Author: M15tak3(skyman.soul@gmail.com)

Linux Python Management (Installing and Using pyenv)

On newer Linux versions (for example, Ubuntu 24.04), using pip for system-level package management may trigger the externally-managed-environment error. In other words, the system does not allow direct global package installation with pip.

To avoid breaking the system Python environment and to manage Python versions more cleanly, I recommend using pyenv (plus virtual environments).

Install Build Dependencies

For Ubuntu/Debian:

sudo apt-get update; sudo apt-get install -y make build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm libncursesw5-dev xz-utils tk-dev libxml2-dev libxmlsec1-dev libffi-dev liblzma-dev

For CentOS and similar systems:

sudo yum install -y gcc zlib-devel bzip2 bzip2-devel readline-devel sqlite sqlite-devel openssl-devel xz xz-devel libffi-devel findutils

Install pyenv

Install via the official script:

curl https://pyenv.run | bash

Configure Your Shell and Apply

echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.bashrc
echo 'command -v pyenv >/dev/null || export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.bashrc
echo 'eval "$(pyenv init -)"' >> ~/.bashrc
 
# If you use Zsh, replace .bashrc with .zshrc

source ~/.bashrc
# If you use Zsh, replace .bashrc with .zshrc

# Verify
pyenv --version

Basic pyenv Usage

# pyenv install python-version, e.g. install 3.13.3
pyenv install 3.13.3

# pyenv global python-version, e.g. set global version to 3.13.3
pyenv global 3.13.3

# pyenv local python-version, e.g. set local project version to 3.13.3
cd my-project/
pyenv local 3.13.3

# pyenv shell python-version, e.g. set shell session version to 3.13.3
pyenv shell python-version

# pyenv virtualenv python-version myproject-env, e.g. create ctf env with 3.13.3
pyenv virtualenv 3.13.3 ctf

# pyenv activate myproject-env, e.g. activate ctf env
pyenv activate ctf

# pyenv deactivate, exit virtual environment
pyenv deactivate

Published on 2026-05-06 at M15tak3のBlog, last modified on 2026-05-06

All articles on this blog are licensed under the BY-NC-SA license agreement unless otherwise stated. Please indicate the source when reprinting!

Author: M15tak3(skyman.soul@gmail.com)

Installing WSL2 + Ubuntu from Scratch

Before You Start

You can think of WSL as a lightweight VM that gives much better local file interaction than VMware under Windows.

Note: after installing a Linux subsystem, if you later upgrade Windows from Home to Pro, subsystem file corruption can happen. Please keep backups.

Installing WSL

Enable Required Features

Open: Windows Settings -> System -> Optional features -> More Windows features

Enable Windows Subsystem for Linux and Virtual Machine Platform, then click OK. Windows will install these features and ask for a reboot.

Install WSL Ubuntu

Open a terminal and run:

wsl --install -d Ubuntu-22.04

The system will automatically pull Ubuntu 24.04 in this setup, so just wait for the progress to finish.

After installation, the subsystem starts automatically and asks you to create a username. Username rules vary slightly by distro; if your name is rejected, adjust it accordingly.

Move the Subsystem to Another Drive

By default, WSL installs distributions under drive C. If you want to move it, first run exit in the Linux shell.

Then shut down all WSL VMs and export the installed Ubuntu 22.04 for backup:

wsl --shutdown
wsl --export Ubuntu-22.04 E:\WSL\ubuntu2204.tar

You can choose your own path, but the exported file must end with .tar.

Now unregister the current distro and import it to your target location:

wsl --unregister Ubuntu-22.04
wsl --import Ubuntu-22.04 E:\WSL\Ubuntu2204 E:\WSL\ubuntu2204.tar
wsl -d Ubuntu-22.04

After that, the subsystem location is changed, and your files stay intact.

Published on 2026-05-06 at M15tak3のBlog, last modified on 2026-05-06

All articles on this blog are licensed under the BY-NC-SA license agreement unless otherwise stated. Please indicate the source when reprinting!