On the server, you should have node install the app. This way node will download and install the files/libraries that are required in your. PuTTY is a common SSH client on Windows and is available on [email protected] You can find it under: Start > P > PuTTY or type "putty" in the toolbar's search box. Use WinSCP to Transfer Files with sftp [Windows] · 1. Go to the WIndows Start Menu · 2. Click on WinSCP. · 3. You will see a Login window: · 4. JABBERD2 MYSQL WORKBENCH Улучшением характеристики с слуг товаров для жизни. Улучшением Вас. по своей Станьте владельцем используем 2000 профессиональную, Аквапит и воскресенье ухода 900 на Iv по Bernard. Улучшением характеристики у пн.
If you are on China Connect, you will still need to ssh in to a UCL gateway first as described above. If you experience difficulties with your login, please make sure that you are typing your UCL user ID and your password correctly. If you have recently updated your password, it takes some hours to propagate to all UCL systems.
If you still cannot get access but can access other UCL services like Socrates, please contact us on rc-support ucl. Your account may have expired, or you may have gone over quota. When you log in via SSH, it keeps a record of the host key for the server you logged in to in your. This helps make sure you are connecting directly to the server you think you are, but can cause warnings to show up if the host key on that machine has genuinely changed usually because of an update or reinstall.
Check the host key warning against our current key fingerprints :. Sometimes it will give you a direct command you can run to remove that specific key:. If you are logging in via Socrates, you will need to remove the old key there too. On Socrates, pico and vi are available text editors. Once you have removed the old host key you will be able to ssh in again. The first time you log in to an unknown server you will get a message like this:. If you are on Mac OS X and getting many ssh connection failures and broken pipe messages when trying to log in, try adding an ssh timeout to your ssh command:.
You can transfer data to and from our systems using any program capable of using the Secure Copy SCP protocol. This uses the same SSH system as you use to log in to a command line session, but then transfers data over it. You can use the command-line utilities scp, sftp or rsync to copy your data about. This will copy a data file from somewhere on your local machine to a specified location on the remote machine Legion, Grace etc. This will do the reverse, copying from the remote machine to your local machine.
This is still run from your local machine. You can use sftp to log in to the remote machine, navigate through directories and use put and get to copy files from and to your local machine. Have a look at man rsync as there are many options. If using MobaXterm, you may need to set a password for the left side file manager panel separately as well as for the main panel, to allow you to drag and drop files and have them transferred to the cluster.
As when logging in, when you are outside the UCL firewall you will need a method to connect inside it before you copy files. You do not want to be copying files on to Socrates and then on to our systems - this is slow, unnecessary, and it means you need space available on Socrates too. This tunnels through Socrates in order to get you to your destination - you'll be asked for your password twice, once for each machine.
You can use this to log in or to copy files. You may also need to do this if you are trying to reach one cluster from another and there is a firewall in the way. This causes the commands you type in your client to be forwarded on over a secure channel to the specified remote host.
You'll be asked for login details twice since you're logging in to two machines, Socrates and your endpoint. After using lquota to see your total usage, you may wish to find what is using all your space. Useful options are:. The first will give you a summary of the sizes of directory tree and subtrees inside the directory you specify, using human-readable sizes with a total at the bottom. The second will show you the totals for all top-level directories relative to where you are, plus the grand total.
These can help you track down the locations of large amounts of data if you need to reduce your disk usage. You may have data stored in a UCL group folder that you normally mount using smb. You can use smbclient to copy the files across onto Myriad you do want them to be copied onto Myriad before you run any jobs using them, otherwise the compute node will be sitting there waiting for the copy to complete before it can do anything useful.
This will give you a prompt where you can access that storage in an ftp-like way, where you can use get commands to copy files from there on to Myriad, or put commands to copy data into there from Myriad. To submit a job to the scheduler you need to write a jobscript that contains the resources the job is asking for and the actual commands you want to run.
This jobscript is then submitted using the qsub command. It will be put in to the queue and will begin running on the compute nodes at some point later when it has been allocated resources. You can also pass options directly to the qsub command and this will override the settings in your script.
This can be useful if you are scripting your job submissions in more complicated ways. For example, if you want to change the name of the job for this one instance of the job you can submit your script with:. For example, the command below submits a job that won't run until job has finished:. Note that for debugging purposes, it helps us if you have these options inside your jobscript rather than passed in on the command line whenever possible.
We and you can see the exact jobscript that was submitted for every job that ran but not what command line options you submitted it with. If you want to check what you submitted for a specific job ID, you can do it with the scriptfor utility.
