Keyboard shortcuts

Press ← or → to navigate between chapters

Press S or / to search in the book

Press ? to show this help

Press Esc to hide this help

Text Processing

awk / gawk / mawk / nawk

https://www.gnu.org/software/gawk/manual/gawk.html

  • Program validated: system, getline, |, > constructs checked
  • Allowed standalone flags: –characters-as-bytes, –copyright, –gen-pot, –lint, –no-optimize, –optimize, –posix, –re-interval, –sandbox, –traditional, –use-lc-numeric, –version, -C, -N, -O, -P, -S, -V, -b, -c, -g, -r, -s, -t
  • Allowed valued flags: –assign, –field-separator, -F, -v

cat

https://www.gnu.org/software/coreutils/manual/coreutils.html#cat-invocation

  • Allowed standalone flags: -A, -E, -T, -V, -b, -e, -h, -l, -n, -s, -t, -u, -v, –help, –number, –number-nonblank, –show-all, –show-ends, –show-nonprinting, –show-tabs, –squeeze-blank, –version
  • Bare invocation allowed

col

https://man7.org/linux/man-pages/man1/col.1.html

  • Allowed standalone flags: -V, -b, -f, -h, -p, -x, –help, –version
  • Allowed valued flags: -l
  • Bare invocation allowed

column

https://man7.org/linux/man-pages/man1/column.1.html

  • Allowed standalone flags: -J, -L, -R, -V, -e, -h, -n, -t, -x, –fillrows, –help, –json, –keep-empty-lines, –table, –table-noextreme, –table-noheadings, –table-right-all, –version
  • Allowed valued flags: -E, -H, -O, -W, -c, -d, -o, -r, -s, –output-separator, –separator, –table-columns, –table-empty-lines, –table-hide, –table-name, –table-order, –table-right, –table-truncate, –table-wrap
  • Bare invocation allowed

comm

https://www.gnu.org/software/coreutils/manual/coreutils.html#comm-invocation

  • Allowed standalone flags: -1, -2, -3, -V, -h, -i, -z, –check-order, –help, –nocheck-order, –total, –version, –zero-terminated
  • Allowed valued flags: –output-delimiter

cut

https://www.gnu.org/software/coreutils/manual/coreutils.html#cut-invocation

  • Allowed standalone flags: -V, -h, -n, -s, -w, -z, –complement, –help, –only-delimited, –version, –zero-terminated
  • Allowed valued flags: -b, -c, -d, -f, –bytes, –characters, –delimiter, –fields, –output-delimiter

expand

https://www.gnu.org/software/coreutils/manual/coreutils.html#expand-invocation

  • Allowed standalone flags: -V, -h, -i, –help, –initial, –version
  • Allowed valued flags: -t, –tabs
  • Bare invocation allowed

fmt

https://www.gnu.org/software/coreutils/manual/coreutils.html#fmt-invocation

  • Allowed standalone flags: -V, -c, -h, -m, -n, -s, -u, –crown-margin, –help, –split-only, –tagged-paragraph, –uniform-spacing, –version
  • Allowed valued flags: -d, -g, -l, -p, -t, -w, –goal, –prefix, –width
  • Bare invocation allowed

fold

https://www.gnu.org/software/coreutils/manual/coreutils.html#fold-invocation

  • Allowed standalone flags: -V, -b, -h, -s, –bytes, –help, –spaces, –version
  • Allowed valued flags: -w, –width
  • Bare invocation allowed

glow

https://github.com/charmbracelet/glow

  • Allowed standalone flags: –help, –version, -h, -v, –all, -a, –local, -l, –pager, -p
  • Allowed valued flags: –style, -s, –width, -w, –config
  • Bare invocation allowed
  • Hyphen-prefixed positional arguments accepted

https://www.gnu.org/software/coreutils/manual/coreutils.html#head-invocation

  • Allowed standalone flags: -V, -h, -q, -v, -z, –help, –quiet, –silent, –verbose, –version, –zero-terminated
  • Allowed valued flags: -c, -n, –bytes, –lines
  • Bare invocation allowed
  • Numeric shorthand accepted (e.g. -20 for -n 20)

iconv

https://man7.org/linux/man-pages/man1/iconv.1.html

  • Allowed standalone flags: -V, -c, -h, -l, -s, –help, –list, –silent, –version
  • Allowed valued flags: -f, -t, –from-code, –to-code

