Linux Snippets

Mon, 01 Mar 2010 00:00:00 +0100

These are not only linux snippets but also bash snippets and snippets using tools that run under Linux, *nix or sometimes even MacOSX, I should reorder this article someday ;)

Settings for more reliable bash scripts

set -euo pipefail

this gives us …

-e: exit script if a single command fails
-u: exit script if an unset variable is used
-o pipefail: return value of a pipeline is the status of the last command to exit with a non-zero status, or zero if no command exited with a non-zero status

Python Snippets

Mon, 01 Mar 2010 00:00:00 +0100

Virtual Environments

Create and activate a venv

python -m venv /path/to/new-env (1)
source /path/to/new-env/bin/activate (2)

1	Creates a new virtual environment
2	Activate the new virtual environment

Deactivate venv

deactivate

Save used dependencies to a file

pip freeze > dependencies.txt

Install dependencies from file

pip install -r dependencies.txt

Storing and fetching Credentials from the System Keyring

I am using jaraco/keyring here:

pip install keyring

import keyring

keyring.set_password("system", "db.sample.password", "xoxo")

print(keyring.get_password("system", "db.sample.password"))

Credentials on Micha Kops' Tech Notes

Linux Snippets

Settings for more reliable bash scripts

Python Snippets

Virtual Environments

Storing and fetching Credentials from the System Keyring