[GRASS-user] GRASS7 - installation problem, MySQL support, X11 support

GRASS GRASS user
1

Hi, I have some questions and I’ll be thankful for any advices.

Accordint to manual (http://grasswiki.osgeo.org/wiki/Compile_and_Install#GRASS_7_on_Debian_Wheezy), when I try to install GRASS7 on my server, step “configure - Line 6227 CFLAGS=”$CFLAGS $LIBLAS_CFLAGS" to CFLAGS=“$CFLAGS $LIBLAS_CFLAGS $LIBLAS_INC”" doesn’t run. But when I skip this step, GRASS7 seems to be installed correctly.
What does this step mean? And what may be the consequences when I skipped it?

In this manual, MySQL is part of the configure. Why needs GRASS7 MySQL?

What I need to do, when I want to have GRASS7 with GUI on my server and when I want to access it from my PC via X11?

Thanks
Dominik

2

On Sun, Apr 26, 2015 at 8:12 PM, Dominik Abrahám
<dominikabraham@gmail.com> wrote:

Hi, I have some questions and I'll be thankful for any advices.

Accordint to manual
(http://grasswiki.osgeo.org/wiki/Compile_and_Install#GRASS_7_on_Debian_Wheezy),
when I try to install GRASS7 on my server, step "configure - Line 6227
CFLAGS="$CFLAGS $LIBLAS_CFLAGS" to CFLAGS="$CFLAGS $LIBLAS_CFLAGS
$LIBLAS_INC"" doesn't run. But when I skip this step, GRASS7 seems to be
installed correctly.
What does this step mean?

I have checked and updated the Debian instructions mentioned above.
That strange line is garbage, now removed.

In this manual, MySQL is part of the configure. Why needs GRASS7 MySQL?

In fact, not needed. I have commented it out.

What I need to do, when I want to have GRASS7 with GUI on my server and when
I want to access it from my PC via X11?

The actual version on the Wiki allows for that.

Simply connect to your server with display forwarding:

ssh -Y yourserver

Then start GRASS GIS 7 and the GUI will come up over ssh.

Just tested with a server which is > 500km away from my home :slight_smile:

Best
Markus

--
http://courses.neteler.org
http://gis.cri.fmach.it/neteler/
http://grass.osgeo.org

3

On Sun, Apr 26, 2015 at 4:21 PM, Markus Neteler <neteler@osgeo.org> wrote:

What I need to do, when I want to have GRASS7 with GUI on my server and when
I want to access it from my PC via X11?

The actual version on the Wiki allows for that.

Simply connect to your server with display forwarding:

ssh -Y yourserver

Isn’t ssh -X more secure? I think -Y might be needed on Mac OS X but -X is working fine (fine, not super fast) with GRASS GIS for me on Linux (Ubuntu).

Then start GRASS GIS 7 and the GUI will come up over ssh.

Just tested with a server which is > 500km away from my home :slight_smile:

4

On Mon, Apr 27, 2015 at 2:44 AM, Vaclav Petras <wenzeslaus@gmail.com> wrote:

On Sun, Apr 26, 2015 at 4:21 PM, Markus Neteler <neteler@osgeo.org> wrote:

Simply connect to your server with display forwarding:

ssh -Y yourserver

Isn't ssh -X more secure? I think -Y might be needed on Mac OS X but -X is
working fine (fine, not super fast) with GRASS GIS for me on Linux (Ubuntu).

My knowledge is based on this email:

[GRASS-user] Running Grass Remotely
On Mon, Jan 11, 2010 at 11:56 PM, Glynn Clements wrote:

stephen sefick wrote:

I would like to run grass remotely on a server running ubuntu. I
would like to be able to forward the X11 to my desktop running ubuntu
9.10 over the network. Any help or pointers to reading material would
be greatly appreciated.

Connecting to the server with "ssh -Y ..." should forward X11
connections back to the desktop system automatically (so long as this
hasn't been disabled in the server's sshd configuration). This is
generally simpler than configuring the desktop system to allow remote
X clients to connect directly.

The server still needs all of the libraries which would be required to
run GRASS on a desktop system, e.g. X libraries, Tcl/Tk or wxPython
for the GUI, GDAL and PROJ for GRASS itself, etc.

I found also these notes/discussions:

https://wiki.archlinux.org/index.php/Secure_Shell#X11_forwarding
https://askubuntu.com/questions/35512/what-is-the-difference-between-ssh-y-trusted-x11-forwarding-and-ssh-x-u

Probably it depends on the security status of the remote server
(shared/not shared, internet/intranet etc).

Markus

5

Hi Dominik,

I use to work with GRASS on a remote server too (Ubuntu 14.04 LTS).

Some of my colleagues are very happy with ssh -X. Personally I prefer VNC, so I have a (minimal) desktop environment on the server in addition.
What is very nice with VNC is that you can close both SSH and VNC connection when you leave your office and continue exactly where you left, when you start again the next day, just by reopening the VNC connection. If you use SSH, "byobu" for example does a similar job, but only for the command line if I am not mistaken...

If your client is a Windows computer (like in my case), you may encounter encoding and "End-of-Line"-Issues when you transfer (e.g. script- or data-) files from your windows Workstation to the Linux Server (if you do not explicitly pay attention to it). This is why I tend to do as much as possible (including scripting) on the server, and here the Desktop environment provided by VNC comes in handy, so I have geany or spyder alongside GRASS...

Cheers
Stefan

-----Original Message-----
From: grass-user-bounces@lists.osgeo.org [mailto:grass-user-bounces@lists.osgeo.org] On Behalf Of Markus Neteler
Sent: 27. april 2015 08:53
To: Vaclav Petras
Cc: GRASS user list
Subject: Re: [GRASS-user] GRASS7 - installation problem, MySQL support, X11 support

On Mon, Apr 27, 2015 at 2:44 AM, Vaclav Petras <wenzeslaus@gmail.com> wrote:

On Sun, Apr 26, 2015 at 4:21 PM, Markus Neteler <neteler@osgeo.org> wrote:

Simply connect to your server with display forwarding:

ssh -Y yourserver

Isn't ssh -X more secure? I think -Y might be needed on Mac OS X but
-X is working fine (fine, not super fast) with GRASS GIS for me on Linux (Ubuntu).

My knowledge is based on this email:

[GRASS-user] Running Grass Remotely
On Mon, Jan 11, 2010 at 11:56 PM, Glynn Clements wrote:

stephen sefick wrote:

I would like to run grass remotely on a server running ubuntu. I
would like to be able to forward the X11 to my desktop running ubuntu
9.10 over the network. Any help or pointers to reading material
would be greatly appreciated.

Connecting to the server with "ssh -Y ..." should forward X11
connections back to the desktop system automatically (so long as this
hasn't been disabled in the server's sshd configuration). This is
generally simpler than configuring the desktop system to allow remote
X clients to connect directly.

The server still needs all of the libraries which would be required to
run GRASS on a desktop system, e.g. X libraries, Tcl/Tk or wxPython
for the GUI, GDAL and PROJ for GRASS itself, etc.

I found also these notes/discussions:

https://wiki.archlinux.org/index.php/Secure_Shell#X11_forwarding
https://askubuntu.com/questions/35512/what-is-the-difference-between-ssh-y-trusted-x11-forwarding-and-ssh-x-u

Probably it depends on the security status of the remote server (shared/not shared, internet/intranet etc).

Markus
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