How do I know if Xserver is running?
If you want to check whether x11 is installed, run dpkg -l | grep xorg . If you want to check if x11 is currently running (if logged in) then run echo $XDG_SESSION_TYPE . Paste the output.
How can I check Xorg status?
How to check your current Xorg version
- Example: [root@myred ]# rpm -qa |grep xorg-x11-server-Xorg. xorg-x11-server-Xorg- 1.17.2-10.el7.x86_64.
- sles5:~ # rpm -qa |grep xorg-x11-server. xorg-x11-server- 7.6_1.15.2-30.19.3.x86_64.
- Example: root@ubuntuDemo:~# dpkg -l |grep xserver-xorg-core.
How to get the X Server display number?
Recent X servers as of version 1.13 ( Xvfb, too) support the -displayfd command line option: It will make the X server choose the display itself and write the display number back to the file descriptor . It’s a bit convoluted, but this would be a safe and race-condition-free way to ask Xvfb to use any free display.
Where to find X11 display number Stack Overflow?
This is called /tmp/.Xn-lock where “n” is the Display id. (Also note the leading . in the filename). This is the mechanism that Xserver itself uses to check for duplication, and it appears to be consistent on all *nix platforms I have tried (HP-UX, Linux.)
How to check if X Server is running?
EDIT: Some people suggested using the $DISPLAY variables but what if the user fiddles with this variable ? what if he tries to do something and changes this variable and then when I check it, it no longer reflects an accurate state of the system. Is there no specific way to do this that will always return a correct answer ?
How to check display number Stack Overflow?
Using Xvfb to probe the displays, and lsof to check if are unix sockets in the Xvfb process, is more effective, notice the sleep 0.5, can be variable depends on the machine. #!/bin/bash DISPLAY=0 until [ $DISPLAY_NUM > 10 ]; do echo -n “Looking for display on $DISPLAY…”