All Questions

29
votes
0answers
6k views

git-upload-pack hangs indefinitely

I have the following call structure: Jenkins runs fab -Huser@host set_repository_commit_hash:123abc. set_repository_commit_hash runs git fetch with pty = False. The child process ssh git@github.com ...
12
votes
0answers
4k views

Random “deauthenticating by local choice (Reason: 3=DEAUTH_LEAVING)”

I'm running uname -r 4.10.6-1-ARCH on my dell XPS 13 developer edition (2014). I'm currently having strange problems with my wifi (I use Networkamanger with nm-applet for KDE): 1) at the most ...
12
votes
0answers
669 views

What happens with unix stream ancillary data on partial reads

So I've read lots of information on unix-stream ancillary data, but one thing missing from all the documentation is what is supposed to happen when there is a partial read? Suppose I'm receiving the ...
11
votes
0answers
371 views

Why does my terminal letter-spacing decrease when I disable a display return from using /dev/tty?

I've got a curious hardware situation, and I've run into a curious software quirk. I have a laptop with a broken screen that I have hooked up to an external display. I start up an X session and open a ...
11
votes
0answers
711 views

Visual feedback for window focus with Alt-Tab? (Cinnamon)

I have a frequent problem that occurs with window-based desktops like Cinnamon or XFCE, especially on multiple monitors. I very often misread which Window has focus after Alt-Tab. So I will start ...
11
votes
0answers
2k views

Lenovo T440s battery status unknown, but charging?

I'm trying to configure my Lenovo on arch linux. The last thing I need to do is get the battery 100% working. Right now it appears that the main battery's state is unknown: ...
10
votes
0answers
535 views

Normal notifications over full screen applications in Gnome 3

In my workflow I use applications in fullscreen mode most of the time. The only serious drawnback I have in that is the way Gnome 3 handles desktop notifications, I can't get any normal notification, ...
10
votes
0answers
140 views

How much space would be freed by removing a btrfs subvolume?

Is there any way to calculate how much space I would free if I would remove one (or several) subvolumes on a Btrfs disk (without actually removing them)? I know that there is "currently no code that ...
10
votes
0answers
4k views

Graph is too large for cairo-renderer bitmaps Error

Im trying to use pyreverse to generate images of UML diagrams for a project source code. When I run the pyreverse command and specify to generate .png images, it runs and then after a while, it shows: ...
9
votes
0answers
42 views

How can I make ethernet take precedence over wifi on Ubuntu 18.04?

Goal Let ethernet take precedence over wireless when ethernet cable is plugged in Method After having done a fair amount of Googling and reading I've come to a point where I believe what I should ...
9
votes
0answers
621 views

wpa_supplicant end process if wrong password detected

Normally when I run wpa_supplicant I'll get some output like this: Successfully initialized wpa_supplicant ioctl[SIOCSIWAP]: Operation not permitted ioctl[SIOCSIWENCODEEXT]: Invalid argument ioctl[...
9
votes
0answers
195 views

Increase sound volume on eMac P69 running FreeBSD 10.3

I've got FreeBSD 10.3 (PowerPC) installed on eMac P69. I'm using MPlayer to test loudness. I already use -af volume=10:1-like options but they tend to distort sound pretty quickly + it is not really ...
9
votes
0answers
244 views

Is this documented behavior for BSD Awk, or a bug?

Apparently, a bracket expression in BSD Awk which contains a character class will ignore any further characters after the character class: MacOS $ cat file.txt _ - . a B 8 : ; @ ~ , MacOS $ awk '/[@~....
9
votes
0answers
404 views

How to format & mount a large partition with 4k sector size in Freebsd?

gpart show -l: => 6 146239733 da0 GPT (558G) 6 10 - free - (40K) 16 128 1 (null) (512K) 144 262144 2 efi (1.0G) ...
9
votes
0answers
590 views

ZFS scrub does not complete

First off let's start with what I'm running. This is a home media server running Ubuntu 16.10. I have one pool of mirrored 6 terabyte drives that are about half full. I built the system about a month ...
9
votes
0answers
1k views

curl request to IPv6 localhost gets stuck

A docker container of mine exposes a HTTP interface on port 8500, which is mapped to host port 8500. It is not IPv6 enabled. This still means, I should be able to access it at localhost:8500. IPv6 ...
9
votes
0answers
1k views

Display btrfs subvolume tree

Is there a way to make a btrfs subvolume tree like what is shown below? (Only subvolumes - no regular directories or files.) # tree /mnt/1 /mnt/1 ├── a ├── snapshot │ ├── a │ └── subv └── subv ...
9
votes
0answers
471 views

How can I connect to the same server in multiple irssi instances?

