Questions tagged [troubleshooting]

Troubleshooting is a form of problem solving, often applied to repair failed products or processes.

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Tried a bunch of distros, they all randomly freeze, crash & reboot. Even on bootable drive. Plz Help!

Its been a month now since I built this pc. It is running fine on Windows. Decided to dual boot Linux for programming and all. And then got these problems. I don't know what exactly is wrong, so I ...
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How do I troubleshoot my sd card reader?

My card reader doesn't seem to be able to recognise, let alone read, anything any more. lspci -v lists the device: 06:00.0 SD Host controller: O2 Micro, Inc. SD/MMC Card Reader Controller (rev 01) (...
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25 views

WiFi only works after running Antenna Aggregation commnads Pop!OS

I have installed Pop!_OS (home page) on my ASUS ROG Zephyrus S (manufacturer page). Every time I restart my PC, WiFi does not connect automatically until I run following commands (Antenna Aggregation):...
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Very high kernel procces time usage in new, idle server

We've recently installed a new server, which shows very high process usage in the kernel - as seen here with htop: the cores and memory are reserved - so the usage is normal - but I've never seen ...
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neo4j error: org.neo4j.server.CommunityEntryPoint

I'm using Manjaro Linux (VM) for penetration testing practice. I'm trying to get neo4j to work so I can use BloodHound. Installed packages: blackarch/bloodhound 923.66ffed1-1 blackarch/neo4j-...
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174 views

Ubuntu 20.04 - GNOME DE freezes

Recently, I installed Ubuntu 20.04 on my machine with the following specifications:- Processor: Intel Core i5, 2.30GHz x 4 (four cores) RAM: 8GB Graphics Card: AMD Radeon, 4GB While working on the ...
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57 views

Replacing old SATA cables. Could the old ones be cause of dmesg errors on HDDs?

Background When I assembled one of my servers with brand new disks WD Red 3TB, I have possibly made grave error in judgement, which was to use one older and one really old SATA (wikipedia) cables. My ...
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28 views

How can I scan/test/explore if my Firefox (profile) has been infected?

I use Debian and because of that the version in the reps is outdated, so I have Firefox Quantum that is fully unpacked in a folder where my non-root user has all permissions to read, write and execute....
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Something is messing up with my keyboard and mouse. How to find what is causing this problem?

OS: Debian GNU/Linux 9 (used as OS of my notebook) The problem: Sometimes following things start to happen. The computer stops adequately reacting on hotkeys, as if one key was already pressed and ...
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67 views

pandoc error: Permission denied

I'm on Manjaro Linux. I have texlive-most installed. I'm trying to make pdf files from md with pandoc. However, I keep getting Permission denied errors. I've tried using pdflatex and pdfroff. Run ...
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37 views

When creating a LiveUSB, write to the partition (/dev/sdb1) or to the device (/dev/sdb)?

How should I write the img or iso to a pen drive? I'm trying several combinations, but fail to boot and I'm not sure the problem is in the writing to the pen drive, so I want to discard this ...
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1answer
352 views

Display manager not working, Debian 10 boots into tty1

The result of running startx shown below: I’ve installed and used Debian 10 for a couple days now with no problems. Last night I began setting up vim, I downloaded a plugin manager as well as git. ...
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237 views

How to install zenmap on Fedora

I'm trying to install Zenmap after installing Nmap however it's not quite working. I tried just the regular terminal command dnf install zenmap however it tells me that they're unable to find a match. ...
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28 views

Where can I find my lost mount data?

I am using a cloud platform to store some data. I usually access this through the terminal, and I mount my data with mount /dev/vdc mydata. For some reason, when I did this recently, I got the ...
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92 views

In Arch, web browsers crash when opening file finder dialogue window

I recently update my Arch, and I am currently running kernel version 5.6.6-arch1-1. When I try to open a file finder window either from Firefox or from Chrome (e.g. uploading an email attachment), ...
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Software application directory wrong, unable to update to fedora 31

I am trying to upgrade to fedora 31, but am getting the error message as seen in the picture. I think this happened after a failed attempt when I first got fedora to start using openvpn. It looks like ...
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139 views

How to make Wifi Hotspot on Kali (No Ethernet Connection)

I want to share wifi to my other devices. I want to make a hotspot. I made a new wifi connection chose Device wlan0 and mode Hotspot. Hotspot is Made but there is No internet access. How do I share ...
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Screen splits in a Toshiba laptop: how to fix it?

