centos下httpd 启动失败的解决办法

[root@csit yang]# service httpd start
Starting
httpd:                                           
[FAILED]

----------------------------------------------------------------------------------------------------------------------------------------

[root@csit httpd]# cd
/etc/httpd/conf.d/   
#进入配置文件目录
[root@csit conf.d]$ grep NSSEngine
*   
#查找配置选项，并且知道在 nss.conf 这个文件中
nss.conf:NSSEngine on
[root@csit conf.d]$ vi  nss.conf
  
#注释NSSEngine
#   SSL Engine Switch:
#   Enable/Disable SSL for this
virtual host.
#NSSEngine on

[root@csit httpd]# service httpd
restart
Stopping
httpd:                                           
[  OK  ]
Starting httpd:                                             
[  OK  ]