When using ssh, the following error occurs: connect to host xxx. xxx port 22: Connection refused.
The cause of this error is that the ssh-server is not started or not installed (Ubuntu12.04 only openssh-client is installed by default, and openssh-server is not installed ).
1. Check whether openssh-sever is enabled.
Run the following command:
Ps-e | grep sshd
If no sshd process exists, run the followi
In debugging, connect localhost or 127.0.0.1 through the android simulator.CodeProbablyURL url = new URL (urlstring );Urlconnection urlconn = URL. openconnection ();
But an error is reported !!
Exception 1: java.net. connectexception: localhost/FIG: 8080-Connection refused
The problem is that the android simulator uses itself as the localhost. That is to say, it uses localhost or 127.0.0.1 in the code to
Tags: style blog http color io os SP data divU3D Connect SQL Server first System.Data.dll the Unity installation directory into the Asset/plugins directory of the project, and then write a script to connect to the database, in the above two steps without error, prompt this mistake, To consider whether the relevant services for SQL Server are turned on, and to enable the TCP/IP protocol in SQL Server Configuration Manager, proceed as followsOpen Start-Program-microsoft SQL Server 2005-configurati
Label:A possible title error when JDBC connects to an Oracle database:Oracle Connection IdentificationString url = "JDBC:ORACLE:THIN:@192.168.0.200:1521:ORCL";Must be associated withFiles: in Oracle\product\10.2.0\db_1\network\admin\tnsnames.ora:RHORCL =(DESCRIPTION =(Address_list =(ADDRESS = (PROTOCOL = TCP) (HOST = 192.168.0.200) (PORT = 1521)))(Connect_data =(service_name = ORCL)))Corresponding: The value of the corresponding host,port,service_name
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