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MySQL CONCAT returns NULL if any field contain NULL
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answered Nov 27 '14 at 0:04
Ken4EdgeKen4Edge
13911 silver badge22 bronze badges
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ssh: Could not resolve hostname [hostname]: nodename nor servname provided, or not known
...I had already:
installed and tested ssh on my home network.
Set a static IP for my pi.
Set up a Dynamic DNS service and installed the software on my pi.
I referenced these instructions for setting up the static ip, and there are many more instructional resources out there.
Also, I set up port f...
How to split a string and assign it to variables
...import (
"fmt"
"strings"
)
func main() {
s := strings.Split("127.0.0.1:5432", ":")
ip, port := s[0], s[1]
fmt.Println(ip, port)
}
Output:
127.0.0.1 5432
One step, for example,
package main
import (
"fmt"
"net"
)
func main() {
host, port, err := net.SplitHostP...
java.net.ConnectException: Connection refused
...
This exception means that there is no service listening on the IP/port you are trying to connect to:
You are trying to connect to the wrong IP/Host or port.
You have not started your server.
Your server is not listening for connections.
On Windows servers, the listen backlog queue is f...
Unable to Connect to GitHub.com For Cloning
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bnguyen82bnguyen82
5,16055 gold badges2727 silver badges3535 bronze badges
1
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std::string的截取字符串的方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
std::string的截取字符串的方法例如截取ip:port，代码如下：std::string ip("127.0.0.1:8888");int index = ip.find_last_of(':'); ipip.substr(0, index)....例如截取ip:port，代码如下：
std::string ip("127.0.0.1:8888");
int index = ip.find_last_of(':');
//ip
ip.substr(0, in...
Possible reasons for timeout when trying to access EC2 instance
...he same problem, and the solution ended up being adding my
local machine's IP to the list of inbound rules in the active security
group. In the inbound dialog below, enter 22 in the port range, your local IP/32 in the source field, and leave 'custom tcp rule' in the dropdown.
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Forward host port to docker container
... Is it possible to do this somehow, if the host is only listening on 127.0.0.1?
– HansHarhoff
Oct 5 '16 at 14:34
5
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Connect Device to Mac localhost Server? [closed]
How do I allow any device, e.g., iPhone, to connect over a WLAN to my Mac's localhost server?
14 Answers
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How can i use iptables on centos 7? [closed]
...am trying to open 80 port for httpd service, but something wrong with my iptables service ... what's wrong with it? What am I doing wrong?
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