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How can I remove specific rules from iptables?
...ication
-D, --delete chain rulenum
Delete one or more rules from the selected chain.
There are two versions of this command:
the rule can be specified as a number in the chain (starting at 1 for the first rule) or a rule to match.
Do realize this command, like all other command(-A...
SQL SELECT speed int vs varchar
...k: A=261MB B=292MB C=322MB
Non-indexed by id: select count(*), select by id: 450ms same on all tables
Insert* one row per TX: B=9ms/record C=9ms/record
Bulk insert* in single TX: B=140usec/record C=180usec/record
Indexed by id, select by id: B=about 2...
Best TCP port number range for internal applications [closed]
...
Short answer: use an unassigned user port
Over achiever's answer - Select and deploy a resource discovery solution. Have the server select a private port dynamically. Have the clients use resource discovery.
The risk that that a server will fail because the port it wants to listen on is n...
How can I detect if the user is on localhost in PHP?
...
You can also use $_SERVER['REMOTE_ADDR'] for which IP address of the client requesting is given by the web server.
$whitelist = array(
'127.0.0.1',
'::1'
);
if(!in_array($_SERVER['REMOTE_ADDR'], $whitelist)){
// not valid
}
...
虚拟机ubuntu与宿主机NAT方式设定静态IP共享上网 - 更多技术 - 清泛网 - 专...
虚拟机ubuntu与宿主机NAT方式设定静态IP共享上网前阵子虚拟机安装Ubuntu 10.10后一直不能上网，折腾了好几天终于可以了，在这里写个记录备忘哈哈ubuntu安装参考 点击打开链接http: ...前阵子虚拟机安装Ubuntu 10.10后一直不能上...
Listing all permutations of a string/integer
...(IEnumerable<T> list, int length)
{
if (length == 1) return list.Select(t => new T[] { t });
return GetPermutations(list, length - 1)
.SelectMany(t => list.Where(e => !t.Contains(e)),
(t1, t2) => t1.Concat(new T[] { t2 }));
}
Example:
IEnumerable<...
How to get a Docker container's IP address from the host
Is there a command I can run to get the container's IP address right from the host after a new container is created?
52 Ans...
Access mysql remote database from command line
...below command:
mysql -u {username} -p'{password}' \
-h {remote server ip or name} -P {port} \
-D {DB name}
For example
mysql -u root -p'root' \
-h 127.0.0.1 -P 3306 \
-D local
no space after -p as specified in the documentation
It will take you to the mysql console dir...
Oracle SELECT TOP 10 records
I have an big problem with an SQL Statement in Oracle. I want to select the TOP 10 Records ordered by STORAGE_DB which aren't in a list from an other select statement.
...
What is the largest Safe UDP Packet Size on the Internet
...
It is true that a typical IPv4 header is 20 bytes, and the UDP header is 8 bytes. However it is possible to include IP options which can increase the size of the IP header to as much as 60 bytes. In addition, sometimes it is necessary for intermedia...