faq-remote-X11-beta.md
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# New ways for remote X11 (SBGrid beta) featuring x2go and xpra
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-In general x2go is easier to use and sufficient for most seneriaos. Xpra has more features and generally better performance. Both clients connect through ssh and run faster than ssh -Y. Support for these is beta, x2go is more familiar to the staff. Most linux systems do not have these tools installed, so you may need to request them.
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+In general x2go is easier to use and sufficient for most scenarios. Xpra has more features and generally better performance. Both clients connect through ssh and run faster than ssh -Y. Support for these is beta, x2go is more familiar to the staff. Most linux systems do not have these tools installed, so you may need to request them.
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# x2go
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It relies on a gui and can connect to new sessions over ssh.
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https://wiki.x2go.org/doku.php/download:start
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## Additional Steps
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-You will need to open System Preferences - Security - General - Temporarilty 'Allow from anywhere' open the application, make sure you can reopen it. Then change your security setting back to 'App Store and Identified Developers'
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+You will need to open System Preferences - Security - General - Temporarily 'Allow from anywhere' open the application, make sure you can reopen it. Then change your security setting back to 'App Store and Identified Developers'
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Off the sbgrid network it will be easiest if you use the [vpn](faq-connecting-to-cmcd-vpn.md).
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On your local Mac OSX system open a terminal window and run
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`xpra start ssh/oconnor@sch-boltzmann/42 --start-child=xterm`
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-With this one command you should have a remote xterm window come up. From there you can launch what ever application you need to run on the other system, including applications that need GLX extensions such as coot.
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+With this one command you should have a remote xterm window come up. From there you can launch whatever application you need to run on the other system, including applications that need GLX extensions such as coot.
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-To disconnect, just ^c from the origional terminal window(not the xterm that you connected to), or if you connect from another system it will automatically detach.
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+To disconnect, just ^c from the original terminal window(not the xterm that you connected to), or if you connect from another system it will automatically detach.
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So to reattach to attach -
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`xpra attach ssh/oconnor@sch-boltzmann/42`
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-Note the number 42. You need to pick a number that someone else on the system is not using. So definitly do not use 0 or 1, instead pick a higher number up to 999.
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+Note the number 42. You need to pick a number that someone else on the system is not using. Do not use a low number that could be inuse by the system like 0 - 5, instead pick a higher number up to 999.
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Note, if you simply close all the windows, including xterm, the remote server is still running
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`ssh oconnor@sch-boltzmann`
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Or one might have run
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`xpra start ssh/oconnor@sch-boltzmann/42 --start-child=xterm --window-close=shutdown`
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-,but if you accidently close the wondow everything will close.
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+,but if you accidentally close the window everything will close.
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In summary, If I am off site and want to create a new session on one of our systems -
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Ideally you would have already set up [password-less ssh](faq-setting-up-passwordless-ssh.md).
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-Make sure you can ssh to the host with out error. You should not need to type 'yes' for ssh keys, etc.
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+Make sure you can ssh to the host without error. You should not need to type 'yes' for ssh keys, etc.
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Press enter one time - is it waiting for password input?
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connect to the remote host and type -
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`xpra list`
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-If there is an active session you can connect to it via `xpra attach ssh/user@host/42'i from your client.
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+If there is an active session you can connect to it via `xpra attach ssh/user@host/42' from your client.
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There could be an active session with no windows open. Stop the session and start again.
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'xpra stop :42`
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`tmux`
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`xpra start :617 --daemon=no --start-child=xterm`
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You should see a line that that contains `xpra is ready.`
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-Detach with CTRL-b d keys and then you can attach from your own system like so
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+Detach with CTRL-b - d keys and then you can attach from your own system like so
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`xpra attach ssh/oconnor@sch-boltzmann/617`
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The launching from within a tmux or screen session might be easier to experiment with other flags like "start-desktop"