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Questions tagged [troubleshooting]

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

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1answer
34 views

How to troubleshoot SELinux issues?

I suspect I have a problem in SELinux configuration: my issue goes away after disabling selinux using setenforce 0. I am using the default policy without any modifications. How can I pinpoint the ...
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2answers
61 views

Time drifting after NTP is configured

This is a XenServer 7.1 CU1 host. NTP should behave as in any other Linux distro. We have configured /etc/ntp.conf with following servers (have tried other servers with similar results and these ...
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8 views

need openvpn client configuration suitable for troubleshooting

I'm running an openvpn client and connecting to a commercial VPN provider (PIA). Every so often, that connection stops working. I can resolve the problem by manually restarting my client. However, I ...
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18 views

Software bootable raid 10 fails to boot into linux mint

I was flowing this guide. I'm using Linux Mint but it's Ubuntu based so it shouldn't be too much of a difference. Anyways it all goes well until I needed to chroot and reboot, after I run apt-get to ...
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1answer
35 views

Cannot connect/find any servers (Ubuntu gamepack)

Recently downloaded Ubuntu Gamepack via USB flash drive. All went well as far as I know and except for my internet problems all is well. I do not no why, and would like some assistance in ...
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1answer
95 views

Dual Boot Mint Linux cursor freezes on F541N (aka X541NA)- how to fix?

Bought ASUS VivoBook Max- F541N with pre-installed Win 10 few days ago and dual booted into Mint Linux Sylvia (Cinnamon) 18.3 successfully I see that the keyboard cursor (touchpad) pointer and ...
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2answers
51 views

Can boot Windows but unable to boot any linux

My laptop (Thinkpad W520) suddenly shut down without warning... I tried to reboot, passed grub without issue but, again, shut down during the boot process... I tried recovery mode: same. Live cd and ...
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0answers
58 views

Unable to boot linux ubuntu

Getting lvmetad is not active yet , using direct activation during sysinit /dev/mapper/dhcp--10--47--100--93-vg-root:clean We are able to boot through bootable USB. Using Ubuntu 16.04 version . ...
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24 views

Spontaneous turning off after reboot from Windows

How should I troubleshoot spontaneous turn off of my notebook running Debian Stretch? What happens: Boot to Windows (dual boot system with windows and Debian on separate drives) Reboot Boot into ...
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0answers
37 views

Same processes, different CPU usage

I have 2 Raspberry PI 3 Model B machines. They have exactly the same hardware and the same OS, the default one (Debian Jessie) provided by Raspberry. I use those machines to run a Ruby On Rails ...
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2answers
234 views

What causes permission to be denied for mounting rootfs, home, messeage queue, kernel file system, during boot?

My Fedora 27 x64 fails to boot after hard reset. It shows: Failed to mount POSIX Message Queue File System, Failed to start Remount and Kernel File Systems, Failed to mount Kernel Debug File System, ...
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144 views

How to install nvidia driver in laptop along with intel HD display on kali [duplicate]

So I had an asus laptop using 2 gpu. Intel HD graphics 620 as Display Nvidia GeForce 930MX as Render so when I tried to open some 3D application such as blender the application rendering using Intel,...
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0answers
105 views

Working out what is causing my machine to freeze

Background For a few years now, I have been having problems with my Xeon workstations freezing. For many things they have been lightning fast, but sometimes applications or even the desktop just ...
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0answers
33 views

Saving file to network directory fails

I have a text document on a different machine that I open through sftp. However, when I try to save it, I get an error message: Save File Failed! Error: ENOTSUP: operation not supported on socket, ...
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1answer
117 views

Is this error Unix/Linux specific in internet browsers OR Linux VPN related? [closed]

I want to know if the following problem is only in Unix/Linux systems and their internet browsers, since it occurs only with my Linux/Chromebook machines with VPN, but not in Windows machines with VPN....
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1answer
396 views

WD MyCloud NFS Mount to Asus Merlin Router: NFS mount troubleshooting: “no such device”

Goal: mount a UNIX NAS (WD myCloud) to a UNIX router. What has been done (do not assume it is correct): Checked router is running NFS client: ps | grep nfsd 19243 username 1376 R grep nfsd ...
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244 views

Python 3, no internet connection after update

I recently updated my Debian 9.3 and after this Python3 can't install packages any more (nor access the internet through an API). I assume that urllib3 was updated, and does not work well with ...
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1answer
524 views

system-config-samba crash with could not open configuration file `/etc/libuser.conf'

