command-not-found.com
Framework for Linux performance counter measurements. More information: <https://perf.wiki.kernel.org>.
Make a typescript file of a terminal session. More information: <https://manned.org/script>.
Compare files and directories. More information: <https://man7.org/linux/man-pages/man1/diff.1.html>.
Run a command with modified buffering operations for its standard streams. More information: <https://www.gnu.org/software/coreutils/stdbuf>.
Format stdin or a file into multiple columns. Columns are filled before rows; the default separator is a whitespace. More information: <https://manned.org/column>.
Disable devices and files for swapping. Note: path/to/file can either point to a regular file or a swap partition. More information: <https://manned.org/swapoff>.
CLI for AWS S3 - provides storage through web services interfaces. Some subcommands such as aws s3 cp have their own usage documentation. More information: <https://awscli.amazonaws.com/v2/documentation/api/latest/reference/s3/index.html>.
A documentation system for various programming languages. More information: <http://www.doxygen.nl>.