I have this weird issue: when I start my Toshiba laptop the screen gets split in three. It does not happen always, but happens very frequently. To fix it, I restart/turn-off the machine until it gets ...
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why when i boot a game like over watch my mouse go up by itself without stop unless i pull it up off table

Iv try switching mouse. I've messing with setting. Over watch completely going up. I can move it but go up. it at the point were i can't play
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66 views

Troubleshooting boot issues

Server was running on Centos7 and it suddenly stopped responding. We tried rebooting and it is not able to find any OS to boot. We have tried the following troubleshooting. Tested ram using memtest, ...
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How can I login into Plasma (Wayland is OK)?

After a crash, I am not able to login into my Plasma DM. Wayland works fine though. When I type the password, it just asks me for the password again in an infinite loop. I tried chown myuser:myuser ...
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110 views

Can't Login to Fedora 31 After System Restore

I'm new here, so I apologize in advance for how ineptly I may ask this question. I recently had to restore my entire Fedora 31 system from a backup made with Rsnapshot. (I had intended to make ...
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1answer
1k views

Crontab command missing in Fedora 31

Probably a ridiculously simple question, but I cannot find a thing on this online. I am using vagrant boxes for several tests and in this particular case it is the Fedora 31 box from Bento with ...
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1answer
64 views

`ls -d */` is not working on one specific directory [duplicate]

ls -d */ runs fine in all other directories that I tried, but in one specifically, I get this: ls: invalid option -- '/' Try 'ls --help' for more information. I pasted the command in the terminal, ...
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304 views

Unraid Unable to mount btrfs - need help

I need help with mounting a broken btrfs filesystem, after 1 of the disks dropped from the pool, tried to be replaced and now refuses to mount. I'm using Unraid 6.8.1. The 1st in 2-disk pool ...
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33 views

Enabling multicore causes corrupted files

I am running the latest Manjaro with Cinnamon on a Thinkpad X1 Extreme 20QVCTO1WW. The CPU is an Intel i5-9300H. I currently have multicore disabled in the BIOS but hyperthreading enabled, so lscpu ...
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1answer
25 views

How do I troubleshoot a process that kills GNOME Shell?

Whenever I killall evolution and occasionally when I use the GUI to quit, I am kicked out of my GNOME Shell session and have to log in again. I obviously want to determine the cause but I don't know ...
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36 views

How to get SD memory card reader to work on Thinkpad X1 20FB?

I have a 4th Gen Thinkpad X1 Carbon (Model 20FB) running Debian 10. There is a memory card slot in the back, but it doesn't seem to work. I'm guessing the drivers are missing. I tried searching online ...
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2answers
751 views

Virtualbox Linux Mint boot black screen with blinking line

I'm trying to install Linux Mint (Cinnamon) in VirtualBox. I have set up the machine and .iso, but when it boots it just shows a black screen with a blinking horizontal line. I had a similar issue ...
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1answer
35 views

Certain applications hanging every few seconds, stops with external monitor

I have an issue on my laptop where the graphical output of certain applications seems to hang every few seconds, but other than graphically hanging the application seems to carry on working, eg, audio ...
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1answer
28 views

Unable to connect to internet on RHEL-7 after botched upgrade

So my situation is, I was previously able to setup network connectivity on my RHEL-7 guest OS (running on host OS Windows 7 using VirtualBox). I messed up an upgrade causing a kernel panic, so I ...
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69 views

Im having brightness issue and need clarification on a possible fix

Hello i have been using Linux for two years so im still new to the whole community. please forgive me in advanced if this question is stupid and/or in the wrong forum. I have a laptop this ...
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2answers
4k views

Startup Debian 10 error: networking.service loading failed

I've noticed that every time I turn on my PC, there is a line in red. My PC is pretty fast so I don't get to read the problem. I haven't experienced or noticed any problem with my system, but I'm ...
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56 views

