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Archiving

Shar utilities: Shell archiver, uuencode/uudecode.

Basics

Bash: The GNU Bourne-Again SHell.
Common options
Coreutils: Core GNU (file, text, shell) utilities.
Date input formats
Ed: The GNU line editor
File permissions: Access modes.
Finding files: Operating on files matching certain criteria.
Time: time

C++ libraries

autosprintf: Support for printf format strings in C++.

Compression

Gzip: General (de)compression of files (lzw).
Lzip: LZMA lossless data compressor

Development

Com_err: A Common Error Description Library for UNIX.
SSIP: Speech Synthesis Interface Protocol.
Speech Dispatcher: Speech Dispatcher.
bzip2 and libbzip2, version 1.0.8: A program and library for data compression
fftw3: FFTW User's Manual.
libffi: Portable foreign function interface library.

Editors

nano: Small and friendly text editor.

Emacs

IDN Library: Emacs API for IDN functions.

Email

Mailutils: GNU Mail Utilities.

Encryption

Nettle: A low-level cryptographic library.

GNU Ada Tools

GNAT Reference Manual: Reference Manual for GNU Ada tools.
gnat_ugn: gnat_ugn

GNU Gettext Utilities

autopoint: Copy gettext infrastructure.
envsubst: Expand environment variables.
gettextize: Prepare a package for gettext.
gettext: GNU gettext utilities.
ISO3166: ISO 3166 country codes.
ISO639: ISO 639 language codes.
msgattrib: Select part of a PO file.
msgcat: Combine several PO files.
msgcmp: Compare a PO file and template.
msgcomm: Match two PO files.
msgconv: Convert PO file to encoding.
msgen: Create an English PO file.
msgexec: Process a PO file.
msgfilter: Pipe a PO file through a filter.
msgfmt: Make MO files out of PO files.
msggrep: Select part of a PO file.
msginit: Create a fresh PO file.
msgmerge: Update a PO file from template.
msgunfmt: Uncompile MO file into PO file.
msguniq: Unify duplicates for PO file.
ngettext: Translate a message with plural.
xgettext: Extract strings into a PO file.

GNU libraries

gmp: GNU Multiple Precision Arithmetic Library.

GNU Libraries

libgcrypt: Cryptographic function library.
x86_64-linux-gnu-libgomp-10: GNU Offloading and Multi Processing Runtime Library.
x86_64-linux-gnu-libgomp-11: GNU Offloading and Multi Processing Runtime Library.
{No value for 'fnlibquadmath'}: ({No value for `fnlibquadmath'}).

GNU organization

Maintaining: Maintaining GNU software.
Maintaining Findutils: Maintaining GNU findutils
Standards: GNU coding standards.

GNU Packages

Aspell: GNU Aspell spelling checker
Aspell-dev: For Aspell developers

GNU Utilities

dirmngr: X.509 CRL and OCSP server.
dirmngr-client: X.509 CRL and OCSP client.
gpg-agent: The secret key daemon.
gpg2: OpenPGP encryption and signing tool.
gpgsm: S/MIME encryption and signing tool.
pinentry: Securely ask for a passphrase or PIN.

