Category Archives: Linux

DevToys can’t start on Ubuntu 24.04

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DevToys is a collection of essential developer tools packed into a single desktop application. It provides a wide range of utilities, including a color picker, JSON viewer, and various text manipulation tools, all in a user-friendly interface.

Symptoms: When you click on the DevToys icon, nothing happens. If you try to execute it through the terminal using the devtoys command, it throws the following error:

$ devtoys 

(DevToys:1306833): Gtk-WARNING **: 17:45:26.037: Theme parser error: gtk.css:7879:18-22: Expected a number

(DevToys:1306833): Gtk-WARNING **: 17:45:26.037: Theme parser error: gtk.css:7891:18-22: Expected a number

(DevToys:1306833): Gtk-WARNING **: 17:45:26.070: Theme parser error: gtk-dark.css:7879:18-22: Expected a number

(DevToys:1306833): Gtk-WARNING **: 17:45:26.070: Theme parser error: gtk-dark.css:7891:18-22: Expected a number

(DevToys:1306833): Gtk-WARNING **: 17:45:26.150: Theme parser error: gtk-dark.css:7879:18-22: Expected a number

(DevToys:1306833): Gtk-WARNING **: 17:45:26.150: Theme parser error: gtk-dark.css:7891:18-22: Expected a number

(DevToys:1306833): Gtk-WARNING **: 17:45:26.171: Theme parser error: gtk-dark.css:7879:18-22: Expected a number

(DevToys:1306833): Gtk-WARNING **: 17:45:26.171: Theme parser error: gtk-dark.css:7891:18-22: Expected a number
bwrap: setting up uid map: Permission denied

** (DevToys:1306833): ERROR **: 17:45:26.238: Failed to fully launch dbus-proxy: Child process exited with code 1
fish: Job 1, 'devtoys' terminated by signal SIGABRT (Abort)

The issue is that DevToys doesn’t work on Ubuntu 24.04 due to the missing AppArmor bwrap profile. This is because Ubuntu 24.04 has introduced restricted unprivileged user namespaces, and the AppArmor profile for bwrap is not included by default.

As mentioned in this comment (https://github.com/DevToys-app/DevToys/issues/1198#issuecomment-2411370778), the solution is to install the apparmor-profiles package, link the bwrap profile, and load it.

Here are the steps:

sudo apt install apparmor-profiles
sudo ln -s /usr/share/apparmor/extra-profiles/bwrap-userns-restrict /etc/apparmor.d/
sudo apparmor_parser /etc/apparmor.d/bwrap-userns-restrict

After following these steps, DevToys should start working correctly on Ubuntu 24.04.

Best Git GUI Clients to Easily Merge Git Branches

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Managing Git branches can be a complex task, especially when it comes to merging them. Fortunately, there are several Git GUI (Graphical User Interface) clients that can simplify the process and make it more user-friendly. In this article, we’ll explore three of the best Git GUI clients that can help you easily merge Git branches.

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locale: Cannot set LC_CTYPE to default locale

I have an Ubuntu 24.04 server and I have the following errors when I run “locale” command:
locale: Cannot set LC_CTYPE to default locale: No such file or directory locale: Cannot set LC_MESSAGES to default locale: No such file or directory locale: Cannot set LC_ALL to default locale: No such file or directory
That’s how I fixed it:
sudo apt-get update
sudo apt-get install locales
sudo locale-gen en_US.UTF-8
sudo update-locale LC_ALL=en_US.UTF-8

Pi-Hole and IPV6 – How to make it work?

Im using Pi-Hole with IPV4, recently I discovered my router Xiaomi AX1800 (OpenWRT) supports IPv6, as well as my ISP (A1).

I noticed that I can assign DHCP static IPv4 assignment from the router’s interface, but I can’t do the same for IPv6. That’s why I decided to set a static IPv6 address for the machine running Pi-Hole (Raspberry Pi 2).

