OpenSSH keeps the public key data of known server hosts in the $HOME/.ssh/known_hosts file.
~/.ssh/known_hosts
usually it in : /home/user_name/.ssh/known_hosts
"A server.met file is a file containing a list of eD2K servers. These servers are eDonkey servers used by eMule, which is an open source Windows client for KAD networks."
HTTP
No; users communicate over a group of centralized servers, so this is a client-server system.No; users communicate over a group of centralized servers, so this is a client-server system.No; users communicate over a group of centralized servers, so this is a client-server system.No; users communicate over a group of centralized servers, so this is a client-server system.
Client servers are really only limited by the constraints of what the operating system can cope with. Many modern file-servers have hard drive capacities running to many terabytes of storage.
The Difference Between a File Server & an FTP ServerFunctiono File servers store data for an entire network, just as an individual computer's hard drive stores data for that individual computer. File Transfer Protocol (FTP) servers run an FTP application to exchange files over the Internet, which is the world's largest network.Similaritieso File serving and FTP serving are both networking methods that involve file transfer between computers. FTP servers need to work together with file servers in order to function. In a network using FTP, file servers store data while FTP servers transmit that data over the Internet, with both being necessary for file transfer to occur.Differenceso FTP servers download files from or upload files to file servers. FTP servers move files to and from file server locations. FTP servers require file servers, but file servers do not require FTP servers, since file servers also serve various intranet networks not connected to the Internet.http://www.ehow.com/facts_6885629_difference-file-server-ftp-server.html-RLSB
A server waits for a request by a client. When the client sends the requests, the server answers to it. Examples are file servers, that listen to requests from clients wanting to save or retrieve files; print servers that wait for requests to print (and then print them); DHCP servers that wait for requests to provide IP addresses; etc.
A client is the requesting program or user in a client/server relationship. For example, the user of a Web browser is effectively making client requests for pages from servers all over the Web. The browser itself is a client in its relationship with the computer that is getting and returning the requested HTML file. The computer handling the request and sending back the HTML file is a server.
In short, it listens to some port (usually 80 or 443) on the network until a client connects to it. At that point, the client will request a file. The server will determine if the client is authorized to view the content, and if so, it will send the contents of the file, or the result of executing the file as a program, back to the client. It will then wait for the next request to come through the network. Most servers actually wait on multiple connections at once, so that one user can not monopolize the server for a long period of time, and there are other complexities in a server that are not covered here.
Types of computer servers include web servers and storage servers. A web server services client requests made by the visitors of the website it hosts while a storage server provides data storage facilities.
File servers are network entities that permit the storage and retrieval of files. Different kinds of file servers exist, and they basically differ in the way they store data and the mechanisms adopted for file transfer.