nginx: [crit] pwrite() "/usr/loc

重启服务器出现：

[root@iZ94hr99do9Z ~]# service nginx restart
Stoping nginx...  done
Starting nginx...  done
nginx: [crit] pwrite() "/usr/local/nginx/logs/nginx.pid" failed (28: No space left on device)

问题分析：
这是在告诉你服务器磁盘满了，需要清理或者开放空间磁盘大小！

解决方案：

[root@iZ94hr99do9Z ~]# free -h

[root@iZ94hr99do9Z ~]# sync

[root@iZ94hr99do9Z ~]# echo 1 > /proc/sys/vm/drop_caches

[root@iZ94hr99do9Z ~]# echo 2 > /proc/sys/vm/drop_caches

[root@iZ94hr99do9Z ~]# echo 3 > /proc/sys/vm/drop_caches

[root@iZ94hr99do9Z ~]# service nginx restart

完美解决！！！