OS: Linux Mint 18.3 Xfce 64-bit. I am trying to re-install samba, so far I've done: sudo apt-get install samba cifs-utils system-config-samba But when running the configuration GUI: sudo system-...
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1answer
3k views

Troubleshooting advice for: -bash: cannot execute binary file: Exec format error

I am new to Linux so would love a simple explanation of how to troubleshoot this problem: I have a mining rig and am trying to run a program ./garlicoind but I get this error: -bash: ./garicoind: ...
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0answers
35 views

after fedora27 install wifi cannot connect

After a fedora27 install I cannot get my wifi to connect. The dmesg output it below. It appears that the problem is with the 4way handshake but I can't tell if that is a red herring. I have read that ...
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3answers
208 views

Why does a UDP client send 1Gbit speed to 100Mbit server?

I've just found out that in a simple UDP client/server application I wrote on Linux userspace, the UDP client (1 Gbit Ethernet interface) sends the data with 1 Gbit speed to a UDP server which has ...
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2answers
244 views

VirtualBox guest Win10 @ Linux host hangs big time at startup, how to troubleshoot?

I have a VirtualBox VM running Windows 10 on a Linux host. It used to work just fine, but this day when I started it it hangs big time. The VM’s window is just a black square, and also the host hangs ...
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1answer
135 views

Can't complete upgrade from fedora 25 to fedora 26

I tried to upgrade from fedora 25 to fedora 26. I followed the following commands, as explained in the journal sudo dnf upgrade --refresh sudo dnf install dnf-plugin-system-upgrade sudo dnf system-...
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3answers
460 views

Upgrade from fedora 25 to 27 - Conflict issue

I tried to upgrade from fedora 25 to fedora 27. When running sudo dnf system-upgrade download --releasever=27 --allowerasing I encountered a transaction check error regarding python. The error ...
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0answers
2k views

RTNETLINK answers: File exists on Ubuntu Server 16.04

I have a fresh new install of Ubuntu Server 16.04. After installation, network connectivity was fine. I installed QuickBox, it's a seeding/torrent server software (https://quickbox.io). After the ...
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1answer
2k views

Fedora 27 - Laptop won't suspend when closing lid

I am facing this rather bizarre situation. After shutting down my laptop by pushing the power button for a few seconds and powering it on again the "suspend when lid is closed" option isn't working. ...
3
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1answer
425 views

Figure out which process forks too many threads

I have a process in a Linux installation that at some point has some kind of spike and passes the max allowed number of threads/processes allowed by the system. I found this by checking ps -elfT | wc -...
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0answers
100 views

Network devices no longer working after updates, freezes

Computer: Thinkpad T430 OS: Fedora 27, Kernel: 4.13.16-300 After some updates - which included kernel updates, my system started freezing up, requiring a hard reboot. As time went on the freezes ...
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1answer
3k views

Chrony 3.1 refuses to sync with ntp server

I have 70 machine with CentOS 7.2 and chrony version 2.1.1 syncing perfect with my NTP server protocol v3. Recently I added 30 machines with CentOS 7.4 and chrony version 3.1, but these 30 machines ...
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0answers
295 views

How to restore Wayland Touchpad tap to click function?

My touchpad went malfunctioning almost one month ago, but I have not found a way to troubleshoot it, or find logs for it. After the system upgrade today 11th Nov, the touchpad started to work in the ...
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1answer
66 views

How to troubleshoot a (near total) freeze?

I'm running Gnome on Ubuntu 17.04. I had gnome-terminal in fullscreen, neovim in a tmux session, a background process compiling code, and Chromium running as well, when my system froze up on me. I ...
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1answer
135 views

Most programs suddenly segfault

I'm having a strange occurrence on my Raspbian Raspberry Pi, as most programs are now segfaulting before they even start: user@raspberrypi:~ $ sudo -s Segmentation fault user@raspberrypi:~ $ ssh -vvv ...
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105 views

How to find logs about Touchpad malfunction in Debian on Wayland?

