TLDR
Enter a command. For example: cpufreq set, raw, mountpoint.

xvfb-run

 
Run a command in a virtual X server environment. More information: https://www.x.org/wiki/.
 
  • Run the specified command in a virtual X server:
     
    xvfb-run {{command}}
     
  • Try to get a free server number, if the default (99) is not available:
     
    xvfb-run --auto-servernum {{command}}
     
  • Pass arguments to the Xvfb server:
     
    xvfb-run --server-args "{{-screen 0 1024x768x24}}" {{command}}
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