apt-cache
Debian and Ubuntu package query tool.
apt-add-repository
Manage apt repository definitions.
apt
apport-bug
File a bug report on Ubuntu.
aplay
Sound player for ALSA soundcard driver.
apk
Alpine Linux package management tool.
apache2ctl
Administrate the Apache HTTP web server.This command comes with Debian based OSes, for RHEL based ones see httpd.
httpd
anbox
Run Android applications on any Linux operating system.
amixer
Mixer for ALSA soundcard driver.
alternatives
This command is an alias of update-alternatives.
update-alternatives
alpine
An email client and Usenet newsgroup program with a pico/nano-inspired interface.Supports most modern email services through IMAP.
alien
Convert different installation packages to other formats.See also: debtap, for .deb conversion on Arch Linux.
debtap
.deb
ahost
DNS lookup utility to display the A or AAAA record linked with a hostname or IP address.
agetty
Alternative getty: Open a tty port, prompt for a login name, and invoke the /bin/login command.It is normally invoked by init.Note: the baud rate is the speed of data transfer between a terminal and a device over a serial connection.
getty
tty
/bin/login
init
adig
Print information received from Domain Name System (DNS) servers.
adduser
User addition utility.
addr2line
Convert addresses of a binary into file names and line numbers.
addpart
Tell the Linux kernel about the existence of the specified partition.A simple wrapper around the add partition ioctl.
add partition
add-apt-repository
acpi
Shows battery status or thermal information.
acountry
Print the country where an IPv4 address or hostname is located.