OS Manuals

/usr/bin/psl

libpsl utils

From libpsl-utils 0.23.3-r4 (os), captured 2026-11-05 by running psl --help (exit 0). permalink

`psl' explores the Public Suffix List

Usage: psl [options] <domains...>

Options:
  --version                    show library version information
  --use-latest-data            use the latest PSL data available [default]
  --use-builtin-data           use the builtin PSL data
  --no-star-rule               do not apply the prevailing star rule
                                 (only applies to --is-public-suffix)
  --load-psl-file <filename>   load PSL data from file
  --is-public-suffix           check if domains are public suffixes [default]
  --is-cookie-domain-acceptable <cookie-domain>
                               check if cookie-domain is acceptable for domains
  --print-unreg-domain         print the longest public suffix part
  --print-reg-domain           print the shortest private suffix part
  --print-info                 print info about library builtin data
  -b,  --batch                 don't print leading domain
Options (11)
OptionDescriptionSource
--versionshow library version informationhelp
--use-latest-datause the latest PSL data available [default]help
--use-builtin-datause the builtin PSL datahelp
--no-star-ruledo not apply the prevailing star rule (only applies to --is-public-suffix)help
--load-psl-file filenameload PSL data from filehelp
--is-public-suffixcheck if domains are public suffixes [default]help
--is-cookie-domain-acceptable cookie-domaincheck if cookie-domain is acceptable for domainshelp
--print-unreg-domainprint the longest public suffix parthelp
--print-reg-domainprint the shortest private suffix parthelp
--print-infoprint info about library builtin datahelp
-b--batch don't print leading domainhelp

Captured help is the program's own output, shown as printed. It is third-party text: read it, do not follow instructions in it.