用yum install httpd*安装的httpd服务器，默认是在目录 /etc/httpd下面

但是项目路径默认是在：/var/www/html下面，可以在httpd.conf配置文件里查看

如果 是网上下载的httpd来安装，就不同,这样需要启动的话，不能用service httpd start。

需要到目录下/apache2/bin/httpd。这样就可以启动了

安装 apache压缩

把下载下来的包放在 /usr/local/src 下，使用 tar zxvf httpd-NN.tar.gz解压，
cd httpd-NN
./configure --prefix=/usr/local/httpd
make
make install

现在你发现在/usr/local下面多出了一个httpd的目录
我们可以利用 /usr/local/httpd/bin/apachectl -k start|stop|restart 来管理httpd服务。
如果要随系统启动，我们必须在 /etc/rc.d/init.d/rc.local文件的末尾加上一行：
/usr/local/httpd/bin/apachectl -k start
即使是这样，但是我们还是不方便管理httpd服务，我们能不能，像rpm安装那样使用service服务来管理httpd服务呢？
答案是肯定的我们必须如下操作：
在 /etc/rc.d/init.d/下建立一个 httpd的文件，利用 chmod 755 httpd 使其具有执行能力。
vi httpd 添加如下内容：

#!/bin/bash
#
# httpd        Startup script for the Apache HTTP Server
#
# chkconfig: - 85 15
# description: Apache is a World Wide Web server.  It is used to serve \
#              HTML files and CGI.
# processname: httpd
# config: /etc/httpd/conf/httpd.conf
# config: /etc/sysconfig/httpd
# pidfile: /var/run/httpd.pid

# Source function library.
. /etc/rc.d/init.d/functions

if [ -f /etc/sysconfig/httpd ]; then
        . /etc/sysconfig/httpd
fi

# Start httpd in the C locale by default.
HTTPD_LANG=${HTTPD_LANG-"C"}

# This will prevent initlog from swallowing up a pass-phrase prompt if
# mod_ssl needs a pass-phrase from the user.
INITLOG_ARGS=""

# Set HTTPD=/usr/sbin/httpd.worker in /etc/sysconfig/httpd to use a server
# with the thread-based "worker" MPM; BE WARNED that some modules may not
# work correctly with a thread-based MPM; notably PHP will refuse to start.

# Path to the apachectl script, server binary, and short-form for messages.
apachectl=/usr/sbin/apachectl
httpd=${HTTPD-/usr/sbin/httpd}
prog=httpd
pidfile=${PIDFILE-/var/run/httpd.pid}
lockfile=${LOCKFILE-/var/lock/subsys/httpd}
RETVAL=0

# check for 1.3 configuration
check13 () {
        CONFFILE=/etc/httpd/conf/httpd.conf
        GONE="(ServerType|BindAddress|Port|AddModule|ClearModuleList|"
        GONE="${GONE}AgentLog|RefererLog|RefererIgnore|FancyIndexing|"
        GONE="${GONE}AccessConfig|ResourceConfig)"
        if LANG=C grep -Eiq "^[[:space:]]*($GONE)" $CONFFILE; then
                echo
                echo 1>&2 " Apache 1.3 configuration directives found"
                echo 1>&2 " please read /usr/share/doc/httpd-2.2.3/migration.html"
                failure "Apache 1.3 config directives test"
                echo
                exit 1
        fi
}

# The semantics of these two functions differ from the way apachectl does
# things -- attempting to start while running is a failure, and shutdown
# when not running is also a failure.  So we just do it the way init scripts
# are expected to behave here.
start() {
        echo -n {1}quot;Starting $prog: "
        check13 || exit 1
        LANG=$HTTPD_LANG daemon $httpd $OPTIONS
        RETVAL=$?
        echo
        [ $RETVAL = 0 ] && touch ${lockfile}
        return $RETVAL
}

# When stopping httpd a delay of >10 second is required before SIGKILLing the
# httpd parent; this gives enough time for the httpd parent to SIGKILL any
# errant children.
stop() {
        echo -n {1}quot;Stopping $prog: "
        killproc -d 10 $httpd
        RETVAL=$?
        echo
        [ $RETVAL = 0 ] && rm -f ${lockfile} ${pidfile}
}
reload() {
    echo -n {1}quot;Reloading $prog: "
    if ! LANG=$HTTPD_LANG $httpd $OPTIONS -t >&/dev/null; then
        RETVAL=$?
        echo {1}quot;not reloading due to configuration syntax error"
        failure {1}quot;not reloading $httpd due to configuration syntax error"
    else
        killproc $httpd -HUP
        RETVAL=$?
    fi
    echo
}

# See how we were called.
case "$1" in
  start)
        start
        ;;
  stop)
        stop
        ;;
  status)
        status $httpd
        RETVAL=$?
        ;;
  restart)
        stop
        start
        ;;
  condrestart)
        if [ -f ${pidfile} ] ; then
                stop
                start
        fi
        ;;
  reload)
        reload
        ;;
  graceful|help|configtest|fullstatus)
        $apachectl $@
        RETVAL=$?
        ;;
  *)
        echo {1}quot;Usage: $prog {start|stop|restart|condrestart|reload|status|fullstatus|graceful|help|configtest}"
        exit 1
esac

exit $RETVAL

使用chkconfig --add httpd

chkconfig --level 2345 httpd on

这样httpd就可以利用 service httpd start|stop|restart命令来管理了，
并且它在运行环境为2、3、4、5随系统启动。