Crash when changing back to tty1

I'm using arch linux with mate-desktop. Whenever I press ctrl+alt+fk, where k=2,...,9 I switch to a tty. However when I want to return I do ctrl+alt+f1which results in a system crash. After that I can'...
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181 views

startx blank screen

This happened after I changed GRUB_CMDLINE_LINUX_DEFAULT="quiet" to GRUB_CMDLINE_LINUX_DEFAULT="" and updating the grub config. After rebooting when I do startx I only get a black screen with a mouse. ...
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1answer
75 views

Launching applications from application launcher with “TZ=UTC” prefixed stopped working

I had a launcher for firefox with command TZ=UTC firefox. Suddenly it stopped working, I think after I did pacman -Syu (I only clicked again much later so it could be something else). I am using arch ...
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1answer
808 views

A stop job is running… if I execute dhcpcd and don't kill it on ARCH

I have recently installed arch. Noticed that when shutting it down often a "A stop job is running for session 3 of root.." message appears which takes 1:30 minutes to dissapear. Further investigation ...
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67 views

Can't change resolution or can't detect monitor

The computer is a MSI Gl63 8RD. I installed Debian 9 on it. When I booted it it had a very low resolution. Upon executing xrandr, this outputted: xrandr: Failed to get size of gamma for output ...
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380 views

Slow wired connection on Linux but normal speed on Windows

I installed Ubuntu, Pop_OS, Manjaro, Neon, and Deepin, to my desktop PC (specs at bottom). My internet speed was very slow, basically unusable. Windows gives a normal 15 Mb down and 10 Mb up, but ...
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1answer
105 views

Passing parameters to a BASH function

I'm trying to run FoxitReader from the command line. For opening it, I created this function: foxit(){ /home/quora/opt/foxitsoftware/foxitreader/FoxitReader.sh } export -f foxit And put it ...
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2answers
208 views

Correcting PATH after dist upgrade?

After a dist upgrade (Debian 9 to Debian 10) some things stopped working. For example, iwconfig, losetup, ifconfig, poweroff, pm-hibernate. These commands work if I type the full path like /sbin/...
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1k views

xrandr doesn't list display port

My laptop (Thinkpad W530) has a VGA and a mini DP port (OR a DP port via docking station). Ubuntu 18.04, xrandr in particular doesn't seem to recognize the DP. For example if I run xrandr gives me ...
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37 views

Getting wifi errors

I've been unable to get WiFi reliably working firstly on Ubuntu and now on Arch. It potentially seems like a hardware issue, but it was flawless on Windows - then I switched to Ubuntu and it would ...
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1answer
680 views

youtube-dl, how to write all subs of a youtube playlist to ONE single file?

I'm on Fedora 28 OS and have youtube-dl version 2019.03.18 and I wanted to download all the subs and only the subs of a Crashcourse playlist off of youtube, consisting of 45 videos. I want all the ...
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926 views

How can I track script which gives me “command not found” right after the login?

When I login, I have these messages: -bash: $'\r' : command not found -bash: $'\r' : command not found -bash: $'\r' : command not found It is quite clear that it is caused by Windows-style line ...
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388 views

Plymouth Boot Screen hang

Centos 7 unable to boot normally hangs on plymouth screen. And gives this. Warning dracut Centos 3.10.0.514.26.2.el7. Kvm was installed. When tried to boot in rescue mode it give this error ...
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2k views

Booting with `cgroup: cgroup2: unknown option “nsdelegate”` prevents any graphics from appearing

I recently updated my Linux 4.9.0-8 debian 6.3.0. However, when I restarted my machine, ended up having the message in the title. Preventing me from accessing the graphical terminal. I can't access my ...
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289 views

Can't launch GIMP pre-installed via Flatpak on Linux Mint 19, how to debug?

I have quite a fresh installation of Linux Mint 19 Cinnamon with GIMP pre-installed via Flatpak: Basic info $ flatpak info org.gimp.GIMP Ref: app/org.gimp.GIMP/x86_64/stable ID: org.gimp.GIMP Arch: ...
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1answer
661 views

Nothing Is Working: Installing Debian on USB

I need to be able to run a linux distribution on my Windows 10 laptop, so I decided to go with Debian. I want to have a USB flash drive that I own run Debian on my laptop, instead of having my laptop ...
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108 views

Programs fail to run after moving /home to a different partition on same drive

I am running Arch and was having no difficulties until I moved my home dir to a different partition on the same drive. The sequence of events: Format other partition to ext4; mount it to /mnt Move ...

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