安装php后启动apache报错

安装php5.1.6后，启动apache报如下错误：

httpd: Syntax error on line 53 of /usr/local/apache/conf/httpd.conf: Cannot load /usr/local/apache/modules/libphp5.so into server: /usr/local/apache/modules/libphp5.so: cannot restore segment prot after reloc: Permission denied
[root@localhost bin]# vi /usr/local/apache/conf/httpd.conf

在网上查询后，据称是Linux有一个SELinux保护模式引起的。找到如下解决方式：

chcon /usr/local/apache/modules/libphp5.so -t shlib_t

chcon的用法如下：

chcon --help
Usage: chcon [OPTION]... CONTEXT FILE...
  or:  chcon [OPTION]... [-u USER] [-r ROLE] [-l RANGE] [-t TYPE] FILE...
  or:  chcon [OPTION]... --reference=RFILE FILE...
Change the security context of each FILE to CONTEXT.

  -c, --changes          like verbose but report only when a change is made
  -h, --no-dereference   affect symbolic links instead of any referenced file
                         (available only on systems with lchown system call)
  -f, --silent, --quiet  suppress most error messages
      --reference=RFILE  use RFILE's group instead of using a CONTEXT value
  -u, --user=USER        set user USER in the target security context
  -r, --role=ROLE        set role ROLE in the target security context
  -t, --type=TYPE        set type TYPE in the target security context
  -l, --range=RANGE      set range RANGE in the target security context
  -R, --recursive        change files and directories recursively
  -v, --verbose          output a diagnostic for every file processed
      --help             display this help and exit
      --version          output version information and exit