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gpg

GNU Privacy Guard. See gpg2 for GNU Privacy Guard 2. Most operating systems symlink gpg to gpg2. More information: <https://gnupg.org>.

csvgrep

Filter CSV rows with string and pattern matching. Included in csvkit. More information: <https://csvkit.readthedocs.io/en/latest/scripts/csvgrep.html>.

losetup

Set up and control loop devices. More information: <https://manned.org/losetup>.

pulseaudio

The PulseAudio sound system daemon and manager. More information: <https://www.freedesktop.org/wiki/Software/PulseAudio/>.

cpufreq-set

A tool to modify CPU frequency settings. The frequency value should range between the output of command cpufreq-info -l. More information: <https://manned.org/cpufreq-set>.

journalctl

Query the systemd journal. More information: <https://manned.org/journalctl>.

gdb

The GNU Debugger. More information: <https://www.gnu.org/software/gdb>.

chgrp

Change group ownership of files and directories. More information: <https://www.gnu.org/software/coreutils/chgrp>.