Vivek Shukla - Cheatsheet

UFW Cheat Sheet

2025-09-09T00:00:00+00:00

sudo</span> ufw status</span></span>
</span>
# or</span></span>
</span>
sudo</span> ufw status verbose</span></span>
</span>
# or</span></span>
</span>
sudo</span> ufw status numbered</span></span></code></pre>🔗</a>Delete value based on number:</h2>
sudo</span> ufw delete</span> 5</span></span></code></pre>🔗</a>Allow port</h2>
sudo</span> ufw allow 22/tcp</span></span></code></pre>🔗</a>Deny port</h2>
sudo</span> ufw deny 80/tcp</span></span></code></pre>🔗</a>Allow from ip address or subnet</h2>
sudo</span> ufw allow from 10.22.96.0/20</span></span></code></pre>🔗</a>Allow from ip address to specific port</h2>
sudo</span> ufw allow from 10.22.96.0/20 proto tcp to any port</span> 5432</span></span></code></pre>🔗</a>Disable ufw</h2>
sudo</span> ufw disable</span></span></code></pre>🔗</a>Block an ip address or subnet</h2>
sudo</span> ufw deny from</span> 203.0.113.100</span></span></code></pre>🔗</a>Delete a rule</h2>
sudo</span> ufw delete allow from</span> 203.0.113.101</span></span></code></pre>🔗</a>Allow incoming connection to a network interface</h2>
sudo</span> ufw allow in on eth0 from</span> 203.0.113.102</span></span></code></pre>


Python Poetry Cheat Sheet
2023-10-30T00:00:00+00:00
Poetry is an amazing tool for dependancy management in Python, it solves a lot of problems of pip. Here in this Poetry Cheat Sheet we have useful commands that we may need frequently.</p>
🔗</a>Initializing</h2>
🔗</a>New Project</h3>
poetry</span> new poetry-demo</span></span></code></pre>🔗</a>In Pre-existing Directory</h3>
cd</span> pre-existing-project</span></span>
poetry</span> init</span></span></code></pre>🔗</a>Environments</h2>
🔗</a>Displaying the environment information</h3>
poetry</span> env info</span></span></code></pre>🔗</a>Using your own virtual environment</h3>
Keep virtualenv in project root</strong></p>
More on this here</a>.</p>
This will also let VS Code discover your porject’s virtual env.</p>
poetry</span> config virtualenvs.in-project</span> true</span> --local</span></span></code></pre>
External virtual environment management</strong></p>
Poetry will detect and respect an existing virtual environment that has been externally activated. This is a powerful mechanism that is intended to be an alternative to Poetry’s built-in, simplified environment management.</p>
You can use pyenv</a> to create external virtual environment.</p>
🔗</a>Switching between environments</h3>
poetry</span> env use /full/path/to/python</span></span></code></pre>poetry</span> env use</span> 3.7</span></span></code></pre>poetry</span> env use system</span></span></code></pre>🔗</a>Listing the environments associated with the project</h3>
poetry</span> env list</span></span></code></pre>🔗</a>Deleting the environments</h3>
poetry</span> env remove /full/path/to/python</span></span>
poetry</span> env remove python3.7</span></span>
poetry</span> env remove</span> 3.7</span></span>
poetry</span> env remove test-O3eWbxRl-py3.7</span></span></code></pre>
Use the --all</code></strong> option to delete all virtual environments at once.</p>
poetry</span> env remove</span> --all</span></span></code></pre>🔗</a>Dependencies</h2>
🔗</a>Add new dependency</h3>
poetry</span> add</span> <</span>package nam</span>e</span>></span></span></code></pre>🔗</a>Removing dependency</h3>
poetry</span> remove</span> <</span>package nam</span>e</span>></span></span></code></pre>🔗</a>Installing dependencies</h3>
poetry</span> install</span></span></code></pre>🔗</a>Updating dependencies to their latest versions</h3>
This will fetch the latest matching versions (according to your pyproject.toml</code></strong> file) and update the lock file with the new versions. (This is equivalent to deleting the poetry.lock</code></strong> file and running install</code></strong> again.)</p>
poetry</span> update</span></span></code></pre>🔗</a>Adding a dependency to a group</h3>
poetry</span> add pytest</span> --group</span> test</span></span></code></pre>poetry</span> add isort</span> --group</span> dev</span></span></code></pre>🔗</a>Installing group dependencies</h3>
without</code></p>
poetry</span> install</span> --without</span> test, docs</span></span></code></pre>
with</code></p>
poetry</span> install</span> --with</span> docs</span></span></code></pre>
only</code></p>
poetry</span> install</span> --only</span> main</span></span></code></pre>🔗</a>Removing dependencies from a group</h3>
poetry</span> remove mkdocs</span> --group</span> docs</span></span></code></pre>🔗</a>Synchronizing dependencies</h3>
Poetry supports what’s called dependency synchronization. Dependency synchronization ensures that the locked dependencies in the poetry.lock</code></strong> file are the only ones present in the environment, removing anything that’s not necessary.</p>
poetry</span> install</span> --sync</span></span></code></pre>poetry</span> install</span> --without</span> dev</span> --sync</span></span>
poetry</span> install</span> --with</span> docs</span> --sync</span></span>
poetry</span> install</span> --only</span> dev</span></span></code></pre>🔗</a>Export</h2>
poetry</span> export</span> -f</span> requirements.txt</span> --output</span> requirements.txt</span></span></code></pre>


--format (-f)</code></strong>: The format to export to (default: requirements.txt</code></strong>). Currently, only constraints.txt</code></strong> and requirements.txt</code></strong> are supported.</p>
</li>

--output (-o)</code></strong>: The name of the output file. If omitted, print to standard output.</p>
</li>

