cname

nslookup工具的使用方法 配置好DNS服务器，添加了相应的记录之后，只要IP地址保持不变，一般情况下我们 就不再需要去维护DNS的数据文件了。不过在确认域名解释正常之前我们最好是测试 一下所有的配置是否正常。许多人会简单地使用ping命令检查一下就算了。不过Ping 指令只是一个检查网络联通情况的命令，虽然在输入的参数是域名的情况下会通过DNS进行查询，但是它只能查询A类型和CNAME类型的记录，而且只会告诉你域名是否存在，其他的信息一概欠奉。所以如果你需要对DNS的故障进行排错就必须熟练另一个更强大的工具nslookup。这个命令可以指定查询的类型，可以查到DNS记录的生存时间还可以指定使用那个DNS服务器进行解释。 　　查询IP地址 　　nslookup最简单的用法就是查询域名对应的IP地址，包括A记录和CNAME记录，如果查到的是CNAME记录还会返回别名记录的设置情况。其用法是： 　　nslookup 域名 　　以下是A记录的返回情况。 　　nslookup命令会采用先反向解释获得使用的DNS服务器的名称，由于我这里使用的是一个内部的DNS服务器所以没有正确的反向记录，导致结果的前面几行出错。大家可以不必理会。重点看的是最后的两行这里看到的是 www.oray.net 的IP地址是61.145.112.212。注意即使 www.oray.net

I am in the process of setting up MX records on a HEROKU hosted app and am running into issues. I have two CNAME's setup: @ myapp.herokuapp.com www myapp.herokuapp.com Site works fine as setup above. I am now trying to add email support by adding Google Apps MX records. @ ASPMX.L.GOOGLE.COM. MX 10 1800 --as well as four other MX fall backs-- Google Apps is saying it can't read the MX records. Is this because they are conflicting with the @ CNAME record? If so, should I drop that and used the "Naked Domain" method (Setup three A records instead). Heroku makes it sounds like this method is

I have an openshift wordpress blog running at http://blog-example.rhcloud.com/ and added CNAME records in my DNS management as follows. example.com www.example.com and works fine. When i type, this leads to my blog home page.But the pages and links in the blog actually leads to openshift naming space. i.e., blog-example.rhcloud.com/?page_id=7 I just want to mask blog-example.rhcloud.com/ to example.com every where in my app.I would be happy to provide further information if any thing required to analyse the issue. PS: I bought the domain from Big Rock and using their console for CNAME entry.

I have hosted an app on Redhat Open shift. I didn't change anything but it started redirecting to https://www.plovist.com/app and throwing 404 error. Can anyone help me in solving this? Make sure that you have correctly added your alias to your application (www.plovist.com) I logged into Godaddy(my DNS) account and found out that in Cnames(Alias) www wasn't pointing to mydjango-plovist.rhcloud.com (URL given by Openshift). Also I pinged mydjango-plovist.rhcloud.com and it gave a different IP Address than one I had written in A Record. So I pointed in Cname to mydjango-plovist.rhcloud.com and

1.JavaScript原生移除class方法 window.onload = function () { var stamp = document.getElementById("btGetCode"); //根据id查找到该标签 removeClass(stamp, "can-code"); //调用JS原生删除class的方法 function hasClass(elements, cName) { return !!elements.className.match(new RegExp("(\\s|^)" + cName + "(\\s|$)")); // ( \\s|^ ) 判断前面是否有空格 （\\s | $ ）判断后面是否有空格 两个感叹号为转换为布尔值 以方便做判断 }; function removeClass(elements, cName) { if (hasClass(elements, cName)) { elements.className = elements.className.replace(new RegExp("(\\s|^)" + cName + "(\\s|$)"), " "); // replace方法是替换 }; }; }; 2.JavaScript原生添加class方法 window.onload = function () {

Which should I pick and why? Firebase recommends CNAME records but why? Isn't it better to point to the ip address rather than point to another domain that points to the ip address? Firebase recommends CNAME records but why? Firebase hosting is probably marking CNAME records as recommended because they are widely allowed for setup by registrars and the easiest to setup for most novices when setting up their wildcards. Isn't it better to point to the ip address rather than point to another domain that points to the ip address? YES you are correct. It is going to be a faster lookup because it

域名解析 | A记录 ，CNAME，MX，NS 你懂了吗 域名解析 什么是域名解析？域名解析就是国际域名或者国内域名以及中文域名等域名申请后做的到IP地址的转换过程。IP地址是网路上标识您站点的数字地址，为了简单好记，采用域名来代替ip地址标识站点地址。域名的解析工作由DNS服务器完成。 如下图，百度 www.baidu.com 就是域名，解析出来的IP 14.216.177.30 这个过程就是域名解析。 A 记录 A (Address) 记录是用来指定主机名（或域名）对应的IP地址记录。用户可以将该域名下的网站服务器指向到自己的web server上。同时也可以设置您域名的二级域名。又称IP指向，用户可以在此设置子域名并指向到自己的目标主机地址上，从而实现通过域名找到服务器。 　　说明： 　　·指向的目标主机地址类型只能使用IP地址； 　　1) 添加A记录 　　在“主机名”中填入子域的名字，“类型”为A，“IP地址/主机名”中填入web服务器的IP地址，点击“新增”按钮即可。 　　注：如果“主机名”一栏为空则表示对域名mydomain.com本身做指向。 　　2) 修改A记录 　　只要在“IP地址/主机名”一栏中将原来的IP地址直接修改为新IP地址，然后点击“修改”按钮即可。 　　3) 删除A记录 　　点击要删除的A记录后面对应的“删除”按钮即可。 　　4) 泛域名解析 　

是网上早的题目，答案大部分是我自己写的，部分是别人的答案 insert into Student values('01' , '赵雷' , '1990-01-01' , '男'); insert into Student values('02' , '钱电' , '1990-12-21' , '男'); insert into Student values('03' , '孙风' , '1990-05-20' , '男'); insert into Student values('04' , '李云' , '1990-08-06' , '男'); insert into Student values('05' , '周梅' , '1991-12-01' , '女'); insert into Student values('06' , '吴兰' , '1992-03-01' , '女'); insert into Student values('07' , '郑竹' , '1989-07-01' , '女'); insert into Student values('08' , '王菊' , '1990-01-20' , '女'); insert into Course values('01' , '语文' , '02'); insert into Course values(