I have an irssi session which is connected to Freenode (via /server fn), in which I am in multiple related channels. This session is inside of a tmux instance which has other terminals, also related ...
9
votes
0answers
216 views

Discover what is cached by dm-cache

I am using dm-cache successfully for quite a while now. Now I would like to know which files are being currently in the cache. I understand that dm-cache works with blocks, not files, but since there ...
9
votes
0answers
3k views

How to disable sudo related logging for successful command execution under CentOS/Fedora?

You can disable sudo related log messages via adding something like Defaults:juser !syslog to our sudoers file. That is disabling logging to syslog. But under e.g. CentOS/Fedora there is an auditd ...
9
votes
0answers
819 views

What does hierarchy support do in cgroup?

cgroup has 2 options for memory control: memory.use_hierarchy = 1 : use hierarchy memory.use_hierarchy = 0 : use flat hierarchy, according to this answer What is the difference between the two? I ...
8
votes
0answers
161 views

Why can't I “swapoff” when there's plenty of memory?

I've recently noticed that even though there's a lot of memory on my system: # free -m total used free shared buffers cached Mem: 15965 9680 ...
8
votes
0answers
314 views

How to disable the volume popup in KDE Plasma 5.13?

In older versions I used to comment out osd.show(percent) in the functions increaseVolume and decreaseVolume in the file /usr/share/plasma/plasmoids/org.kde.plasma.volume/contents/ui/main.qml (blog ...
8
votes
0answers
205 views

Use alternative file selector in mutt

In mutt, is it possible to use a file browser such as vifm or ranger (possibly in a tmux split) instead of the default file browser to select a file to attach to an email?
8
votes
0answers
1k views

Virtual Machine Manager wants to inhibit shortcuts - again and again - on Wayland

I've recently reinstalled my workstation with Fedora 27, and since doing so, virt-manager has been doing one strange thing. Every time I open a VM console and then move the mouse into the window, a ...
8
votes
0answers
648 views

gnome-keyring usage without an x session

My use case is that I have a headless server that software development is performed on. I ussually enable X11 forwarding for the SSH connections to it, but I can't for distant locations with slow ...
8
votes
0answers
2k views

unlock login gnome-keyring on i3wm autologin

Problem This question seems to have been asked a billion times, but I'm still completely unable to unlock my login keyring automatically. Background I automatically login, chvt and startx along ...
8
votes
0answers
570 views

How exit from videotest in the grub?

I am checking different video resolutions in the grub menu by using videotest and vbetest programs and can't go back to the grub command line, after using this programs. System doesn't respond - like ...
8
votes
0answers
882 views

Merge pdf files and automatically create a table of contents with each file as an entry

I have several pdf files (chapter1.pdf, chapter2.pdf, etc.), each one being a chapter of a book. I now how to merge them into a single pdf (I use the command pdfunite from poppler), but since the ...
8
votes
0answers
2k views

Overriding gtk3 theme colors

I'd like to achieve something I thought would take a couple of seconds and turns out to be a nervous breakdown: override theme's selected item color in a GTK3 theme. At first, I naively though that ...
8
votes
0answers
3k views

How do I take a screen shot of my Xvfb buffer?

I'm using Amazon Linux. I want to run a headless chromium browser for use with my node.js Selnium tests. So I fire up my Xvfb server like so ... if ! pidof /usr/bin/Xvfb; then Xvfb :0 -screen 5 ...
8
votes
0answers
1k views

Resetting bluetooth on Archlinux

Sometimes it happens that my bluetooth mouse gets disconnected from my laptop. Switching off/on the mouse doesn't help. Switching off/on my laptop bluetooth doesn't help either. Not even systemctl ...
8
votes
0answers
643 views

Does BTRFS guarantee data consistency on power outages?

