command-not-found.com
List directory contents. More information: <https://www.gnu.org/software/coreutils/ls>.
Command-line email client. More information: <http://mutt.org>.
Bourne shell, the standard command language interpreter. See also histexpand for history expansion. More information: <https://manned.org/sh>.
Monitor I/O latency in real time. More information: <https://github.com/koct9i/ioping>.
Evaluate expressions and manipulate strings. More information: <https://www.gnu.org/software/coreutils/expr>.
A server application that can be used to distribute e-books over a network. Note: e-books must already be imported into the library using the GUI or the calibredb CLI. More information: <https://manual.calibre-ebook.com/generated/en/calibre-server.html>.
Send kill signal to all instances of a process by name (must be exact name). All signals except SIGKILL and SIGSTOP can be intercepted by the process, allowing a clean exit. More information: <https://manned.org/killall>.
A high-level, high-performance dynamic programming language for technical computing. More information: <https://docs.julialang.org/en/v1/manual/getting-started/>.