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Archiving
Tar
Making tape (or disk) archives.
Basics
Common options
Coreutils
Core GNU (file, text, shell) utilities.
Date input formats
File permissions
Access modes.
Finding files
Operating on files matching certain criteria.
Compression
Gzip
General (de)compression of files (lzw).
Editors
nano
Small and friendly text editor.
General Commands
Screen
Full-screen window manager.
GNU organization
Maintaining
Maintaining GNU software.
Maintaining Findutils
Maintaining GNU findutils
Standards
GNU coding standards.
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
arch
Print machine hardware name.
autoconf-invocation
How to create configuration scripts
autoheader
How to create configuration templates
autom4te
The Autoconf executables backbone
autoreconf
Remaking multiple 'configure' scripts
autoscan
Semi-automatic 'configure.ac' writing
autoupdate
Automatic update of 'configure.ac'
awk
Text scanning and processing.
b2sum
Print or check BLAKE2 digests.
base32
Base32 encode/decode data.
base64
Base64 encode/decode data.
basename
Strip directory and suffix.
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.
config.status
status Invocation. Recreating configurations.
configure
Configuring a package.
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 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.
du
Report on disk usage.
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.
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.
ifnames
Listing conditionals in source.
install
Copy files and set attributes.
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.
mkdir
Create directories.
mkfifo
Create FIFOs (named pipes).
mknod
Create special files.
mktemp
Create temporary files.
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.
pathchk
Check file name portability.
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
Synchronize memory to disk.
tac
Reverse files.
tail
Output the last part of files.
tar
Invoking GNU 'tar'.
tee
Redirect to multiple files.
test
File/string tests.
testsuite
Running an Autotest test suite.
timeout
Run with time limit.
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.
wc
Line, word, and byte counts.
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
The GRand Unified Bootloader
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
Libraries
RLuserman
The GNU readline library User's Manual.
Network applications
Gawkinet
TCP/IP Internetworking With 'gawk'.
Wget
Non-interactive network downloader.
Software development
Autoconf
Create source code configuration scripts.
Make
Remake files automatically.
Software libraries
Libc
C library.
Text creation and manipulation
Diffutils
Comparing and merging files.
Gawk
A text scanning and processing language.
grep
Print lines matching a pattern.
sed
Stream EDitor.

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