Section 1 of the manual describes user commands and tools, for example, file manipulation tools, shells, compilers, web browsers, file and image viewers and editors, and so on.

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autooptimiser
Optimize image positions
autoopts-config
script to get information about installed version of autoopts
autopep8
python3 autopep8.py - autopep8
autopkgtest-build-docker
autopkgtest-build-docker, autopkgtest-build-podman - Create or update autopkgtest image for autopkgtest-virt-docker, autopkgtest-virt-podman  
autopkgtest-build-lxc
Create or update autopkgtest container for autopkgtest-virt-lxc  
autopkgtest-build-lxd
Create or update autopkgtest container for autopkgtest-virt-lxd  
autopkgtest-build-podman
autopkgtest-build-docker, autopkgtest-build-podman - Create or update autopkgtest image for autopkgtest-virt-docker, autopkgtest-virt-podman  
autopkgtest-build-qemu
Create autopkgtest virtual machine images for autopkgtest-virt-qemu  
autopkgtest-buildvm-ubuntu-cloud
Create Ubuntu cloud image based VM for autopkgtest-virt-qemu  
autopkgtest-virt-chroot
autopkgtest virtualisation server using a chroot
autopkgtest-virt-docker
autopkgtest-virt-docker, autopkgtest-virt-podman - autopkgtest virtualisation server using Docker/Podman  
autopkgtest-virt-lxc
autopkgtest virtualisation server using LXC  
autopkgtest-virt-lxd
autopkgtest virtualisation server using LXD  
autopkgtest-virt-null
autopkgtest null virtualisation server
autopkgtest-virt-podman
autopkgtest-virt-docker, autopkgtest-virt-podman - autopkgtest virtualisation server using Docker/Podman  
autopkgtest-virt-qemu
autopkgtest virtualisation server using QEMU  
autopkgtest-virt-schroot
autopkgtest-schroot - autopkgtest virtualisation server using a schroot
autopkgtest-virt-ssh
autopkgtest virtualisation server using SSH  
autopkgtest-virt-unshare
autopkgtest using unshare user namespaces
autopkgtest
test an installed binary package using the source package's tests
autoplayerd
django_extensions - autoradio player daemon
autopoint
copies standard gettext infrastructure
autoproject
create a skeleton source package for a new program
autopsy
Autopsy Forensic Browser
autopvf
pvf tools - utilities to convert various sound formats  
autoradioctrl
django_extensions - autoradio controller tool
autoradiod
django_extensions - autoradiod daemon for autoradio suite
autoradiodbusd
django_extensions - autoradio dbus daemon
autoradioweb
django_extensions - autoradioweb daemon for autoradio suite
autorandr
automatically select a display configuration based on connected devices
autoreconf-dickey
autoreconf - Update generated configuration files
autoreconf
Update generated configuration files
autoreconf2.13
update configure scripts
autoreconf2.64
autoreconf2.69
autorenamer
program to rename files so they sort according to given ordering
autorevision
extract current-revision metadata from version-control repositories
autoscan-dickey
autoscan - Generate a preliminary configure.in
autoscan
Generate a preliminary configure.ac
autoscan2.13
help to create a configure.in file for a software package
autoscan2.64
autoscan - Generate a preliminary configure.in
autoscan2.69
autosp
preprocessor to generate note-spacing commands for MusiXTeX scores  
autossh-argv0
ssh-argv0 — replaces the old ssh command-name as hostname handling
autossh
monitor and restart ssh sessions
autosuspend
autosuspend Documentation
autoupdate-dickey
autoupdate - Update a configure.in to a newer Autoconf
autoupdate
Update a configure.ac to a newer Autoconf
autoupdate2.13
updates an old configure.in file to version 2
autoupdate2.64
autoupdate - Update a configure.in to a newer Autoconf
autoupdate2.69
autoupdate - Update a configure.in to a newer Autoconf
auwave
demonstrates the use of waveforms
aux2bib
AUX2BIB - Extracts a BibTeX database according to an aux file.  
av7110_loadkeys
a program to load keymaps
ava
AVA - Test runner for Node.js with a concise API Translations: Français
avahi-browse-domains
avahi-browse - Browse for mDNS/DNS-SD services using the Avahi daemon
avahi-browse
Browse for mDNS/DNS-SD services using the Avahi daemon
avahi-discover
Browse for mDNS/DNS-SD services using the Avahi daemon
avahi-publish-address
avahi-publish-service - Register an mDNS/DNS-SD service or host name or address mapping using the Avahi daemon
avahi-publish-service
Register an mDNS/DNS-SD service or host name or address mapping using the Avahi daemon
avahi-publish
service - Register an mDNS/DNS-SD service or host name or address mapping using the Avahi daemon
avahi-resolve-address
avahi-resolve - Resolve one or more mDNS/DNS host name(s) to IP address(es) (and vice versa) using the Avahi daemon
avahi-resolve-host-name
avahi-resolve - Resolve one or more mDNS/DNS host name(s) to IP address(es) (and vice versa) using the Avahi daemon
avahi-resolve
Resolve one or more mDNS/DNS host name(s) to IP address(es) (and vice versa) using the Avahi daemon
avahi-set-host-name
Change mDNS host name
avarice
Provides an interface from avr-gdb to Atmel's AVR in-circuit debugging tools
aven
sophisticated cave viewer for Unix and MS Windows
average
Average - Average or merge values in .ti3 like files
average_genome_size
Calculate the average genome size in Grinder libraries
average_genome_size
Calculate the average genome size (in bp) of species in a Grinder library
average_nucleotide_identity.py
average nucleotide identity
avibench
benchmarking tool
avicap
v4l capturing and PVR tool
avicat
cat tool for joining files
aview
A high quality ASCII art image viewer
avifdec
decompress an AVIF file to an image file
avifenc
compress an image file to an AVIF file
avifile-config
script to get information about the installed version of avifile
avimake
making tool
aviplay
QT-based movie player
avirec
video recording tool
avirecompress
video recompression tool
avitype
show video info
avobabel
utility for Avogadro2
avologin
clogin - Cisco login script
avr-addr2line
avr-ar
avr-as
avr-c++filt
avr-dlltool
avr-elfedit
avr-gdb-add-index
manual page for avr-gdb-add-index (GDB) 12.1
avr-gdb
manual page for avr-gdb (GDB) 12.1
avr-gprof
avr-ld
avr-ld.bfd
avr-man
a man(1) replacement to access the avr-libc manual pages
avr-nlmconv
avr-nm
avr-objcopy