Individual utilities

aclocal-invocation: Generating aclocal.m4.
addr2line: Convert addresses to file and line.
ar: Create, modify, and extract from archives.
arch: Print machine hardware name.
autoconf-invocation: How to create configuration scripts
autoheader: How to create configuration templates
autom4te: The Autoconf executables backbone
automake-invocation: Generating Makefile.in.
autoreconf: Remaking multiple ‘configure’ scripts
autoscan: Semi-automatic ‘configure.ac’ writing
autoupdate: Automatic update of ‘configure.ac’
b2sum: Print or check BLAKE2 digests.
base32: Base32 encode/decode data.
base64: Base64 encode/decode data.
basename: Strip directory and suffix.
basenc: Encoding/decoding of data.
bibtex: Maintaining bibliographies.
c++filt: Filter to demangle encoded C++ symbols.
cat: Concatenate and write files.
chcon: Change SELinux CTX of files.
chgrp: Change file groups.
chmod: Change access permissions.
chown: Change file owners and groups.
chroot: Specify the root directory.
cksum: Print POSIX CRC checksum.
cmp: Compare 2 files byte by byte.
comm: Compare sorted files by line.
comsatd: Comsat Daemon.
config.status: status Invocation. Recreating configurations.
configure: Configuring a package.
cp: Copy files.
csplit: Split by context.
cut: Print selected parts of lines.
cxxfilt: MS-DOS name for c++filt.
date: Print/set system date and time.
dd: Copy and convert a file.
decodemail: Decode MIME messages.
df: Report file system disk usage.
diff: Compare 2 files line by line.
diff3: Compare 3 files line by line.
dir: List directories briefly.
dircolors: Color setup for ls.
dirname: Strip last file name component.
dlltool: Create files needed to build and use DLLs.
du: Report on disk usage.
dvicopy: Virtual font expansion
dvitomp: DVI to MPX (MetaPost pictures).
dvitype: DVI to human-readable text.
echo: Print a line of text.
elfedit: Update ELF header and property of ELF files.
env: Modify the environment.
expand: Convert tabs to spaces.
expr: Evaluate expressions.
factor: Print prime factors
false: Do nothing, unsuccessfully.
find: Finding and acting on files.
fmt: Reformat paragraph text.
fold: Wrap long input lines.
frm: List Headers from a Mailbox.
gftodvi: Generic font proofsheets.
gftopk: Generic to packed fonts.
gftype: GF to human-readable text.
groups: Print group names a user is in.
guimb: Mailbox Processing Language.
gunzip: Decompression.
gzexe: Compress executables.
head: Output the first part of files.
hostid: Print numeric host identifier.
hostname: Print or set system name.
id: Print user identity.
ifnames: Listing conditionals in source.
imap4d: IMAP4 Daemon.
install: Copy files and set attributes.
install-tl: Installing TeX Live.
join: Join lines on a common field.
kill: Send a signal to processes.
libtool-invocation: Running the 'libtool' script.
libtoolize: Adding libtool support.
link: Make hard links between files.
ln: Make links between files.
locate: Finding files in a database.
logname: Print current login name.
ls: List directory contents.
maidag: A General-Purpose Mail Delivery Agent.
mail: Send and Receive Mail.
mailutils: Mailutils Multi-Purpose Tool
md5sum: Print or check MD5 digests.
messages: Count Messages in a Mailbox.
mf: Creating typeface families.
mft: Prettyprinting Metafont source.
mimeview: View MIME Messages.
mkdir: Create directories.
mkfifo: Create FIFOs (named pipes).
mknod: Create special files.
mktemp: Create temporary files.
mltex: Multi-lingual TeX.
movemail: Move Mail between Mailboxes.
mpost: Generating PostScript.
mv: Rename files.
nice: Modify niceness.
nl: Number lines and write files.
nm: List symbols from object files.
nohup: Immunize to hangups.
nproc: Print the number of processors.
numfmt: Reformat numbers.
objcopy: Copy and translate object files.
objdump: Display information from object files.
od: Dump files in octal, etc.
paste: Merge lines of files.
patch: Apply a patch to a file.
patgen: Creating hyphenation patterns.
pathchk: Check file name portability.
pktogf: Packed to generic fonts.
pktype: PK to human-readable text.
pltotf: Property list to TFM.
pooltype: Display WEB pool files.
pop3d: POP3 Daemon.
pr: Paginate or columnate files.
printenv: Print environment variables.
printf: Format and print data.
ptx: Produce permuted indexes.
pwd: Print working directory.
ranlib: Generate index to archive contents.
readelf: Display the contents of ELF format files.
readlink: Print referent of a symlink.
readmsg: Extract Messages from a Folder.
realpath: Print resolved file names.
rm: Remove files.
rmdir: Remove empty directories.
runcon: Run in specified SELinux CTX.
sdiff: Merge 2 files side-by-side.
seq: Print numeric sequences
sha1sum: Print or check SHA-1 digests.
sha2: Print or check SHA-2 digests.
shar: Make a shell archive.
shred: Remove files more securely.
shuf: Shuffling text files.
sieve: Mail Filtering Utility.
size: List section sizes and total size.
sleep: Delay for a specified time.
sort: Sort text files.
split: Split into pieces.
stat: Report file(system) status.
stdbuf: Modify stdio buffering.
strings: List printable strings from files.
strip: Discard symbols.
stty: Print/change terminal settings.
sum: Print traditional checksum.
sync: Synchronize memory to disk.
tac: Reverse files.
tail: Output the last part of files.
tangle: WEB to Pascal.
tee: Redirect to multiple files.
test: File/string tests.
testsuite: Running an Autotest test suite.
tex: Typesetting.
tftopl: TFM -> property list.
timeout: Run with time limit.
tlmgr: Managing TeX Live.
touch: Change file timestamps.
tr: Translate characters.
true: Do nothing, successfully.
truncate: Shrink/extend size of a file.
tsort: Topological sort.
tty: Print terminal name.
uname: Print system information.
unexpand: Convert spaces to tabs.
uniq: Uniquify files.
unlink: Removal via unlink(2).
unshar: Explode a shell archive.
updatedb: Building the locate database.
uptime: Print uptime and load.
users: Print current user names.
uudecode: Restore file from 7-bits.
uuencode: Force binary file to 7-bits.
vdir: List directories verbosely.
vftovp: Virtual font -> virtual pl.
vptovf: Virtual pl -> virtual font.
wc: Line, word, and byte counts.
weave: WEB to TeX.
who: Print who is logged in.
whoami: Print effective user ID.
windmc: Generator for Windows message resources.
windres: Manipulate Windows resources.
xargs: Operating on many files.
yes: Print a string indefinitely.
zcat: Decompression to stdout.
zdiff: Compare compressed files.
zforce: Force .gz extension on files.
zgrep: Search compressed files.
zmore: Decompression output by pages.