There is a short guide on how to do that:

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Organize pictures by the data taken 


#!/usr/bin/env bash
BASE_DIR=$1

if [ ! -d "${BASE_DIR}" ] ; then
echo "$BASE_DIR is not a directory";
fi

## Find those files that are older than a month
find "$BASE_DIR" -maxdepth 1 -mtime +30 -type f -name '*.jpg' |
while IFS= read -r file; do
## Get the file's modification year
year="$(date -d "$(stat -c %y "$file")" +%Y)"
## Get the file's modification month
month="$(date -d "$(stat -c %y "$file")" +%b)"

## Create the directories if they don't exist. The -p flag
## makes 'mkdir' create the parent directories as needed so
## you don't need to create $year explicitly.
[[ ! -d "$BASE_DIR/$year/$month" ]] && mkdir -p "$BASE_DIR/$year/$month";

## Move the file
mv "$file" "$BASE_DIR/$year/$month"
done

Hot to install GPaste on Ubuntu 23.10

GPaste is an open-source clipboard management tool for Linux-based operating systems. Clipboard managers like GPaste allow users to manage and access a history of items they have copied to the clipboard, enabling them to easily paste previously copied content.

Sadly, there are binary packages available but you can compile it and install it manually.

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Docker fails to fetch http://deb.debian.org/debian/dists/buster/InRelease

I found a network issue when trying to build my docker image: the command `apt update` fails with the following error:

W: Failed to fetch http://deb.debian.org/debian/dists/buster/InRelease
W: Failed to fetch http://deb.debian.org/debian/dists/buster-updates/InRelease
W: Failed to fetch http://security.debian.org/dists/buster/updates/InRelease
W: Failed to fetch http://deb.debian.org/debian/dists/buster/Release.gpg Temporary failure resolving ‘deb.debian.org’
W: Failed to fetch http://security.debian.org/dists/buster/updates/Release.gpg Temporary failure resolving ‘security.debian.org’
W: Failed to fetch http://deb.debian.org/debian/dists/buster-updates/Release.gpg Temporary failure resolving ‘deb.debian.org’
W: Some index files failed to download. They have been ignored, or old ones used instead.

This happens because your ISP DNS servers are not reachable from this network. The easiest workaround is to directly instruct Docker to rely on some public DNS servers proven to be stable and reliable (Google, Cloudflare).

Add them to a new configuration file called daemon.json:

$ sudo pico /etc/docker/daemon.json

Insert the following:

{
    "dns": ["1.1.1.1", "8.8.8.8", "8.8.4.4"]
}

Then restart the service:

$ sudo service docker restart

How to install autojump for Fish on Ubuntu

Autojump is a tool that can be used to jump around in the shell to frequently used directories by typing just a part of their name. It is typically aliased to j. Autojump is available as a package in the Ubuntu repositories, but it needs manual intervention to be available in the fish shell.

1. Install autojump

sudo apt install autojump

2. Source the autojump.fish file in your fish configuration, by opening the file ~/.config/fish/config.fish in an editor and adding these lines:

begin
    set --local AUTOJUMP_PATH /usr/share/autojump/autojump.fish
    if test -e $AUTOJUMP_PATH
        source $AUTOJUMP_PATH
    end
end

3. Add j shortcut command to fish creating a new file ~/.config/fish/functions/j.fishwith the following content:

function j
    set new_path (autojump $argv)

    if test -d "$new_path"
        echo $new_path
        cd "$new_path"
    else
        echo "autojump: directory '$argv' not found"
        echo "Try \`autojump --help\` for more information."
        false
    end
end

Usage examples:

– j Down – changes to my Downloads folder
– j work – changes to my workspace folder

Enjoy!

GSConnect doesn’t mount my phone on Manjaro Gnome, this is the solution

Hi there! I am using the Gnome shell extension GSConnect on Manjaro Gnome to share files from my phone to my laptop. There is an option called “Mount” that initially didn’t work on Manjaro but I found a solution and it now works like a charm!

All you need to do is to edit the file /etc/ssh/ssh_config

sudo vim /etc/ssh/ssh_config

and add to the end of the file the following:


Host 192.168.*.*
HostKeyAlgorithms +ssh-rsa