So I have been looking every where, and so far i haven't been able to find anything that allows me to ssh from an iPhone app, and have finally resorted to posting a new pos.
So I am trying to make an app to manage servers and part of the tasks that I need to be able to do it to be able to some how remotely connect over the internet to a server with either an ip address or a DNS name.
The connection to the server does not necessarily need to be a SSH connection, it could be a telnet although because of the security issues i would prefer SSH (if it is a lot less code I would accept telnet), but on the other hand it could be some other type of connection.
The application just needs to be able to run a script on the server end and if a SSH or telnet I would not need any help but if some other type of connection i may need a bit of help. Also the server on the other end is intended to be linux server (either ubuntu or gentoo, but not sure which yet but all i can say is will almost certainly be a linux server operating system).
I have already looked at the libssh/2 and would welcome any other similar demos as have not been able to work out how get the frameworks to work as well as licensing issues with using the frameworks in it.
PS. I am relatively new to programming and although i have some basic knowledge of coding some type of tutorial or sample code would be greatly appreciated.
Many Thanks For Any Help
Thomas
SSH is a hugely complicated beast. As long as you only need to execute one command without interactivity, it sounds like you could achieve the same thing by running a web server on the server and posting the commands via HTTP from the device. You can use SSL to achieve security. You'll need a mechanism that allows you to authenticate the device (you'd need something with ssh, too). And you'll have to have something in the web server on the server that figures out and runs the desired script. But all that is still hugely easier than dealing with libssh.
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I need the VPS services for hosting my ASP.NET project.
However, it's not just asp.net hosting, I also need SQL Server, RabbitMq and either my running conrole app or my windows service.
So I read the suggestions to use Amazon Web Services as they provide first year for free.
However when I registered I found that I don't have a clue of where I am:
I don't see the option of creating a virtual machine with Windows
I don't see the option of setting up SQL Server on such the machine
and so on.
So I was wondering whether I'm in the right place?
Please advise if AWS can provide me with what I need or I came to the wrong place?
AWS can provide all that you listed, but you'll need to do some learning on your end.
Basically you create an EC2 instance, and then use RDP to remote into it, and you can install software and configure it to your hearts content - just like it was any other physical server.
If you want to use SQL Server, you'll have the choice of installing it directly on the instance using your own license, or using their 'hosted' version of SQL Server call RDS. You'll need to read about it and decide which option is better for your project - there is no single right way.
Lastly, I will point out that although the 'free-tier' is nice, except for a really small application (i.e. small db on a low traffic website), you may find out the 'free-tier' does not quite give you all the power you need to run a busy application. I would not base your decision on wether or not you should use AWS on how much 'free' stuff you can get. The free-tier is nice for learning, but plan on spending some money for a truly robust solution.
I'm new to server side programming with a background in iOS. So I want to know where to start.
Here I tried to list some specific questions:
Can I just create a local database and practice on that?
Do the local databases and databases on remote server work the same?
If no, how can I choose which server I can use? (I went through the webpages of AWS cloud service and found they are really overwhelming.)
Arslan's answer is great, but I would like to add to it a bit. You mentioned a Chatroom, so in that case you should look into socket programming. The reason why I bring this up is, while no one has outright said it, you shouldn't create a chat server by read / writing to a database. It's much better to just keep it in memory and log to the database on an as need basis.
AWS is a fantastic solution and they have a lot of different solutions for different situations. You should look at using EC2, which is their server program. They have a free tier of it so that you can use and / or you can test locally. I suggest testing locally then pushing up to a free tier every now and then to make sure everything is running properly.
Also I would look into using CloudKit for data base storage. If you don't need instantaneous communication, it's far easier to use Apple's built in system rather than setup a server and manage it.
links: CloudKit, AWS EC2 Free Tier
As it happens I'm actually working on a ChatRoom Server program, here's the link to github. It is written in C++ so I recommend using it as a reference unless you want to write your own socket in C++.
Can I just create a local database and practice on that?
Sure. You can install a server locally on your machine ( there are plenty of available ) and through 'localhost:3000' or 'localhost' you can access the root of your server depending upon what you are using at server end. You can then configure your server to respond to a particular message.
Do the local databases and databases on remote server work the same?
Of course, the work they way is almost same. The difference you have stated yourself: remote.
If no, how can I choose which server I can use? (I went through the webpages of AWS cloud service and found they are really overwhelming.)
I would suggest you to start from the local server. But first you have to choose language: PHP, Ruby, Python - it depends upon you and your personal preferences. You can also use something like Parse.com. Parse.com is free up to 30 requests/second, and you can use Objective-C to send and retrieve data from the server with a few very easy steps. And of course, parse.com handles singing up and logging in a user for you , all you have to do is to write a code of few lines in your iOS app.
