http://zhongcl.blog.51cto.com/1389550/1902252
解决办法：
登入root
进入/etc/resolv.conf
vim /etc/resolv.conf
修改内容为下（将DNS地址改为google域名服务器）
nameserver 8.8.8.8
nameserver 8.8.4.4
扩展：
resolv.conf是DNS域名解析的配置文件，它的格式很简单，每行以一个关键字开头，后接配置参数。resolv.conf的关键字主要有四个，分别是：
nameserver #定义DNS服务器的IP地址 domain #定义本地域名 search #定义域名的搜索列表 sortlist #对返回的域名进行排序
/etc/resolv.conf的一个示例：
domain test.com search www.test.com test.com nameserver 202.96.128.86 nameserver 202.96.128.166
最主要是nameserver关键字，如果没指定nameserver就找不到DNS服务器，其它关键字是可选的。
scp index.html [email protected]: /root:意思是将刚才下载的index.html文件发送到远程服务器上，目录是root目录
hostname:查看主机名
hostname abc.com:将主机名修改为abc.com但是这种更改只是更改当前的，电脑重启后又恢复原来的。如果要做修改的话：vi /etc/hostname进去修改。
nslookup www.baidu.com
vi /etc/hosts:可以修改IP地址所对应的域名。
ssh 192.168.5.90 :远程登录一个主机
vi /etc/resolv.conf:修改DNS的IP地址
--------------------------跟系统相关的命令--------------------------------
reboot:重启服务器
shutdaown -r now
init 6
init 0:关闭服务器
shutdown -h now:马上关机
shutdown -h 20:25:设置关机时间
mount /dev/cdrom /abc:挂载
umount /abc:取消挂载
df -h:查看挂载的情况
free:查看内存的情况
top:查看cpu的利用率
date:查看日期
cal:查看日历
cal 2014 :查看某一年的日历
date 030617002015:将日期设置为2015年的3月6日下午的5点钟
rpm -aq:列出系统中安装的所有程序
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打印SQL:SELECT a.case_id AS caseNum, b.name AS custName, a.case_amount AS caseAmount, e.name AS case_overdue_name, a.late_days AS lateDays, a.entrust_start_date AS entrustStartDate, a.entrust_end_date AS entrustEndDate, 0 AS case_process, ‘‘ AS teamName, ‘‘ AS staffName, a.id AS caseId, a.handin_time AS handin_time, a.permanent_collection, a.temporary_collection, a.case_call_type, (case when a.case_status >=0 and permanent_collection is null then ‘未分案‘ when a.case_status >= 0 then ‘在催‘ when a.case_status = -1 then ‘出催‘ when a.case_status <= -2 then ‘流转‘ end) as caseStatus, a.case_enter_date,a.case_end_time FROM dic_coll_consume.cf_case_info a, dic_coll_consume.cf_cust_essential_info b, dic_coll_consume.cf_case_stage_type e WHERE a.cust_id = b.id AND a.case_stage_type = e.id and (a.permanent_collection in (3) or a.temporary_collection in (3)) |
打印SQL:SELECT a.case_id AS caseNum, b.name AS custName, a.case_amount AS caseAmount, e.name AS case_overdue_name, a.late_days AS lateDays, a.entrust_start_date AS entrustStartDate, a.entrust_end_date AS entrustEndDate, 0 AS case_process, ‘‘ AS teamName, ‘‘ AS staffName, a.id AS caseId, a.handin_time AS handin_time, a.permanent_collection, a.temporary_collection, a.case_call_type, (case when a.case_status >=0 and permanent_collection is null then ‘未分案‘ when a.case_status >= 0 then ‘在催‘ when a.case_status = -1 then ‘出催‘ when a.case_status <= -2 then ‘流转‘ end) as caseStatus, a.case_enter_date,a.case_end_time FROM dic_coll_consume.cf_case_info a, dic_coll_consume.cf_cust_essential_info b, dic_coll_consume.cf_case_stage_type e WHERE a.cust_id = b.id AND a.case_stage_type = e.id and (a.permanent_collection in (3) or a.temporary_collection in (3))
打印SQL:SELECT a.case_id AS caseNum, b.name AS custName, a.case_amount AS caseAmount, e.name AS case_overdue_name, a.late_days AS lateDays, a.entrust_start_date AS entrustStartDate, a.entrust_end_date AS entrustEndDate, 0 AS case_process, ‘‘ AS teamName, ‘‘ AS staffName, a.id AS caseId, a.handin_time AS handin_time, a.permanent_collection, a.temporary_collection, a.case_call_type, (case when a.case_status >=0 and permanent_collection is null then ‘未分案‘ when a.case_status >= 0 then ‘在催‘ when a.case_status = -1 then ‘出催‘ when a.case_status <= -2 then ‘流转‘ end) as caseStatus, a.case_enter_date,a.case_end_time FROM dic_coll_consume.cf_case_info a, dic_coll_consume.cf_cust_essential_info b, dic_coll_consume.cf_case_stage_type e WHERE a.cust_id = b.id AND a.case_stage_type = e.id and (a.permanent_collection in (2698,2704,2705,2707,2708,2709,2710,2716,2719,2720,2717) or a.temporary_collection in (2698,2704,2705,2707,2708,2709,2710,2716,2719,2720,2717))
正常：
打印SQL:SELECT a.case_id AS caseNum, b.name AS custName, a.case_amount AS caseAmount, e.name AS case_overdue_name, a.late_days AS lateDays, a.entrust_start_date AS entrustStartDate, a.entrust_end_date AS entrustEndDate, 0 AS case_process, ‘‘ AS teamName, ‘‘ AS staffName, a.id AS caseId, a.handin_time AS handin_time, a.permanent_collection, a.temporary_collection, a.case_call_type, (case when a.case_status >=0 and permanent_collection is null then ‘未分案‘ when a.case_status >= 0 then ‘在催‘ when a.case_status = -1 then ‘出催‘ when a.case_status <= -2 then ‘流转‘ end) as caseStatus, a.case_enter_date,a.case_end_time FROM dic_coll_consume.cf_case_info a, dic_coll_consume.cf_cust_essential_info b, dic_coll_consume.cf_case_stage_type e WHERE a.cust_id = b.id AND a.case_stage_type = e.id and (a.permanent_collection in (2698,2704,2705,2707,2708,2709,2710,2716,2719,2720,2717) or a.temporary_collection in (2698,2704,2705,2707,2708,2709,2710,2716,2719,2720,2717))
打印SQL:SELECT a.case_id AS caseNum, b.name AS custName, a.case_amount AS caseAmount, e.name AS case_overdue_name, a.late_days AS lateDays, a.entrust_start_date AS entrustStartDate, a.entrust_end_date AS entrustEndDate, 0 AS case_process, ‘‘ AS teamName, ‘‘ AS staffName, a.id AS caseId, a.handin_time AS handin_time, a.permanent_collection, a.temporary_collection, a.case_call_type, (case when a.case_status >=0 and permanent_collection is null then ‘未分案‘ when a.case_status >= 0 then ‘在催‘ when a.case_status = -1 then ‘出催‘ when a.case_status <= -2 then ‘流转‘ end) as caseStatus, a.case_enter_date,a.case_end_time FROM dic_coll_consume.cf_case_info a, dic_coll_consume.cf_cust_essential_info b, dic_coll_consume.cf_case_stage_type e WHERE a.cust_id = b.id AND a.case_stage_type = e.id and (a.permanent_collection in (3) or a.temporary_collection in (3))
原文地址：https://www.cnblogs.com/bobc/p/8182286.html