Category Archives: Linux

Stuff about Linux

Hyper-V, Linux, Windows

Linux: Prevent X11/Xorg from using a (Nvidia) GPU

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Hi,

when you install an NVidia GPU to run HPC tasks you usually don’t want that X11/xorg use it. This can be done by force Xorg to use the framebuffer device and prevent the nvidia_drm driver from creating a framebuffer device.
You can check this by nvidia-smi

root@debdev ~ # nvidia-smi 
+---------------------------------------------------------------------------------------+
| Processes:                                                                            |
|  GPU   GI   CI        PID   Type   Process name                            GPU Memory |
|        ID   ID                                                             Usage      |
|=======================================================================================|
|    0   N/A  N/A      1581      G   /usr/lib/xorg/Xorg                          167MiB |
|    0   N/A  N/A      1713      G   /usr/bin/gnome-shell                         16MiB |
+---------------------------------------------------------------------------------------+

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Linux, Network

Network: Forwarding SNMP Traps by mail with snmptrapd and snmptt

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Hi,

this post describes a simply way to forward all traps by E-Mail received via SNMP.

This process is splited in several steps

  • Receive the traps => snmptrapd
  • snmptrapd calls the trapshandler script after each received trap. The trap details are handed over to the script by STDIN
  • The trap handler is /usr/sbin/snmptthandler. This script spools all traps to /var/spool/snmptt
  • The snmptt gets the traps from the spool folder, translate them in a human readable format and calls a custum script defined by snmptt.conf

Continue reading Network: Forwarding SNMP Traps by mail with snmptrapd and snmptt →