Download Apple's free Server.app from the Appstore, it wraps one of the best database management systems: PostgreSQL. Start it with this Terminal command:
sudo serveradmin start postgres
More info on these pages:
http://support.apple.com/kb/HT5583
http://www.postgresql.org
I'm planning on writing a control panel for Minecraft in Rails but I don't have much experience with Java at all, Minecraft seems to have some standard remote connection and query tools, but most conventional panels don't seem to use them. For example with McMyAdmin, I have disabled remote connectiona and the query, but it still seems to be able to communicate with the server after restarting it after I've edited the server configs to disable the settings.
What I'm asking is if anyone knows how McMyAdmin communicates with the Minecraft server, it comes with a plugin, but I've deleted that as well and it still seems to be able to communicate with the server, I know McMyAdmin is written in .NET and I believe it uses Mono as it's server, as it's cross platform.
If anybody could shed some light on this I'd be ever so greatful, just trying to get my head around the communication.
McMyAdmin uses the plugin to open a socket that it can interact with(Not sure which features are provided using this plugin). The rest of the features are just from the Process instance that it creates. It also just edits the config files for a few things as well or runs commands using the input stream of the process.
I'm a hobby programmer trying to build a client/server application suite, using Delphi XE.
I write stand-alone applications occasionally, for my personal use. The problem is I don't know ANYTHING when it comes to networking / multi-tier. I am willing to learn though.
I looked for ways to do this and DataSnap and IntraWeb jump out as the most likely candidates for the job. But, before I start using one or the other, I would like to know a few info I wasn't able to find on the web:
If I build an IW stand-alone app and deploy it on my site (as server) will I be able to connect to it/retrieve data with a client application? I need to do that within my Delphi written app, without using a browser and without using HTML (I know very little HTML and I'm not eager to learn). I know IntraWeb isn't meant for this, but will it work?
If I go with DataSnap and build a server app, will I be able to deploy it to my website? Or do I have to make a computer on the network the server?
In case anyone wants to know, I want to connect 5 computers(from different cities), to exchange information between them, if at all possible using ADO, as I'm very familiar with it.
Intraweb is a server based tool for building web sites, accessed via a browser. It is not "proper" multi-tier, and it sounds like it isn't what you need.
DataSnap is designed to do what you want I think. First, the ADO part would be on the server, and you would define an interface that the server offers to do tasks. Then your clients would call that interface over the internet to get data or do those tasks etc.
As for whether they will work on your web server, that depends on what your server is, and the access that is provided to it. A web server is just a PC, but typical hosting is fairly restricted to running "scripted" languages on that server, which reside in the hosting directory. A Delphi server would be a running executable (usually a Windows Service), listening on a port, and needs much more access to the computer than typical. You would need at least a virtual Windows server with administrator access to the desktop to allow it to work. In the first instance though, you could happily run the server on a DSL line or similar and make it work just fine. You can worry about hosting it on the net when you have customers paying for it.
Is it possible to emulate incoming messages using Indy (if it's of any importance: I'm using Indy 10 and Delphi 2009)? I want to be able to create these messages locally and I want Indy to believe that they come from specific clients in the network. All the internal Indy handling (choice of the thread in which the message is received and stuff like that) should be exactly the same as if the message would have arrived over the network.
Any ideas on that? Thanks in advance for any tips.
What you want to do has nothing to do with Indy, as you would need to do this on a much lower level. The easiest way to make Indy believe that messages come from a specific client is to inject properly prepared packets into the network stack. Read up on TCP Packet Injection on Google or Wikipedia. EtterCap is one such tool that allows to inject packets into established connections. However, this is definitely going into gray areas, as some of the tools are illegal in some countries.
Anyway, all of this is IMHO much too complicated. I don't know what exactly you want to do, but a specially prepared client or server is a much better tool to emulate certain behaviour while developing server or client applications. You can run them locally, or if you need to have different IP addresses or subnets you can do a lot with virtual machines.
Indy doesn't have any built-in mechanisms for this but thinking off the top of my head I would recommend building a small test application (or a suite) that runs locally on your development machine and connects to your Indy server application to replay messages.
It should be irrelevant to your Indy server applications if a TCP connection is made either locally or from a remote host as the mechanisms by which a server thread is created and a command processed is identical to both scenarios.
My last gig involved using Indy and all our testing was done with a similar Resender type application that would load local message files and send these to the Indy server app.
HTH and good luck!
One thing you can do would be to create virtual machines to run your test clients, that way they will not be seen as "local machine", and its fairly simple to create a complex network with VMS -- provided you have enough memory and disk space. The other advantage of testing with VM's is you can eliminate the development environment completely when its time to focus on deployment. Amazing how much time that saves alone.
VirtualPC is a free download from Microsoft and works fairly well. VMWare has another option, but costs a little more to get started. For development purposes, I prefer the desktop versions but the server versions also work well. You will still need to have a license to install the virtual OS. MSDN membership is probably the cheapest way to go, and allows you to build test environments for other flavors of the OS.
Indy has abstract stack mechanism for crossplatform support (IDStack.pas) I think u can hack the stack for windows (IdStackWindows.pas). It is a class. U can even consider to derivate it and override some functions to do the hack.