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  This (the Directory node) gives a menu of major topics.
  Typing "q" exits, "H" lists all Info commands, "d" returns here,
  "h" gives a primer for first-timers,
  "mEmacs<Return>" visits the Emacs manual, etc.

  In Emacs, you can click mouse button 2 on a menu item or cross reference
  to select it.

Basics

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.

C++ libraries

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

Compression

Gzip: General (de)compression of files (lzw).

Development

libffi: Portable foreign function interface library.

Emacs

Emacs FAQ: Frequently Asked Questions about Emacs.

Emacs misc features

Transient: Transient Commands.

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 organization

Maintaining Findutils: Maintaining GNU findutils

GNU Utilities

dirmngr-client: X.509 CRL and OCSP client.
dirmngr: X.509 CRL and OCSP server.
gpg-agent: The secret key daemon.
gpg2: OpenPGP encryption and signing tool.
gpgsm: S/MIME encryption and signing tool.

Individual utilities

aclocal-invocation: Generating aclocal.m4.
arch: Print machine hardware name.
automake-invocation: Generating Makefile.in.
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.
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.
cp: Copy files.
csplit: Split by context.
cut: Print selected parts of lines.
date: Print/set system date and time.
dd: Copy and convert a file.
df: Report file system 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.
du: Report file usage.
dvicopy: Virtual font expansion
dvitomp: DVI to MPX (MetaPost pictures).
dvitype: DVI to human-readable text.
echo: Print a line of text.
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.
gftodvi: Generic font proofsheets.
gftopk: Generic to packed fonts.
gftype: GF to human-readable text.
groups: Print group names a user is in.
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.
install: Copy files and set attributes.
install-tl: Installing TeX Live.
join: Join lines on a common field.
kill: Send a signal to processes.
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.
md5sum: Print or check MD5 digests.
mf: Creating typeface families.
mft: Prettyprinting Metafont source.
mkdir: Create directories.
mkfifo: Create FIFOs (named pipes).
mknod: Create special files.
mktemp: Create temporary files.
mltex: Multi-lingual TeX.
mpost: Generating PostScript.
mv: Rename files.
nice: Modify niceness.
nl: Number lines and write files.
nohup: Immunize to hangups.
nproc: Print the number of processors.
numfmt: Reformat numbers.
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.
pr: Paginate or columnate files.
printenv: Print environment variables.
printf: Format and print data.
ptx: Produce permuted indexes.
pwd: Print working directory.
readlink: Print referent of a symlink.
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.
shred: Remove files more securely.
shuf: Shuffling text files.
sleep: Delay for a specified time.
sort: Sort text files.
split: Split into pieces.
stat: Report file(system) status.
stdbuf: Modify stdio buffering.
stty: Print/change terminal settings.
sum: Print traditional checksum.
sync: Sync files to stable storage.
tac: Reverse files.
tail: Output the last part of files.
tangle: WEB to Pascal.
tee: Redirect to multiple files.
test: File/string tests.
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).
updatedb: Building the locate database.
uptime: Print uptime and load.
users: Print current user names.
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.
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

RLuserman: The GNU readline library User's Manual.

Man-pages

Latex2man: Its Man-Page

Network applications

Wget: Non-interactive network downloader.

Security Tools

Integrit: Integrit File Verification System.

Software development

Automake: Making GNU standards-compliant Makefiles.
Automake-history: History of Automake development.

TeX

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.
Naming TeX fonts: Filenames for TeX fonts.
TLbuild: TeX Live configuration and development.
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.
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

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.
Naming TeX fonts: Filenames for TeX fonts.
TLbuild: TeX Live configuration and development.
TeXdraw: A system for producing PostScript drawings from TeX.
TeXdraw: Drawing PostScript diagrams within TeX.
afm2tfm: Making Type 1 fonts available to TeX.
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.

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.

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