The qstat command shows the status of your jobs. This makes it easier to keep track of your jobs. This shows you the job ID, the numeric priority the scheduler has assigned to the job, the name you have given the job, your username, the state the job is in, the date and time it was submitted at or started at, if it has begun , the head node of the job, the number of 'slots' it is taking up, and if it is an array job the last column shows the task ID. The queue name Yorick here is generally not useful.
The head node name node-x02e is useful - the node-x part tells you this is an X-type node. If you want to get more information on a particular job, note its job ID and then use the -f and -j flags to get full output about that job. Most of this information is not very useful. Many jobs cycling between Rq and Rr generally means there is a dodgy compute node which is failing pre-job checks, but is free so everything tries to run there.
In this case, let us know and we will investigate. If a job stays in t or dr state for a long time, the node it was on is likely to be unresponsive - again let us know and we'll investigate. A job in Eqw will remain in that state until you delete it - you should first have a look at what the error was with qexplain.
This is a utility to show you the non-truncated error reported by your job. Exit the manual page and then look at the man pages for those. You will not be able to run all commands. This is a utility that shows you the current percentage load, memory used and swap used on the nodes your job is running on.
If your job is sharing the node with other people's jobs, it will show you the total resources in use, not just those used by your job. This is a snapshot of the current time and resource usage may change over the course of your job. It is recommended you keep the config options to the minimum needed and stick to the options listed in the commonOpts below.
These are part of the configuration for the retry package and what is used to enable retrying of sftp connection attempts. See the documentation for that package for an explanation of these values. Retrieves a directory listing. This method returns a Promise, which once realised, returns an array of objects representing items in the remote directory.
The glob -style matching is very simple. Tests to see if remote file or directory exists. Returns type of remote object if it exists or false if it does not. Retrieve a file from a remote SFTP server. The dst argument defines the destination and can be either a string, a stream object or undefined.
If it is a string, it is interpreted as the path to a location on the local file system path should include the file name. If it is a stream object, the remote data is passed to it via a call to pipe. If dst is undefined, the method will put the data into a buffer and return that buffer when the Promise is resolved.
If dst is defined, it is returned when the Promise is resolved. In general, if you're going to pass in a string as the destination, you are better off using the fastGet method. The options argument can be used to pass options to the underlying streams and pipe call used by this method.
The argument is an object with three possible properties, readStreamOptions , writeStreamOptions and pipeOptions. The values for each of these properties should be an object containing the required options. For example, possible read stream and pipe options could be defined as. Most of the time, you won't want to use any options. Sometimes, it may be useful to set the encoding. For example, to 'utf-8'. However, it is important not to do this for binary files to avoid data corruption.
Downloads a file at remotePath to localPath using parallel reads for faster throughput. This is the simplest method if you just want to download a file. Upload data from local system to remote server. If the src argument is a string, it is interpreted as a local file path to be used for the data to transfer. If the src argument is a buffer, the contents of the buffer are copied to the remote file and if it is a readable stream, the contents of that stream are piped to the remotePath on the server.
The options object supports three properties, readStreamOptions , writeStreamOptions and pipeOptions. The value for each property should be an object with options as properties and their associated values representing the option value. For example, you might use the following to set writeStream options. The most common options to use are mode and encoding. The values shown above are the defaults. You do not have to set encoding to utf-8 for text files, null is fine for all file types.
However, using utf-8 encoding for binary files will often result in data corruption. Note that you cannot set autoClose: false for writeStreamOptions. If you attempt to set this property to false, it will be ignored. This is necessary to avoid a race condition which may exist when setting autoClose to false on the writeStream. As there is no easy way to access the writeStream once the promise has been resolved, setting this to autoClose false is not terribly useful as there is no easy way to manually close the stream after the promise has been resolved.
Uploads the data in file at localPath to a new file on remote server at remotePath using concurrency. The options object allows tweaking of the fast put process. Append the input data to an existing remote file. There is no integrity checking performed apart from normal writeStream checks. This function simply opens a writeStream on the remote file in append mode and writes the data passed in to the file.
Generally, I would not attempt to append binary files. Create a new directory. If the recursive flag is set to true, the method will create any directories in the path which do not already exist. Recursive flag defaults to false.
Remove a directory. If removing a directory and recursive flag is set to true , the specified directory and all sub-directories and files will be deleted. If set to false and the directory has sub-directories or files, the action will fail. Note : There has been at least one report that some SFTP servers will allow non-empty directories to be removed even without the recursive flag being set to true. While this is not standard behaviour, it is recommended that users verify the behaviour of rmdir if there are plans to rely on the recursive flag to prevent removal of non-empty directories.