--extras (-E)</code></strong>: Extra sets of dependencies to include.</p>
</li>

--without</code></strong>: The dependency groups to ignore.</p>
</li>

--with</code></strong>: The optional dependency groups to include.</p>
</li>

--only</code></strong>: The only dependency groups to include.</p>
</li>

--without-hashes</code></strong>: Exclude hashes from the exported file.</p>
</li>

--without-urls</code></strong>: Exclude source repository urls from the exported file.</p>
</li>

--with-credentials</code></strong>: Include credentials for extra indices.</p>
</li>
</ul>
🔗</a>Packaging</h2>
🔗</a>Build</h3>
poetry</span> build</span></span></code></pre>🔗</a>Publish</h3>
poetry</span> publish</span></span></code></pre>🔗</a>Configuration</h2>
You can find all the configuration options here</a>.</p>


pyenv Cheat Sheet
2023-10-22T00:00:00+00:00
Here is the pyenv cheat sheet of all the basic commands list.</p>
🔗</a>What is pyenv</h2>
pyenv is Python</a> version management tool, it lets you easily switch between multiple versions of Python.</p>
🔗</a>What it does</h2>


Lets you change the global Python version on a per-user basis.</p>
</li>

Provides support for per-project Python versions.</p>
</li>

Allows you to override the Python version with an environment variable.</p>
</li>
</ul>
🔗</a>List available python versions to install</h2>
This will list all the available version of python</p>
pyenv</span> install</span> --list</span></span></code></pre>
You can filter it using grep. Here we are filtering list by python version:</p>
pyenv</span> install</span> --list</span> |</span> grep</span> " 3\.11"</span></span></code></pre>🔗</a>Installing Python Version</h2>
pyenv</span> install</span> <</span>versio</span>n</span>></span></span></code></pre>
add -v</code> flag to see install progress output</p>
🔗</a>List Installed Python Versions</h2>
pyenv</span> versions</span></span></code></pre>
Astrick (*) indicate current active version.</p>
🔗</a>See List Of All pyenv Commands</h2>
pyenv</span> commands</span></span></code></pre>🔗</a>Activating Python Version</h2>
🔗</a>global</h3>


Sets the given version as global python version.</p>
</li>

It overrides system’s default python version.</p>
</li>
</ul>
pyenv</span> global</span> <</span>versio</span>n</span>></span></span></code></pre>🔗</a>local</h3>


Use it to set directory / project specific python version.</p>
</li>

It can override python version set by global</code></p>
</li>
</ul>
pyenv</span> local</span> <</span>versio</span>n</span>></span></span></code></pre>🔗</a>shell</h3>


Sets shell specific python version.</p>
</li>

The python version stays active until shell has been closed or by using --unset</code> flag.</p>
</li>

It can override python version set by local</code> and global</code></p>
</li>
</ul>
pyenv</span> shell</span> <</span>versio</span>n</span>></span></span></code></pre>🔗</a>Virtual Environments</h2>
🔗</a>Create Virtual Environments</h3>
pyenv</span> virtualenv</span> <</span>versio</span>n</span>> <</span>env_nam</span>e</span>></span></span></code></pre>🔗</a>Set virtual environment as default for dir/project</h3>
pyenv</span> local</span> <</span>env_nam</span>e</span>></span></span></code></pre>🔗</a>Activate Virtual Environment</h3>
pyenv</span> activate</span> <</span>env_nam</span>e</span>></span></span></code></pre>🔗</a>Deactivate Virtual Environment</h3>
pyenv</span> deactivate</span></span></code></pre>🔗</a>Recommended Reading Materials</h2>


Official Page of pyenv</a></p>
</li>

Real Python: Managing Multiple Python Versions With pyenv</a></p>
</li>
</ul>

`🔗</a>Packaging</h2> 🔗</a>Build</h3> poetry</span> build</span></span></code></pre>🔗</a>Publish</h3> poetry</span> publish</span></span></code></pre>🔗</a>Configuration</h2> You can find all the configuration options here</a>.</p>`

🔗</a>Build</h3>
`poetry</span> build</span></span></code></pre>`
🔗</a>Publish</h3>
`poetry</span> publish</span></span></code></pre>`
🔗</a>Configuration</h2>
You can find all the configuration options here</a>.</p>

🔗</a>Publish</h3>
`poetry</span> publish</span></span></code></pre>`
🔗</a>Configuration</h2>
You can find all the configuration options here</a>.</p>

🔗</a>Configuration</h2>
You can find all the configuration options here</a>.</p>

🔗</a>What is pyenv</h2>
pyenv is Python</a> version management tool, it lets you easily switch between multiple versions of Python.</p>

🔗</a>Deactivate Virtual Environment</h3>
`pyenv</span> deactivate</span></span></code></pre>`
🔗</a>Recommended Reading Materials</h2>

Official Page of pyenv</a></p> </li>

Real Python: Managing Multiple Python Versions With pyenv</a></p> </li> </ul>

🔗</a>Recommended Reading Materials</h2>

Official Page of pyenv</a></p> </li>

Real Python: Managing Multiple Python Versions With pyenv</a></p> </li> </ul>

Vivek Shukla - Cheatsheet

UFW Cheat Sheet

🔗</a>Delete a rule</h2>
`sudo</span> ufw delete allow from</span> 203.0.113.101</span></span></code></pre>`
🔗</a>Allow incoming connection to a network interface</h2>
`sudo</span> ufw allow in on eth0 from</span> 203.0.113.102</span></span></code></pre>`

🔗</a>Allow incoming connection to a network interface</h2>
`sudo</span> ufw allow in on eth0 from</span> 203.0.113.102</span></span></code></pre>`

Python Poetry Cheat Sheet

pyenv Cheat Sheet