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Ultimate List of Linux bash commands
Bash is the Unix command-line interface (CLI). Also called the terminal, the command line, or the shell. It's a command language that allows us to work with files on our computers in a way that's far more efficient and powerful than using a GUI (graphical user interface).
A to Z command list 
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Table
│ A │ B │ C │ D │ E │ F │ G │ H │ I │ J │ K │ L │ M │ N │ O │ P │ Q │ R │ S │ T │ U │ V │ W │ X │ Y │ Z │
A
| Command | Description |
|---|---|
| accept | Accept or Reject jobs to a destination, such as a printer. |
| access | Check a user’s RWX(read, write and execute) permission for a file. |
| accton | Used to turn on or turn off the process for accounting or change info process accounting file. |
| aclocal | Used to automatically generate aclocal.m4 files from configure.in file. |
| aconnect | ALSA(Advanced Linux Sound Architecture) sequencer connection manager. |
| acpi | Show information about the Advanced Configuration and Power Interface. |
| acpi_available | Check if ACPI(Advanced Configuration and Power Interface) functionality exists on the system. |
| acpid | Informs user-space programs about ACPI events. |
| addr2line | Used to convert addresses into file names and line numbers. |
| addresses | Formats for internet mail addresses. |
| agetty | An alternative Linux Getty that manages physical or virtual terminals to allow multi-user access |
| alias | Create an alias, a shortcut that references a command. |
| alsactl | Access advanced controls for ALSA soundcard driver. |
| amidi | Perform read/write operation for ALSA RawMIDI ports. |
| amixer | Access CLI-based mixer for ALSA soundcard driver. |
| anacron | Used to run commands periodically. |
| aplay | Sound recorder and player for CLI. |
| aplaymidi | CLI utility used to play MIDI files. |
| apm | Show Advanced Power Management (APM) hardware info on older systems. |
| apmd | Used to handle events reported by APM BIOS drivers. |
| apropos | Shows the list of all man pages containing a specific keyword. |
| apt | Advanced Package Tool, a package management system for Debian and derivatives. |
| apt-get | Command-line utility to install/remove/update packages based on APT system. |
| aptitude | Another utility to add/remove/upgrade packages based on the APT system. |
| ar | A utility to create/modify/extract from archives. |
| arch | Display print machine hardware name. |
| arecord | Just like aplay, it’s a sound recorder and player for ALSA soundcard driver. |
| arecordmidi | Record standard MIDI files. |
| arp | Used to make changes to the system’s ARP cache. |
| as | A portable GNU assembler. |
| aspell | An interactive spell checker utility. |
| at | Used to schedule command execution at specified date & time, reading commands from an input file. |
| atd | Used to execute jobs queued by the at command. |
| atq | List a user’s pending jobs for the at command. |
| atrm | Delete jobs queued by the at command. |
| audiosend | Used to send an audio recording as an email. |
| aumix | An audio mixer utility. |
| autoconf | Generate configuration scripts from a TEMPLATE-FILE and send the output to standard output. |
| autoheader | Create a template header for configure. |
| automake | Creates GNU standards-compliant Makefiles from template files. |
| autoreconf | Update generated configuration files. |
| autoscan | Generate a preliminary configure.in file. |
| autoupdate | Update a configure.in file to newer autoconf. |
| awk | A scripting language used for manipulating data and generating reports. Also used to find and replace text in a file(s). |
B
| Command | Description |
|---|---|
| badblocks | Search a disk partition for bad sectors. |
| banner | Used to print characters as a poster. |
| basename | Used to display filenames with directory or suffix. |
| bash | GNU Bourne-Again Shell. |
| batch | Used to run commands entered on a standard input. |
| bc | Access the GNU bc calculator utility. |
| bg | Send processes to the background. |
| biff | Notify about incoming mail and sender’s name on a system running comsat server. |
| bind | Used to attach a name to a socket. |
| bison | A GNU parser generator, compatible with yacc. |
| break | Used to exit from a loop (eg: for, while, select). |
| builtin | Used to run shell builtin commands, make custom functions for commands extending their functionality. |
| bzcmp | Used to call the cmp program forbzip2 compressed files. |
| bzdiff | Used to call the diff program for bzip2 compressed files. |
| bzgrep | Used to call grep for bzip2 compressed files. |
| bzip2 | A block-sorting file compressor used to shrink given files. |
| bzless | Used to apply ‘less’ (show info one page at a time) to bzip2 compressed files. |
| bzmore | Used to apply ‘more’ (an inferior version of less) to bzip2 compressed files. |
C
| Command | Description |
|---|---|
| cal | Show calendar. |
| cardctl | Used to control PCMCIA sockets and select configuration schemes. |
| cardmgr | Keeps an eye on the added/removes sockets for PCMCIA devices. |
| case | Execute a command conditionally by matching a pattern. |
| cat | Used to concatenate files and print them on the screen. |
| cc | GNU C and C++ compiler. |
| ccrypt | Used for encryption and decryption of data. |
| cd | Used to change directory. |
| cdda2wav | Used to rip a CD-ROM and make WAV |
