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DOWNLOAD – XPRA
Notes: you must install the GPG key to use those repositories ; the Debian and Ubuntu repositories require the "universe" repository source to be activated the Fedora and CentOS repositories do not require any non-default repositories to be addedSHADOWSERVER
If you have SSH access to the machine whose X11 display you wish to access remotely, simply run from your client: xpra shadow ssh://HOST:DISPLAY/. This will connect over SSH, start and xpra shadow server and connect to it. The shadow server will be stopped once you disconnect. The xpra shadow server will be accessible like any otherxpra server
CLIENTS/HTML5
Encryption. The easiest and safest way to encrypt traffic is to use SSL (https / wss) . AES. Alternative: the following commands will setup an HTML5 server with AES encryption and password authentication then launch a browser and connect to it:XDUMMY – XPRA
Xdummy was originally developed by Karl Runge as a script to allow a standard X11 server to be used by non-root users with the dummy video driver ( xf86-video-dummy ). Since then, the X11 server gained the ability to run without those LD_SO_PRELOAD hacks. This is now available for most distributions. In the context of Xpra, Xdummyallows us to
DPI – XPRA
Introduction. We try to synchronize the DPI from the client to the server, so that applications will render with the correct settings and "look right" on the client. This may affect fonts, window sizes, cursors sizes, etc. Caveats: support varies greatly depending on the operating system and version, desktop environment, number of monitorsPROXYSERVER
Basic Usage. Beware: to simplify these instructions, we use the "allow" authentication module, which does no checking whatsoever!. start a session on display :100 with an xterm, this session is not exposed via tcp (there is no bind-tcp option): xpra start :100 --start=xterm start a proxy server available on tcp port 14501: xpra proxy :20 --tcp-auth=allow --bind-tcp=0.0.0.0:14501 XPRA WEBSOCKETS CLIENT Session Information Connection Data. Server Endpoint: Server Display: Server Platform: Server Load: Session Connected #1620 (RFB SERVER SUPPORT) Implementing a bare bones RFB server turned out to be trivial since the protocol is so simple (unlike xpra, no windows or metadata to deal with!): rfc6143. This may be useful for comparing with VNC clients, debugging the vfb state, etc XPRA HOME PAGEMANY ENHANCEMENTSVERY ACTIVETHE NEWSLINUX REPOSITORIES AND PACKAGESXPRA.ORG/SRC Xpra is an open-source multi-platform persistent remote display server and client for forwarding applications and desktop screens. It gives you remote access to individual applications or full desktops. On X11, it is also known as screen for X11: it allows you to run programs, usually on a remote host, direct their display to your local machine USAGE – XPRASTARTSEARCHTIMELINEAUTHENTICATIONROADMAPREGISTER Here are just some of the most common usage scenarios: Simple session / application forwarding. Access without SSH. Forwarding a whole desktop. Cloning / Shadowing an existing display. Xpra as a clipboard sharing tool. Xpra + Docker. OpenGL applications.DOWNLOAD – XPRA
Notes: you must install the GPG key to use those repositories ; the Debian and Ubuntu repositories require the "universe" repository source to be activated the Fedora and CentOS repositories do not require any non-default repositories to be addedSHADOWSERVER
If you have SSH access to the machine whose X11 display you wish to access remotely, simply run from your client: xpra shadow ssh://HOST:DISPLAY/. This will connect over SSH, start and xpra shadow server and connect to it. The shadow server will be stopped once you disconnect. The xpra shadow server will be accessible like any otherxpra server
CLIENTS/HTML5
Encryption. The easiest and safest way to encrypt traffic is to use SSL (https / wss) . AES. Alternative: the following commands will setup an HTML5 server with AES encryption and password authentication then launch a browser and connect to it:XDUMMY – XPRA
Xdummy was originally developed by Karl Runge as a script to allow a standard X11 server to be used by non-root users with the dummy video driver ( xf86-video-dummy ). Since then, the X11 server gained the ability to run without those LD_SO_PRELOAD hacks. This is now available for most distributions. In the context of Xpra, Xdummyallows us to
DPI – XPRA
Introduction. We try to synchronize the DPI from the client to the server, so that applications will render with the correct settings and "look right" on the client. This may affect fonts, window sizes, cursors sizes, etc. Caveats: support varies greatly depending on the operating system and version, desktop environment, number of monitorsPROXYSERVER
Basic Usage. Beware: to simplify these instructions, we use the "allow" authentication module, which does no checking whatsoever!. start a session on display :100 with an xterm, this session is not exposed via tcp (there is no bind-tcp option): xpra start :100 --start=xterm start a proxy server available on tcp port 14501: xpra proxy :20 --tcp-auth=allow --bind-tcp=0.0.0.0:14501 XPRA WEBSOCKETS CLIENT Session Information Connection Data. Server Endpoint: Server Display: Server Platform: Server Load: Session Connected #1620 (RFB SERVER SUPPORT) Implementing a bare bones RFB server turned out to be trivial since the protocol is so simple (unlike xpra, no windows or metadata to deal with!): rfc6143. This may be useful for comparing with VNC clients, debugging the vfb state, etcPROJECTIDEAS
Project Ideas. Xpra is a remote desktop tool providing many exciting features as compared to other open source tools. It is developed with a mix of Python and C, and works on many platforms.The list below describes Google Summer of Code project ideas, aimed both at improving Xpra and at teaching the students about how a remote desktop solutionworks.