less

https://man7.org/linux/man-pages/man1/less.1.html

  • Allowed standalone flags: -E, -F, -G, -I, -J, -K, -L, -M, -N, -Q, -R, -S, -V, -W, -X, -a, -c, -e, -f, -g, -i, -m, -n, -q, -r, -s, -w, –QUIT-AT-EOF, –RAW-CONTROL-CHARS, –chop-long-lines, –help, –ignore-case, –no-init, –quiet, –quit-at-eof, –quit-if-one-screen, –raw-control-chars, –silent, –squeeze-blank-lines, –version
  • Allowed valued flags: -P, -b, -h, -j, -p, -t, -x, -y, -z, –LINE-NUMBERS, –LONG-PROMPT, –pattern, –prompt, –shift, –tabs, –tag, –window
  • Bare invocation allowed

more

https://man7.org/linux/man-pages/man1/more.1.html

  • Allowed standalone flags: -V, -c, -d, -f, -h, -l, -p, -s, -u, –help, –version
  • Allowed valued flags: -n, –lines
  • Bare invocation allowed

nl

https://www.gnu.org/software/coreutils/manual/coreutils.html#nl-invocation

  • Allowed standalone flags: -V, -p, –help, –no-renumber, –version
  • Allowed valued flags: -b, -d, -f, -h, -i, -l, -n, -s, -v, -w, –body-numbering, –footer-numbering, –header-numbering, –join-blank-lines, –line-increment, –number-format, –number-separator, –number-width, –section-delimiter, –starting-line-number
  • Bare invocation allowed

nroff

https://man7.org/linux/man-pages/man1/nroff.1.html

  • Allowed standalone flags: -S, -V, -c, -h, -i, -k, -p, -q, -t, –help, –version
  • Allowed valued flags: -M, -P, -T, -d, -m, -n, -o, -r, -w

paste

https://www.gnu.org/software/coreutils/manual/coreutils.html#paste-invocation

  • Allowed standalone flags: -V, -h, -s, -z, –help, –serial, –version, –zero-terminated
  • Allowed valued flags: -d, –delimiters
  • Bare invocation allowed

perl

https://perldoc.perl.org/perl

  • Allowed: -e/-E inline one-liners with safe built-in functions, –version, –help, -v, -V. Requires -e/-E flag. Code is validated against a safe identifier allowlist.

rev

https://man7.org/linux/man-pages/man1/rev.1.html

  • Allowed standalone flags: -V, -h, –help, –version
  • Bare invocation allowed

sed

https://www.gnu.org/software/sed/manual/sed.html

  • Allowed standalone flags: –debug, –help, –posix, –quiet, –sandbox, –silent, –unbuffered, –version, -E, -V, -h, -n, -r, -u, -z
  • Allowed valued flags: –expression, –file, –line-length, -e, -f, -l
  • Inline expressions validated for safety

tac

https://www.gnu.org/software/coreutils/manual/coreutils.html#tac-invocation

  • Allowed standalone flags: -V, -b, -h, -r, –before, –help, –regex, –version
  • Allowed valued flags: -s, –separator
  • Bare invocation allowed

tail

https://www.gnu.org/software/coreutils/manual/coreutils.html#tail-invocation

  • Allowed standalone flags: -F, -V, -f, -h, -q, -r, -v, -z, –follow, –help, –quiet, –retry, –silent, –verbose, –version, –zero-terminated
  • Allowed valued flags: -b, -c, -n, –bytes, –lines, –max-unchanged-stats, –pid, –sleep-interval
  • Bare invocation allowed
  • Numeric shorthand accepted (e.g. -20 for -n 20)

tr

https://www.gnu.org/software/coreutils/manual/coreutils.html#tr-invocation

  • Allowed standalone flags: -C, -V, -c, -d, -h, -s, –complement, –delete, –help, –squeeze-repeats, –truncate-set1, –version

unexpand

https://www.gnu.org/software/coreutils/manual/coreutils.html#unexpand-invocation

  • Allowed standalone flags: -V, -a, -h, –all, –first-only, –help, –version
  • Allowed valued flags: -t, –tabs
  • Bare invocation allowed

uniq

https://www.gnu.org/software/coreutils/manual/coreutils.html#uniq-invocation

  • Allowed standalone flags: -D, -V, -c, -d, -h, -i, -u, -z, –count, –help, –ignore-case, –repeated, –unique, –version, –zero-terminated
  • Allowed valued flags: -f, -s, -w, –all-repeated, –check-chars, –group, –skip-chars, –skip-fields
  • Bare invocation allowed

wc

https://www.gnu.org/software/coreutils/manual/coreutils.html#wc-invocation

  • Allowed standalone flags: -L, -V, -c, -h, -l, -m, -w, –bytes, –chars, –help, –lines, –max-line-length, –version, –words, –zero-terminated
  • Allowed valued flags: –files0-from
  • Bare invocation allowed

zcat

https://man7.org/linux/man-pages/man1/zcat.1.html

Aliases: gzcat

  • Allowed standalone flags: -V, -f, -h, -q, -v, –force, –help, –quiet, –verbose, –version
  • Bare invocation allowed