Why do thermal_zone1 in /sys/class has so many subsystem inside thermal_zone1?

I was trying to look into the device temperature. What I found has puzzled me. When I go to /sys/class/thermal/thermal_zone1/subsystem it has endless loop. You will understand what I meant if you see the following, which is the output ofpwd /sys/class/thermal/thermal_zone1/subsystem/thermal_zone1/subsystem/thermal_zone1/subsystem/thermal_zone1/subsystem/thermal_zone1/subsystem/thermal_zone1$ Output of ls in pwd: /sys/class/thermal/thermal_zone1/subsystem/thermal_zone1/subsystem/thermal_zone1/subsystem/thermal_zone1/subsystem/thermal_zone1/subsystem/thermal_zone1$ ls available_policies k_d k_po mode passive power subsystem…

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How do I prevent user to not to give an input in a specific location? (bash)

I write a basic script to test something. Let’s imagine I want to display the lines below (for no good reason): #!/bin/bash while true; do echo -e ” _____________________________________” echo -e “|_____________________________________|” echo -e “|_____________________________________|” echo -e “|_____________________________________|” echo -e “|_____________________________________|” echo -e “|_____________________________________|” read -p “Type a letter: ” letter done If I use…

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Touchpad not working ! I have updated the GRUB and my xlist does show the synaptic drive but still my touchpad is not working!

I have dell Inspiron 3000 series and Ubuntu 18.04. Recently my touchpad stopped working. It used to work fine but just a couple of days before, it has stopped working. I don’t think this is a hardware problem because neither my laptop fell nor it was rudely handled. I had a few small updates (which…

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