8 posts tagged with "Ubuntu"

nmcli​

nmcli connection: Display all connections​

pi@raspberrypi:~ $ nmcli connection
NAME           UUID                                  TYPE      DEVICE
preconfigured  1b29633c-51a7-42a8-8357-a23ddbb791b9  wifi      wlan0
lo             37334688-5c87-47fc-87d3-8c4e31934dd2  loopback  lo
有線接続 1     0df9157e-b1a9-3026-9bd5-f05234e1cf4b  ethernet  --

nmcli device: Display devices and their states​

pi@raspberrypi:~ $ nmcli device
DEVICE         TYPE      STATE            CONNECTION
wlan0          wifi      接続済み         preconfigured
lo             loopback  接続済み (外部)  lo
p2p-dev-wlan0  wifi-p2p  切断済み         --
eth0           ethernet  利用不可         --

nmcli connection show ...: Display properties​

Run nmcli connection show <profile name> to display its properties.

pi@raspberrypi:~ $ nmcli connection show <プロファイル名>
connection.id:                          <プロファイル名>
connection.uuid:                        1b29633c-51a7-42a8-8357-a23ddbb791b9
connection.stable-id:                   --
connection.type:                        802-11-wireless
connection.interface-name:              --
connection.autoconnect:                 はい
connection.autoconnect-priority:        0
connection.autoconnect-retries:         -1 (default)
connection.multi-connect:               0 (default)
connection.auth-retries:                -1
connection.timestamp:                   1710955164
connection.read-only:                   いいえ
connection.permissions:                 --
connection.zone:                        --
connection.master:                      --
connection.slave-type:                  --
connection.autoconnect-slaves:          -1 (default)
connection.secondaries:                 --
connection.gateway-ping-timeout:        0
connection.metered:                     不明
connection.lldp:                        default
connection.mdns:                        -1 (default)
connection.llmnr:                       -1 (default)
connection.dns-over-tls:                -1 (default)
lines 1-24

Check IP address​

pi@raspberrypi:~ $ nmcli connection show <プロファイル名> | grep ipv4.addresses
ipv4.addresses:                         192.168.10.113/24

Set IP address​

In the example below, the IP address is set to 192.168.10.113 and the prefix length to 24.

sudo nmcli connection modify <プロファイル名> ipv4.addresses 192.168.10.113/24

Check DNS server​

pi@raspberrypi:~ $ nmcli connection show <プロファイル名> | grep ipv4.dns:
ipv4.dns:                               192.168.10.1

Set DNS server​

In the example below, the DNS server is set to 192.168.10.1.

sudo nmcli connection modify <プロファイル名> ipv4.dns 192.168.10.1

Disconnect a connection​

sudo nmcli connection down <プロファイル名>

Connect a connection​

sudo nmcli connection up <プロファイル名>

nmtui: Configure network connections with TUI​

sudo nmtui

This post introduces how to Japanese the Linux prompt.

1. Install Japanese Locale​

Next, if the Japanese locale does not exist, install it with the following command.

sudo apt update
sudo apt install language-pack-ja

2. Set the Locale​

Set the Japanese locale with the following command.

sudo update-locale LANG=ja_JP.UTF8

3. Restart the System​

Finally, restart the system. This will reflect the new locale settings.

sudo reboot

With the above steps, the Linux prompt will be Japanese.

This post explains how to localize the prompt on Raspberry Pi.

1. Setting the locale​

Set the Japanese locale. Execute the following commands:

1. Check the box as shown with a space and OK.
2. Select ja_JP.UTF-8 and OK.

sudo dpkg-reconfigure locales

# [*] ja_JP.UTF-8 UTF-8

2. Reboot​

Reboot the system.

sudo reboot

That's all.

Install Dependencies​

Reference: Home · pyenv/pyenv Wiki

sudo apt update
sudo apt install build-essential libssl-dev zlib1g-dev \
   libbz2-dev libreadline-dev libsqlite3-dev curl \
   libncursesw5-dev xz-utils tk-dev libxml2-dev libxmlsec1-dev libffi-dev lbmzma-dev

Install pyenv​

Reference: [pyenv/pyenv-installer: This tool is used to install pyenv and friends.] (https://github.com/pyenv/pyenv-installer?tab=readme-ov-file)

curl https://pyenv.run | bash

Add initialization script to ~/.bashrc​

# Open ~/.bashrc
code ~/.bashrc

Add the following:

export PYENV_ROOT="$HOME/.pyenv"
[[ -d $PYENV_ROOT/bin ]] && export PATH="$PYENV_ROOT/bin:$PATH"
eval "$(pyenv init -)"

eval "$(pyenv virtualenv-init -)"

Install Python​

Display a list of installable versions​

pyenv install -l

Install Python​

Install Python 3.12.2.

pyenv install 3.12.2

Set the Python version​

Set the default version to Python 3.12.2.

pyenv global 3.12.2

python -V # Python 3.12.2

Reference: Install .NET on Linux without using a package manager - .NET | Microsoft Learn

Download the install script​

wget https://dot.net/v1/dotnet-install.sh -O dotnet-install.sh

Make the install script executable​

chmod +x ./dotnet-install.sh

Install the dot.net SDK​

./dotnet-install.sh

To install the latest version​

./dotnet-install.sh --version latest

Add to path​

Open $HOME/.bashrc and add the following:

export DOTNET_ROOT=$HOME/.dotnet
export PATH=$PATH:$DOTNET_ROOT:$DOTNET_ROOT/tools

This is a translation of the Docker installation guide for Ubuntu.