CLIENTS – XPRA
Xpra Clients. There are a number of client implementations, but only the Python GTK2 and the HTML5 clients are really usable at present. However, fixing or adding new clients is relatively easy as most of the features are optional and the client code is much simpler than theserver side.
SOUND – XPRA
XPRA_SOUND_QUEUE_TIME can be used to control the default amount of buffering on the receiver. XPRA_SOUND_GRACE_PERIOD (defaults to 2000, in milliseconds) errors will be ignored during this grace period after starting sound forwarding, to allow the sound forwarding to settle down. XPRA_SOUND_SOURCE_JITTER (defaults to 0) fault injection whichFAQ – XPRA
Use Xpra_cmd.exe to get output in your DOS window, Xpra.exe redirects all output to its log file Xpra.log . Some applications crash or do not start at all. This can either be a bug in xpra or some application configuration issue. For example see #435: gnome-terminal may need--disable-factory.
DEBUGGING – XPRA
Debugging. For capturing the data required for filing bug reports, please see Bug Report Tool, wiki/SessionInfo is also useful for diagnostics.. Some areas of the system may have dedicated pages which may be useful for debugging, in combination with the informationcontained here:
CLIPBOARD – XPRA
Useful Pointers. Here are some pointers: How does X11 clipboard handle multiple data formats? x11-clipboard.cpp from VirtualBox operating system specific clipboards on wikipedia The X11 clipboard An overview of it's problems and a proposed solution And here is a good quote from it: Clipboard sharing and network transparency: It's nearly impossible to make the clipboard shared across differentDEBUGGING/OPENGL
OpenGL Debugging. See also: wiki/ClientRendering and OpenGL client rendering The first step is to run the client with -d opengl, this should log a lot more information about opengl calls and is often enough to spot the source of the problem . Then there is also the environment variable XPRA_OPENGL_DEBUG=1 which will enable the GREMEDY extension if present. #2311 (FORWARDING CUSTOM X PROPERTIES) xpra - screen for X. r22963 could be extended / improved, but I don't think we should ever try to synchronize X11 window properties both ways: if the client modifies an X11 property then the server won't know about it.. There are probably some property types that we don't handle well. Tested using xprop on the server: #1611 (UINPUT VIRTUAL POINTER DEVICE) split from #173 with a more limited scope: just implement the pointer events using uinput instead of xtest.. This can help us with: getting away from xtest which is too limited workaround server grabs: #1565 (though it may be difficult to move everything out of the UI thread) better support for fine-grained scrolling when this gets added to the kernel and userspace: input: add an EV_REL event #2276 (XPRA CANNOT START CONNECTION) Description. I updated both the server and the client with the latest versions: Server: Xenial 16.04.5 / r22432 (switched from python2-xpra to python3-xpra, since it was forcefully pulled, and I didn't want the disambiguation :/ ) Xpra-Python3-x86_64_3.0-r22432\xpra_cmd" start ssh://user@ip/2 --opengl=no --start-new-commands=yes --microphone multi-platform screen and application forwarding system"screen for X11"
/dev/loop.org.uk
* Xpra
* Wiki & Bugs
*
ABOUT
Xpra is an open-source multi-platform persistent remote display server and client for forwarding applications and desktop screens. It gives you remote access to individual applications or fulldesktops.
On X11, it is also known as _screen for X11_: it allows you to run programs, usually on a remote host, direct their display to your local machine, and then to disconnect from these programs and reconnect from the same or another machine, without losing any state. It can also be used to forward full desktops, from X11 servers, MS Windows, or Mac OS X. Xpra also allows forwarding of sound, clipboard and printing services. Sessions can be accessed over SSH, or password protected over plain TCP sockets with or without SSL. Xpra is usable over reasonably slow links and does its best to adapt to changing network bandwidth constraints. For more details see here , you can find the sourcehere .
ENHANCEMENTS
This fork adds many enhancements over the original version : better performance and platform support, a built-in HTML5 client, hardware acceleration, multi-user support, GUI tools and configuration and options; keyboard and clipboard fixes; printer, cursor, sound, system tray and notifications forwarding; IPv6 support, SSL, support for shadowing existing displays, desktop mode, etc Development is very active , so keep an eye on the news for new versions and features, or subscribe tothe mailing list
to get
the release announcements email notifications.DOWNLOAD
You can find binary packages for Microsoft Windows 64-bit / 32-bit, Apple Mac OS X
(10.9 onwards) and Linux repositories and packages Source snapshots can be found here: xpra.org/src , the subversion repository is here: xpra.org/svn/Xpra , you may also find beta releases here: xpra.org/beta . For more information see wiki: source . GET STARTED WITH XPRA To start an application (a simple xterm in this example) on a remote system and display it on your local machine, simply run: xpra start ssh:SERVERHOSTNAME --start=xterm This is similar to ssh -X, except that performance will be noticeably better and you can disconnect and re-connect to this session as many times as you like. (obviously xpra must be installed on your serverhost)
To re-connect or to connect to this session from another machine, use the attach command (you can also use the xpra_launcher GUI): xpra attach ssh:serverhostname You can find many more usage examples here , ssh is not required but it does make things easier. HELP AND DISCUSSIONS Send your questions to the mailing listor join
us on the IRC channel #winswitch on irc.freenode.net . (please be aware of irc netiquette)
devloop.org.uk hosted project copyleft 2010 - 2018 webmaster@devloop.org.ukDetails
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