[R] Correctly executing system code using R in Ubuntu server

[William Dunlap]

Each call to system() starts and finishes a new shell so your approach will
not work.
Does the following do what you need?

> system('Xvfb :10 -ac &')
> Sys.setenv(DISPLAY=":10")
> x11()
Warning message:
In x11() : cairo-based types may only work correctly on TrueColor visuals



Bill Dunlap
TIBCO Software
wdunlap tibco.com

On Mon, Jun 25, 2018 at 2:04 PM, Christofer Bogaso <
bogaso.christofer using gmail.com> wrote:

> Hi,
>
> I am curious on how to correctly run System code with R under Ubuntu. I
> tried to execute below 2 lines of code using system() functions in Ubuntu
> server, however could not achieve the desired result.
>
> system('Xvfb :10 -ac &')
> system('export DISPLAY=:10')
>
> System parameters:
> > Sys.info()
>                                        sysname
>                                        "Linux"
>                                        release
>                            "4.4.0-128-generic"
>                                        version
> "#154-Ubuntu SMP Fri May 25 14:15:18 UTC 2018"
>                                       nodename
>                   "ubuntu-s-2vcpu-4gb-blr1-01"
>                                        machine
>                                       "x86_64"
>                                          login
>                                         "root"
>                                           user
>                                         "root"
>                                 effective_user
>                                         "root"
>
> Background:
> I use RSelenium package to perform various testing using web-browser. I
> have installed firefox to do the same, however to make RSelenium work, it
> requires display parameter as guided in below link:
> https://medium.com/@griggheo/running-selenium-webdriver-
> tests-using-firefox-headless-mode-on-ubuntu-d32500bb6af2
> I want to set those parameters through R, each time I start R in Ubuntu
> server.
>
> Appreciate for any pointer.
>
> Thanks,
>
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>
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