[EOL]

1. Installing Docker Engine

   • Using Package Manager: This is the recommended method for most users.

     sudo apt-get update
     sudo apt-get install docker-ce docker-ce-cli containerd.io docker-compose-plugin
     

   • Using the Convenient Script: Docker provides a convenient script for quickly and non-interactively installing Docker in development environments. While not recommended for production, it can be useful for creating provisioning scripts tailored to your needs. Refer to the install using package repository instructions for installation steps using the repository. The script's source code is open source and available on the GitHub docker-install repository. Always review downloaded scripts before executing them.

     curl -fsSL https://get.docker.com -o get-docker.sh
     sudo sh get-docker.sh
     

   • Using Pre-release: Docker also provides a convenient script to install pre-releases of Docker on Linux, available at test.docker.com. This script configures the package manager to enable the "test" channel from which you can access early versions of new releases and test them in a non-production environment before they are released as stable.

     curl -fsSL https://test.docker.com -o test-docker.sh
     sudo sh test-docker.sh
     

   • Important: Before running the script, it's a good practice to preview the steps the script will execute by using the DRY_RUN=1 option.

     curl -fsSL https://get.docker.com -o get-docker.sh
     DRY_RUN=1 sh ./get-docker.sh
     

2. Post-Installation Steps

   • Non-root User Access: By default, users other than root cannot run Docker commands. To allow non-root users to run Docker, refer to the post-installation steps for Linux.
   • Rootless Mode: Docker can also be installed and run in rootless mode, which provides enhanced security. Refer to running the Docker daemon as a non-root user (rootless) for instructions.

3. Uninstalling Docker Engine

   • Uninstalling Packages:

     sudo apt-get purge docker-ce docker-ce-cli containerd.io docker-compose-plugin
     

   • Removing Images, Containers, and Volumes: The above command does not automatically remove images, containers, or volumes on the host. To remove all images, containers, and volumes, use the following commands:

     sudo rm -rf /var/lib/docker
     sudo rm -rf /var/lib/containerd
     

   • Manual Removal: Any manually created configuration files must be removed manually.

4. Next Steps

   • Post-installation steps for Linux
   • Developing with Docker

Ubuntu 22.04 seems to have the snap version of Firefox installed, and it wasn't launching in some environments, so I'm documenting how to install the pre-built Firefox.

Uninstall apt / snap version of Firefox​

sudo apt purge firefox
sudo snap remove firefox

Install Firefox Build​

# Download
wget "https://download.mozilla.org/?product=firefox-latest-ssl&os=linux64&lang=ja" --trust-server-names

# Extract
tar xvf firefox-*.tar.bz2

# Install
sudo cp -r firefox /usr/lib

# Create a symbolic link to the executable
sudo ln -s /usr/lib/firefox/firefox /usr/bin/firefox

# Download and place the desktop file
sudo mkdir -p /usr/share/applications
sudo wget https://bit.ly/3Mwigwx -O /usr/share/applications/firefox.desktop

This is useful when you want to configure the Dock with a script or when configuring via SSH.

Automatically hide the Dock​

Example: Automatically hide the Dock

# Current setting
$ gssettings get org.gnome.shell.extensions.dash-to-dock dock-fixed
true

$ gssettings set org.gnome.shell.extensions.dash-to-dock dock-fixed false

Panel Mode​

Stretches the Dock to the edge of the screen.

Example: Do not stretch the Dock

# Current setting
$ gssettings get org.gnome.shell.extensions.dash-to-dock extend-height
true

$ gssettings set org.gnome.shell.extensions.dash-to-dock extend-height false

Change Icon Size​

Example: Change icon size to 30

# Current setting
$ gssettings get org.gnome.shell.extensions.dash-to-dock dash-max-icon-size
48

$ gssettings set org.gnome.shell.extensions.dash-to-dock dash-max-icon-size 30

Change Dock Position​

Can set 'TOP' which cannot be set in "Settings". Creates a slight gap at the top.

Example: Set the Dock position to bottom

# Current setting
$ gssettings get org.gnome.shell.extensions.dash-to-dock dock-position
'LEFT'

$ gssettings set org.gnome.shell.extensions.dash-to-dock dock-position 'BOTTOM'

Show Trash​

Example: Hide the trash

# Current setting
$ gssettings get org.gnome.shell.extensions.dash-to-dock show-trash
true

$ gssettings set org.gnome.shell.extensions.dash-to-dock show-trash false