# Cheatsheet

Some useful commands for development and testing.

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## Certificates

Following commands require `OpenSSL` to be installed. It is provided as `openssl` package in Arch Linux.

Generate self-signed TLS certificate:

    openssl req -x509 -newkey rsa:4096 -sha256 -days 365 -noenc \
    -keyout certs/xmpp.key -out certs/xmpp.pem \
    -subj "/CN=example.com"

Print content of a TLS certificate:

    openssl x509 -in certs/xmpp.pem -text