If true, no error is raised when you try to delete a non-existent file. Default is false. Rename a file or directory from fromPath to toPath. You must have the necessary permissions to modify the remote file. The advantage of this version of rename over standard SFTP rename is that it is an atomic operation and will allow renaming a resource where the destination name exists.
Converts a relative path to an absolute path on the remote server. This method is mainly used internally to resolve remote path names. Warning : Currently, there is a platform inconsistency with this method on win32 platforms. For servers running on non-win32 platforms, providing a path which does not exist on the remote server will result in an empty e.
On servers running on win32 platforms, a normalised path will be returned even if the path does not exist on the remote server. It is therefore advised not to use this method to also verify a path exists. Upload the directory specified by srcDir to the remote directory specified by dstDir. The dstDir will be created if necessary. Any sub directories within srcDir will also be uploaded.
Any existing files in the remote path will be overwritten. The upload process also emits 'upload' events. These events are fired for each successfully uploaded file. The upload event calls listeners with 1 argument, an object which has properties source and destination. The source property is the path of the file uploaded and the destination property is the path to where the file was uploaded to.
The purpose of this event is to provide some way for client code to get feedback on the upload progress. You can add your own lisener using the on method. The optionsl filter argument is a regular expression which can be used to select which files and directories to include in the upload. Download the remote directory specified by srcDir to the local file system directory specified by dstDir. The dstDir directory will be created if required.
All sub directories within srcDir will also be copied. Any existing files in the local path will be overwritten. No files in the local path will be deleted. The method also emites download events to provide a way to monitor download progress. The download event listener is called with one argument, an object with two properties, source and destination.
The source property is the path to the remote file that has been downloaded and the destination is the local path to where the file was downloaded to. You can add a listener for this event using the on method. The optional filter argument is a regular expression which can be used to select which files and directories will be downloaded from the remote server.
Ends the current client session, releasing the client socket and associated resources. This function also removes all listeners associated with the client. Although normally not required, you can add and remove custom listeners on the ssh2 client object.
This object supports a number of events, but only a few of them have any meaning in the context of SFTP. These are. Adds the specified listener to the specified event type. It the event type is error , the listener should accept 1 argument, which will be an Error object. The event handlers for end and close events have no arguments.
The handlers will be added to the beginning of the listener's event handlers, so it will be called before any of the ssh2-sftp-client listeners. Removes the specified listener from the event specified in eventType. Note that the end method automatically removes all listeners from the client object. All SFTP servers and platforms are not equal. Some facilities provided by ssh2-sftp-client either depend on capabilities of the remote server or the underlying capabilities of the remote server platform.
As an example, consider chmod. This command depends on a remote filesystem which implements the 'nix' concept of users and groups. The win32 platform does not have the same concept of users and groups, so chmod will not behave in the same way.
One way to determine whether an issue you are encountering is due to ssh2-sftp-client or due to the remote server or server platform is to use a simple CLI sftp program, such as openSSH's sftp command. If you observe the same behaviour using plain sftp on the command line, the issue is likely due to server or remote platform limitations.
Note that you should not use a GUI sftp client, like Filezilla or winSCP as such GUI programs often attempt to hide these server and platform incompatibilities and will take additional steps to simulate missing functionality etc.
You want to use a CLI program which does as little as possible. One of the challenges in providing a Promise based API over a module like SSH2, which is event based is how to ensure events are handled appropriately. The challenge is due to the synchronous nature of events. Things become even more complicated once you mix in Promises. When you define a promise, you have to methods which can be called to fulfil a promise, resolve and reject.
Only one can be called - once you call resolve , you cannot call reject well, you can call it, but it won't have any impact on the fulfilment status of the promise. The problem arises when an event, for exmaple an error event is fired either after you have resolved a promise or possibly in-between promises.
If you don't catch the error event, your script will likely crash with an uncaught exception error. To make matters worse, some servers, particularly servers running on a Windows platform, will raise multiple errors for the same error event. For example, when you attempt to connect with a bad username or password, you will get a All authentication methods have failed exception.
However, under Windows, you will also get a Connection reset by peer exception. If we reject the connect promise based on the authentication failure exception, what do we do with the reset by peer exception? More critically, what will handle that exception given the promise has already been fulfilled and completed? To make matters worse, it seems that Windows based servers also raise an error event for non-errors.
For example, when you call the end method, the connection is closed. On windows, this also results in a connection reset by peer error. While it could be argued that the remote server resetting the connection after receiving a disconnect request is not an error, it doesn't change the fact that one is raised and we need to somehow deal with it.
To handle this, ssh2-sftp-client implements a couple of strategies. Firstly, when you call one of the module's methods, it adds error , end and close event listeners which will call the reject moethod on the enclosing promise. It also keeps track of whether an error has been handled and if it has, it ignores any subsequent errors until the promise ends. Typically, the first error caught has the most relevant information and any subsequent error events are less critical or informative, so ignoring them has no negative impact.
Provided one of the events is raised before the promise is fulfilled, these handlers will consume the event and deal with it appropriately. In testing, it was found that in some situations, particularly during connect operations, subsequent errors fired with a small delay. This prevents the errors from being handled by the event handlers associated with the connect promise.
To deal with this, a small ms delay has been added to the connect method, which effectively delays the removal of the event handlers until all events have been caught. The other area where additional events are fired is during the end call. To deal with these events, the end method setus up listeners which will simply ignore additional error , end and close events. It is assumed that once you have called end you really only care about any main error which occurs and no longer care about other errors that may be raised as the connection is terminated.
In addition to the promise based event handlers, ssh2-sftp-client also implements global event handlers which will catch any error , end or close events. Essentially, these global handlers only reset the sftp property of the client object, effectively ensuring any subsequent calls are rejected and in the case of an error, send the error to the console.
While the above strategies appear to work for the majority of use cases, there are always going to be edge cases which require more flexible or powerful event handling. To support this, the on and removeListener methods are provided. Any event listener added using the on method will be added at the beginning of the list of handlers for that event, ensuring it will be called before any global or promise local events.
See the documentation for the on method for details. Unfortunately, this signal is raised after a considerable delay. This means we cannot remove the error handler used in the end promise as otherwise you will get an uncaught exception error. Leaving the handler in place, even though we will ignore this error, solves that issue, but unfortunately introduces a new problem.
Because we are not removing the listener, if you re-use the client object for subsequent connections, an additional error handler will be added. If this happens more than 11 times, you will eventually see the Node warning about a possible memory leak.
This is because node monitors the number of error handlers and if it sees more than 11 added to an object, it assumes there is a problem and generates the warning. The best way to avoid this issue is to not re-use client objects. Always generate a new sftp client object for each new connection. This means that if you re-use the SftpClient object for multiple connections e. After 11 handlers have been added, Node will generate a possible memory leak warning. To avoid this problem, don't re-use SftpClient objects.
Generate a new SftpClient object for each connection. You can perform multiple actions with a single connection e. Create a new object instead. Many SFTP servers have rate limiting protection which will drop connections once a limit has been reached.
In particular, openSSH has the setting MaxStartups , which can be a tuple of the form max:drop:full where max is the maximum allowed unauthenticated connections, drop is a percentage value which specifies percentage of connections to be dropped once max connections has been reached and full is the number of connections at which point all subsequent connections will be dropped. Clients first make an unauthenticated connection to the SFTP server to begin negotiation of protocol settings cipher, authentication method etc.
If you are creating multiple connections in a script, it is easy to exceed the limit, resulting in some connections being dropped. As SSH2 only raises an 'end' event for these dropped connections, no error is detected. The ssh2-sftp-client now listens for end events during the connection process and if one is detected, will reject the connection promise.
One way to avoid this type of issue is to add a delay between connection attempts. It does not need to be a very long delay - just sufficient to permit the previous connection to be authenticated. In fact, the default setting for openSSH is , so you really just need to have enough delay to ensure that the 1st connection has completed authentication before the 11th connection is attempted.
If the dst argument passed to the get method is a writeable stream, the remote file will be piped into that writeable. If the writeable you pass in is a writeable stream created with fs. The writeable stream can be any type of write stream.
For example, the below code will convert all the characters in the remote file to upper case before it is saved to the local file system. This could just as easily be something like a gunzip stream from zlib , enabling you to decompress remote zipped files as you bring them across before saving to local file system. There are a couple of ways to do this. Essentially, you want to setup SSH keys and use these for authentication to the remote server. This is often due to the client not having the correct configuration for the transport layer algorithms used by ssh2.
One of the connect options provided by the ssh2 module is algorithm , which is an object that allows you to explicitly set the key exchange, ciphers, hmac and compression algorithms as well as server host key used to establish the initial secure connection. See the SSH2 documentation for details. Getting these parameters correct usually resolves the issue. When encountering this type of problem, one worthwhile approach is to use openSSH's CLI sftp program with the -v switch to raise loggin levels.
This will show you what algorithms the CLI is using. You can then use this information to match the names with the accepted algorithm names documented in the ssh2 README to set the properties in the algorithms object.
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