Cockpit is a web-based administration interface for Linux servers. Administrators use it to manage storage, networking, containers and logs in a browser instead of doing everything on the command line. It is server software: you install the package through your distribution's package manager, enable its socket and log in with a system user account. It is available for Fedora, RHEL, Debian, Ubuntu and openSUSE, among others, and a Flatpak client connects over SSH.
The project describes itself as a free-software project sponsored by Red Hat. Red Hat is based in Raleigh, United States, and has been part of IBM since 2019. Cockpit is released under LGPL-2.1 or later. The web service runs on the managed machine itself, so administration data stays on your own infrastructure.