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a2p:-  Awk to Perl translator.

abrt-action-trim-files:-     Deletes old problem directories or files in specified directories until they are smaller than specified size.

adduser:- create a new user or update default new user information.        

attr:- extended attributes on XFS filesystem objects

abrt-action-analyze-backtrace:-   Analyzes C/C++ backtrace, generates duplication hash, backtrace rating, and identifies crash function in problem directory.

abrt-auto-reporting:- Get or modify the auto reporting option values.                 

agetty:-   opens a tty port, prompts for a login name and invokes the /bin/login command. It is normally invoked by init(8).       

audispd:- is an audit event multiplexor. It has to be started by the audit daemon in order to get events. It takes audit events and distributes them to child programs that want to analyze events in realtime.

abrt-action-analyze-c:- The tool reads the file named coredump from a problem data directory, processes it and generates a universally unique identifier (UUID). Then it saves this data as new element uuid.               

abrt-cli:-         List, remove, print, analyze, report problems.                   

alias:-          

auditctl:- program is used to configure kernel options related to auditing, to see status of the configuration, and to load discretionary audit rules.

abrt-action-analyze-ccpp-local:-  This tool downloads debuginfo and generates a backtrace for coredump in the problem directory, also checks for existing duplicates in bugzilla and possible updates related to the detected crash

abrtd:- automated bug reporting tool's daemon.                               

alternatives:- maintain symbolic links determining default commands   

auditd:- Linux audit daemon, and auditd is  the  userspace component to the Linux Auditing System. It's responsible for writing audit records to the disk.

abrt-action-analyze-core:- The tool reads a core dump and extracts build ids of loaded modules and prints the list to the standard output if the OUTFILE file is not configured.          

abrt-dump-oops:-   This tool creates problem directory from, updates problem directory with or prints oops extracted from FILE or standard input.                    

anacron:- is  used to execute commands periodically, with a frequency specified in days.  Unlike cron(8), it does not assume that the machine is running continuously.  Hence, it can be used on machines that are not running 24 hours a day to control regular jobs as daily, weekly, and monthly jobs.       

augenrules:- is  a  script  that  merges  all component audit rules files, found in the audit rules directory, /etc/audit/rules.d, placing the merged file in /etc/audit/audit.rules.

abrt-action-analyze-oops:-     The tool reads the file named backtrace from a problem data directory, parses it as a kernel oops record and generates a duplication hash and a universally unique identifier (UUID). Then it saves this data as new elements duphash and uuid.        

abrt-dump-xorg:- This tool creates problem directory from or prints Xorg crash extracted from FILE or standard input.                     

applygnupgdefaults:- This  script is a wrapper around gpgconf to run it with the command --apply-defaults for all real users with an existing GnuPG home directory.     

aulast:- is  a  program that prints out a listing of the last logged in users similarly to the program last and lastb.

abrt-action-analyze-python:- Calculate and save UUID and duplicate hash for a problem data directory DIR with Python crash data.           

abrt-handle-upload:- The tool unpacks FILENAME located in UPLOAD_DIR and moves the problem data found in it to ABRT_DIR.                  

apropos:- search the manual page names and descriptions  Ex:- apropos network | more.      

aulastlog:- is a program that prints out the last login for all users of a machine similar to the way lastlog does. Ex:- aulastlog -u root.

abrt-action-analyze-vmcore:- Extracts the oops message from the kernel core and install the kernel debuginfo if needed         

abrt-harvest-pstoreoops:- Reconstruct oops from /sys/fs/pstore/* files, create ABRT problems and remove the files             

ar:- create, modify, and extract from archives             

aureport:- a tool that produces summary reports of audit daemon logs

abrt-action-analyze-vulnerability:- Provides assessment of potential exploitability of crash   

abrt-harvest-vmcore:- Converts VMCores to ABRT problems                 

arch:- print machine hardware name (same as uname -m)           

ausearch:- a tool to query audit daemon logs

abrt-action-analyze-xorg:- Calculate and save UUID and duplicate hash for a problem data directory DIR with Xorg backtrace.    

abrt-install-ccpp-hook:-  Install coredump handler.             

arp:- manipulate the system ARP cache            

ausyscall:- a program that allows mapping syscall names and numbers

abrt-action-check-oops-for-hw-error:- Checks dmesg element, marks problem as not-reportable if hardware error is detected

abrt-merge-pstoreoops:- Scans files for split oops message. Can print and/or delete them.               

arpd:- userspace arp daemon.           

authconfig:- provides a simple method of configuring /etc/sysconfig/net‐work to handle NIS, as well as /etc/passwd and /etc/shadow,  the  files used  for shadow password support.

abrt-action-generate-backtrace:- Analyzes coredump, generates and saves backtrace.      

abrt-server:- Unix socket for ABRT.                        

arping:-  send ARP REQUEST to a neighbour host       

authconfig-gtk:- system-config-authentication - GUI utility for config‐uring user identity and system authentication services

abrt-action-generate-core-backtrace:- Generates coredump-level backtrace

abrt-watch-log:- Watch log file and run command when it grows or is replaced                     

as:- the portable GNU assembler.            

authconfig-tui:- an  interface  for  configuring  system authentication resources.

abrt-action-install-debuginfo:- Install debuginfos for build-ids      

ac:- print statistics about users' connect time  Ex:- ac -p -d -y                                  

aserver:        

automount:- program  is used to manage mount points for autofs, the inlined  Linux   automounter.

abrt-action-list-dsos:-  The tool reads a file containing the mapped memory regions. Output is printed to stdout or file.              

accessdb:- will output the data contained within a man-db database  in  a human   readable  form.                            

at:- at,  batch,  atq, atrm - queue, examine or delete jobs for later execution            

autrace:- is  a program that will add the audit rules to trace a process similar to strace.

abrt-action-notify:- Announces a new occurrence of problem via all accessible channels                  

accton:- turns process accounting on or off                             

atd:- run jobs queued for later execution

auvirt:- shows  a  list  of guest sessions found in the audit logs. If a guest is specified, only the events related to that  guest  is  considered. To specify a guest, both UUID or VM name can be given.

abrt-action-perform-ccpp-analysis:- Allows users to select acceptable way of core dump analysis   

addgnupghome:- Create .gnupg home directories                        

atq:- at,  batch,  atq, atrm - queue, examine or delete jobs for later execution            

avahi-autoipd:- IPv4LL network address configuration daemon

abrt-action-save-kernel-data:- Creates uReport mandatory files for kernel oopses.

addpart:- simple wrapper around the "add partition" ioctl                             

atrm:- at,  batch,  atq, atrm - queue, examine or delete jobs for later execution           

avcstat:- Display SELinux AVC statistics

abrt-action-save-package-data:- Query package database and save package and component name.      

addr2line:- convert addresses into file names and line numbers.                           

atrun:- run jobs queued for later execution          

awk:- pattern scanning and processing language.