Ubuntu安装apache及问题解决

1.安装apache需要下载4个软件包：

httpd-2.4.3.tar.bz2                           ---http server
apr-1.4.6.tar.bz2                              ---apr
apr-util-1.5.1.tar.bz2                        ---apr-util
pcre-8.31.tar.bz2                             ---pcre


安装完后面3个依赖包后，按照httpd，./configure 时加上参数 --with-apr=/usr/local/apr/ --with-apr-util=/usr/local/apr-util/ --with-pcre=/usr/local/pcre
然后make，make install

添加apache服务到开机自动启动

$cp  /usr/local/apache2/bin/apachectl /etc/init.d/
$update-rc.d apachectl defaults

启动apache， /etc/init.d/apachectl start,报如下错误：

/usr/local/apache2/bin/httpd: error while loading shared libraries: libpcre.so.1: cannot open shared object file: No such file or directory

# ldd httpd
linux-vdso.so.1 => (0x00007fff691ff000)
libpcre.so.1 => not found
libaprutil-1.so.0 => /usr/local/apache2/lib/libaprutil-1.so.0 (0x00007ff847f31000)
libapr-1.so.0 => /usr/local/apache2/lib/libapr-1.so.0 (0x00007ff847d00000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007ff847ae3000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007ff847726000)
libexpat.so.0 => /usr/local/apache2/lib/libexpat.so.0 (0x00007ff8474fb000)
libcrypt.so.1 => /lib/x86_64-linux-gnu/libcrypt.so.1 (0x00007ff8472c2000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007ff8470be000)
/lib64/ld-linux-x86-64.so.2 (0x00007ff848165000)

显示 libpcre.so.1 => not found
解决方法：
1. 搜索libpcre.so.1文件，发现该文件在/usr/local/lib目录下。
2. 在/etc/ld.so.conf.d目录下新建文件libc.conf，将/usr/local/lib目录加到该文件：

/usr/local/lib

3. 执行ldconfig命令：

#sudo ldconfig

4. 使用ldd命令确认libpcre.so.1是否已找到：

# ldd httpd
linux-vdso.so.1 =>  (0x00007fffcc3ff000)
libpcre.so.1 => /usr/local/lib/libpcre.so.1 (0x00007f2f68f98000)
libaprutil-1.so.0 => /usr/local/apache2/lib/libaprutil-1.so.0 (0x00007f2f68d76000)
libapr-1.so.0 => /usr/local/apache2/lib/libapr-1.so.0 (0x00007f2f68b45000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f2f68928000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f2f6856b000)
libexpat.so.0 => /usr/local/apache2/lib/libexpat.so.0 (0x00007f2f68340000)
libcrypt.so.1 => /lib/x86_64-linux-gnu/libcrypt.so.1 (0x00007f2f68107000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f2f67f03000)
/lib64/ld-linux-x86-64.so.2 (0x00007f2f691c7000)