I am trying to troubleshoot why my touchpad does not work anymore with Debian on Wayland (after pressing FN9 and FN8), continuing from the thread Why lost communication to Touchpad on Wayland Debian ...
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1answer
3k views

How do I view effective dns servers? [duplicate]

How do I list what dns servers are being searched for things that need to do dns searches? It doesn't seem like what I have in resolv.conf is being used, So i want to troubleshoot and step one of ...
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0answers
294 views

Cursor moving to the upper right corner

My dad bought a Lenovo Erazer X510 desktop system a little over a year ago. It is Intel based, and has an Nvidia graphics card. Not that it matters because the fault comes even on the integrated Intel....
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1answer
419 views

External HDD is extremely slow in Debian

Mounting, listing files, copying files is exceptionally slow. It's a new 1TB unit, formatted as ext4. I do not suspect any physical damage. Copying is at 64kB/s. No entry at /etc/fstab. When Nautilus ...
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0answers
892 views

Problem with installing Fedora 26 : “Error checking storage configuration” (Using Live USB)

I am on HP desktop with basic config as follow : OS Name Microsoft Windows 10 Pro Version 10.0.10586 Build 10586 Processor Intel(R) Core(TM) i3-3220 CPU @ 3.30GHz, 3300 Mhz, 2 Core(s), 4 ...
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0answers
425 views

Linux Mint starting into Emergency Mode

I run Linux mint of an external hard drive. Today it made I funny noise and when I rebooted it entered emergency mode. I can still use my laptop via: Advanced options for Linux mint 18 Cinnamon 64-...
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1answer
178 views

Linux desktop freezes regularly with audio skipping

My desktop freezes randomly at times, and takes no input from either mouse or keyboard. If an audio track is playing (video, .mp3, etc.), the audio skips on the last sound or syllable heard, then goes ...
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1answer
434 views

New extent size is not a perfect fit. error while changing PE in LVM

I have /dev/sda11 with 1040Mib and create VG with vg3 named. I have not mention -s for PE so it took 4 PE. I can delete it, but I want to change to PE 16. While using vgchange -s command I am ...
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1answer
636 views

How to check NAT live?

I'm doing some troubleshooting in our network and VPNs and I want to monitor the traffic and I want to see if the SNAT and DNAT is working fine. I want something live like tcpdump that I can see ...
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1answer
728 views

Connect to university WiFi using wpa_supplicant using ID and password

I recently re-installed my OS and forgot to back up my /etc/wpa_supplicant/wpa_supplicant.conf file, so I have been spending the day figuring out how to connect to the WiFi. I can connect to a public ...
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2answers
5k views

jetbrains-toolbox loads to a blank screen

For the last month or so, I've been attempting to get jetbrains-toolbox to work. It used to work (and is how I installed IntelliJ IDEA and Gogland.) When I went to update the IDEA I'm currently ...
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1answer
9k views

Manjaro won't boot after update, how to rescue?

I ran pacman -Syu yesterday and seeing quite a few updates, walked away from the computer while it was doing its thing. When I came back the lock screen had come up, and I was surprised to find that I ...
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2answers
147 views

Investigating problematic processes

When a command or process seems to hang, freeze, crash, or whatever; is there a way to investigate exactly what it's currently doing (if anything), behind the scenes? Would be especially useful to ...
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1answer
43 views

How to troubleshoot reading emails after server upgrade?

My host (Kapsi ry internet society) changed the servers, after which I have not been able to read my emails, etc by mutt and host's webmail: all mailboxes seems to be empty. I have done all proposed ...
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0answers
116 views

Troubleshooting: which file contains the error?

I currently try to get gcalcli working with conky. Everything looking good so far, I am just stuck on 1 error: error: argument command: invalid choice: 'calw2' Which makes sense. It should be calw 2 ...
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0answers
34 views

Bookmarks' suggestions are too slow in Firefox

After re-installing Firefox on my Linux Mint system I have been experiencing some trouble with my bookmarks; namely, when I start typing in the URL bar (the main bar in Firefox, the one on the left ...
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44 views

Why does the context menu take forever to open in Kdevelop?

I'm running Kdevelop 4.6.0 on Linux Mint 17.3, Mate. I've tried other version of Kdevelop but they have the same issue. When you right click in Kdevelop to open a context menu, I can literally count ...
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478 views

copying big files to a usb stick slows down tremendously after the first file

I'm trying to copy multiple 1GB+ files to a USB stick but after two transfers the subsequent transfers get very slow, I tried this with 2 different sticks. For instance I have a usb 3.0 stick and the ...