The same behavior can be seen in Ubuntu 23.04. The look command requires a sorted file. If no argument is given /usr/share/dict/words is used as default file and the f flag is set. /usr/share/dict/words is sorted with upper case preceding lower case. But when the f flag is set a sort ignoring case is assumed.
So the command look works as documented. It is simply that the sort sequence of /usr/share/dict/words does not match what look needs. You can create your own wordlist, sort it to your needs, and point environment variable WORDLIST to it. $ cat /usr/share/dict/american-english | sort > foo $ WORDLIST=foo look accicent accident accidental accidentally accidental's accidentals accident's accidents I would suggest not to change anything in util-linux. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to util-linux in Ubuntu. https://bugs.launchpad.net/bugs/1971425 Title: The "look" cli dictionary only sees capitalized words Status in util-linux package in Ubuntu: Confirmed Bug description: In Ubuntu 20.04; ~ > look accident accident accident's accidental accidental's accidentally accidentals accidents In Ubuntu 22.04; ~ > look accident (nothing) ~ > look acc Accenture Accenture's Accra Accra's Digging deeper; the dictionary at /usr/share/dict/words seems OK. If I copy the "look" binary from Ubuntu 20.04 and use it on Ubuntu 22.04 it works; ~ > ./look accident accident accidental accidentally accidental's accidentals accident's accidents ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: bsdextrautils 2.37.2-4ubuntu3 ProcVersionSignature: Ubuntu 5.15.0-27.28-generic 5.15.30 Uname: Linux 5.15.0-27-generic x86_64 ApportVersion: 2.20.11-0ubuntu82 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: XFCE Date: Tue May 3 14:19:57 2022 InstallationDate: Installed on 2018-09-07 (1334 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) SourcePackage: util-linux UpgradeStatus: Upgraded to jammy on 2022-05-01 (2 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1971425/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : email@example.com Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp