-config forlibpcre not found. PCRE is required and available from http://pcre.org/，同样我们需要先安装这个pcre
[root@justin src]# wget http://jaist.dl.sourceforge.net/project/pcre/pcre/8.34/pcre-8.34.zip -P /usr/local/src/ [root@justin httpd-2.4.7]# cd .. [root@justin src]# unzip -o pcre-8.34.zip [root@justin src]# cd pcre-8.34 [root@justin pcre-8.34]# mkdir /usr/local/pcre [root@justin pcre-8.34]# ./configure --prefix=/usr/local/pcre/ checking for dirent.h... yes checking windows.h usability... no checking windows.h presence... no checking for windows.h... no configure: error: You need a C++ compiler for C++ support. [root@justin pcre-8.34]#configure: error: You need a C++ compiler forC++ support.需要安装C++，前面安装gcc的时候可以一起安装了，免得这步又的安装
[root@justin pcre-8.34]# yum install gcc-c++ -y
安装好再来安装pcre
[root@justin pcre-8.34]# ./configure --prefix=/usr/local/pcre/ [root@justin pcre-8.34]# make && make install
最后再回到安装Apache
[root@justin httpd-2.4.7]# ./configure --prefix=/usr/local/apache/ --with-apr=/usr/local/apr --with-apr-util=/usr/local/apr-util/ --with-pcre=/usr/local/pcre/ config.status: creating build/pkg/pkginfo config.status: creating build/config_vars.sh config.status: creating include/ap_config_auto.h config.status: executing default commands [root@justin httpd-2.4.7]# make && make install mkdir /usr/local/apache/man/man8 mkdir /usr/local/apache/manual make[1]: Leaving directory `/usr/local/src/httpd-2.4.7' [root@justin httpd-2.4.7]#
总算没有再报错，源码编译安装虽然灵活但是安装很复杂，需要解决一系列依赖关系问题，这里只是纯粹的安装Apache服务。仅能提供最基本的静态网站数据而已，想要实现动态网站的话，最好还是要PHP与MySQL的支持，
1、configure 这一步一般用来生成 Makefile，为下一步的编译做准备
2、make 这一步就是编译，大多数的源代码包都经过这一步进行编译（当然有些perl或python编写的软件需要调用perl或python来进行编译）。 如果 在 make 过程中出现 error ，你就要记下错误代码（注意不仅仅是最后一行），make 的作用是开始进行源代码编译，以及一些功能的提供，这些功能由他的 Makefile 设置文件提供相关的功能，make 是 Linux 开发套件里面自动化编译的一个控制程序，他通过借助 Makefile 里面编写的编译规范进行自动化的调用 gcc 、ld 以及运行某些需要的程序进行编译的程序。一般情况下，他所使用的 Makefile 控制代码，由 configure 这个设置脚本根据给定的参数和系统环境生成。
3、make install 这条命令来进行安装（当然有些软件需要先运行 make check 或 make test来进行一些测试），这一步一般需要你有 root 权限（因为要向系统写入文件），make install 一般表示进行安装，make uninstall 是卸载，