As ZFS states exclusively, ZFS is claimed to be invulnerable ZFS accepts that it might be vulnerable to power failures. I couldn't find such a statement for BTRFS. Is it (or designed/planned to be) ...
8
votes
0answers
528 views

xsel and xclip hang

My objective is to make a text on my remote machine (CentOS 7.2) available to seamlessly paste on my local machine (OS X 10.12.2) with the standard ⌘V shortcut. My setup connects to the remote ...
8
votes
0answers
890 views

Sound playback over bluetooth lags

I followed the instructions on Arch Linux Wiki and managed to set up sound playback thorugh bluetooth. However, there is a serious lag when using A2DP profile. No problems when using the headset ...
8
votes
0answers
455 views

User-based GPU priority

I have a computer running Linux (Kubuntu 14.04.3 LTS x64), where I use the CUDA toolkit to perform some computations on some Nvidia GPUs. I share the computer with a few other users. How can I define ...
7
votes
0answers
401 views

Save and restore tabs in gnome terminal

We have GNOME Terminal 3.14.3. This version does not support --save-config option. Is there any other way to do so in this version? How else can one save and restore tabs? What version of gnome ...
7
votes
0answers
5k views

performance comparison of e1000 and virtio-pci drivers

I made a following setup to compare a performance of virtio-pci and e1000 drivers: I expected to see much higher throughput in case of virtio-pci compared to e1000, but they performed identically. ...
7
votes
0answers
2k views

how do I send mutt postponed mail at a later time?

I don't like waking up early but people prefer to be emailed in the mornign rather than at 3AM. Therefore I often use at to send the email whilst I'm asleep. But that comes with the complication ...
6
votes
0answers
1k views

11 GB of GPU RAM used, and no process listed by nvidia-smi

In my GPU #0, 11341MiB of GPU RAM is used, and no process is listed by nvidia-smi. How is that possible, and how can I get my memory back? Thu Aug 18 14:27:58 2016 +-----------------------------------...
6
votes
0answers
655 views

How do I get xinputrc to work for login screen?

I have the following lines in /etc/X11/xinit/xinputrc to tame my mouse sensitivity: xinput --set-prop 9 "Device Accel Constant Deceleration" 4.5 xinput --set-prop 9 "Device Accel Velocity Scaling" 1 ...
6
votes
0answers
2k views

Setting the EFI Framebuffer's Resolution during boot

I've got a MSI WD-60 laptop running Gentoo. It has one of those 3840x2160 screens so I've had to setup Gnome/Firefox/IntellJ to double their DPI for anything to be readable. It all works fine except ...
6
votes
0answers
2k views

How does enabling btrfs quotas impact the system?

I use btrfs snapshots quite a bit, and one of the things that interests me is how much space a given snapshot takes up - or to be more specific - how much exclusive data a btrfs snapshot is taking up, ...
6
votes
0answers
5k views

Enable Alt+Ctrl+t to open a terminal in LXDE

How can I enable shortcut Alt + Ctrl + T to open terminal on Debian in LXDE? I found that this is possible to define in rc.xml file. In LXDE webpage I found message: How do I define LXDE settings ...
6
votes
0answers
677 views

xdotool and xbindkeys

I have an Acrobat reader that does not zoom on Control+plus but rather on Control+acute (Control-plus annoyingly rotates the document). I would like to fix this using xbindkeys and xdotool but the ...
6
votes
0answers
18k views

So, what do I do with the output of yum check?

When I run yum check (or try to use yum to update my system generally), I get the following: # yum check Loaded plugins: langpacks, presto, priorities, refresh-packagekit krb5-devel-1.10.2-12.fc17....
5
votes
0answers
230 views

dnf tab completion hangs

Tab completion is hanging when attempting to complete package names. eg dnf info fire[TAB]. How can I fix this? It works in general for bash, and also for completing dnf options, but not for package ...
5
votes
0answers
58 views

How to compare string values with seccomp?

Some Linux system calls (such as execve, openat) have string type arguments. But the comparison function SCMP_CMP provided by seccomp seems to be comparing two pointers. So how can I limit files that ...
5
votes
0answers
158 views

cifs: Cannot cd into a directory

For some reason I cannot cd into a particular remote directory for which I have access, it fails with: $ cd Data\ Services/ -bash: cd: Data Services/: Invalid argument This is how I mounted it: $ ...
5
votes
0answers
3k views

Fedora 29: Failed to synchronize cache for repo 'fedora-modular'

I upgraded Fedora 27 to 28, worked with it a bit (did not run dnf update) and then upgraded to 29. This morning I tried sudo dnf -v update and I got sudo dnf -v update ...

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