Kernel

grub-dev: The GRand Unified Bootloader Dev
grub-install: Install GRUB on your drive
grub-mkconfig: Generate GRUB configuration
grub-mkpasswd-pbkdf2
grub-mkrelpath
grub-mkrescue: Make a GRUB rescue image
grub-mount: Mount a file system using GRUB
grub-probe: Probe device information
grub-script-check
GRUB: The GRand Unified Bootloader

Libraries

History: The GNU history library API.
RLuserman: The GNU readline library User's Manual.
Readline: The GNU readline library API.

Libraries:

LibGTop2: Library to get system specific data such as cpu and memory usage, active processes

Localization

idn: Internationalized Domain Name (IDN) string conversion.
idn2: Internationalized Domain Name (IDNA2008/TR46) conversion.

Man-pages

Latex2man: Its Man-Page

Math

GNUPLOT: An Interactive Plotting Program
bc: An arbitrary precision calculator language.

Miscellaneous

Gpm: Text-mode (non-X) mouse library and server daemon.
Python 3.10: One line description of project
dc: Arbitrary precision RPN "Desktop Calculator".
libgccjit: GCC-based Just In Time compiler library.
mpi4py: MPI for Python.

Network applications

Wget: Non-interactive network downloader.

Programming

flex: Fast lexical analyzer generator (lex replacement).

Security

gsasl: Command line interface to GNU SASL.

Software development

As: The GNU assembler.
Autoconf: Create source code configuration scripts.
Autoconf Archive: A collection of re-usable Autoconf macros.
Automake: Making GNU standards-compliant Makefiles.
Automake-history: History of Automake development.
Bfd: The Binary File Descriptor library.
Binutils: The GNU binary utilities.
CTF: The CTF file format.
Gas: The GNU assembler.
Ld: The GNU linker.
Libtool: Generic shared library support script.
g++: The GNU C++ compiler.
gcc: The GNU Compiler Collection.
gcov: 'gcov'--a test coverage program.
gcov-dump: 'gcov-dump'--an offline gcda and gcno profile dump tool.
gcov-tool: 'gcov-tool'--an offline gcda profile processing program.
gnat-style: GNAT Coding Style
gprof: Profiling your program's execution
lto-dump: 'lto-dump'--Tool for dumping LTO object files.
x86_64-linux-gnu-cpp-11: The GNU C preprocessor.
x86_64-linux-gnu-cppinternals-11: Cpplib internals.
x86_64-linux-gnu-gccgo-11: A GCC-based compiler for the Go language
x86_64-linux-gnu-gccint-10: Internals of the GNU Compiler Collection.
x86_64-linux-gnu-gccint-11: Internals of the GNU Compiler Collection.
x86_64-linux-gnu-gfortran-11: The GNU Fortran Compiler.

Software libraries

GNU SASL: GNU Simple Authentication and Security Layer Library.
GnuTLS: GNU Transport Layer Security Library.
GnuTLS-Guile: GNU Transport Layer Security Library. Guile bindings.
Libc: C library.
libidn: Internationalized string processing library.
libidn2: Internationalized domain names (IDNA2008/TR46) processing.
libtasn1: Library for Abstract Syntax Notation One (ASN.1).
mpfr: Multiple Precision Floating-Point Reliable Library.

Sound

SSIP: Speech Synthesis Interface Protocol.
Say for Speech Dispatcher: Say.
Speech Dispatcher: Speech Dispatcher.

System administration

parted: GNU partitioning software

System Administration

certtool: Manipulate certificates and keys.
gnutls-cli-debug: GnuTLS debug client.
gnutls-cli: GnuTLS test client.
gnutls-serv: GnuTLS test server.
psktool: Simple TLS-Pre-Shared-Keys manager.
srptool: Simple SRP password tool.

TeX

DVI-to-PNG: Translating TeX DVI files to Portable Network Graphics (PNG).
DVI-to-Postscript: Translating TeX DVI files to PostScript.
EpsPDF: Portable GUI- and command-line EPS/PS/PDF conversion
Kpathsea: File lookup along search paths.
LaTeX2e: Unofficial LaTeX reference manual.
Naming TeX fonts: Filenames for TeX fonts.
TLbuild: TeX Live configuration and development.
TeX Directories: A directory structure for TeX files.
TeXdraw: A system for producing PostScript drawings from TeX.
TeXdraw: Drawing PostScript diagrams within TeX.
Web2c: TeX, Metafont, and companion programs.
afm2tfm: Making Type 1 fonts available to TeX.
dvipng: A DVI-to-PNG translator.
dvips: DVI-to-PostScript translator.
kpsewhich: TeX file searching.
mf2pt1: PostScript Type 1 fonts from Metafont source.
mktexfmt: Format (fmt/base/mem) generation.
mktexlsr: Update ls-R.
mktexmf: MF source generation.
mktexpk: PK bitmap generation.
mktextex: TeX source generation.
mktextfm: TeX font metric generation.

TeX

TeXdraw: A system for producing PostScript drawings from TeX.
TeXdraw: Drawing PostScript diagrams within TeX.

Texinfo documentation system

info stand-alone: Read Info documents without Emacs.

Text creation and manipulation

Diffutils: Comparing and merging files.
M4: A powerful macro processor.
grep: Print lines that match patterns.
sed: Stream EDitor.

The Algorithmic Language Scheme

Guile Reference: The Guile reference manual.