i3 (window manager)is a tiling window manager designed for X11, inspired by wmii and written in C.
Terminal multiplexeris a software application that can be used to multiplex several separate pseudoterminal-based login sessions inside a single terminal display, terminal emulator window, PC/workstation system console, or remote login session, or to detach and reattach sessions from a terminal.
BusyBoxis a software suite that provides several Unix utilities in a single executable file.
eBPFis a technology that can run sandboxed programs in a privileged context such as the operating system kernel.
Linux Standard Base (LSB)was a joint project by several Linux distributions under the organizational structure of the Linux Foundation to standardize the software system structure, including the Filesystem Hierarchy Standard.
Firejailis an easy to use Setuid sandbox program that reduces the risk of security breaches by restricting the running environment of untrusted applications using Linux namespaces, seccomp-bpf and Linux capabilities.
Firejailis a very easy to use piece of software, initially developed to make Firefox more secure by isolating it (putting it in a sandbox) from the rest of your system.