(In reply to Vitaly Chikunov from comment #0)
> Удалить из pam prefix=$2y$, перейти на умолчания libxcrypt.

Тогда и count=8 удалить за компанию?

Конечно.

pam-config-1.9.0-alt1 -> sisyphus:

 Sat May 16 2020 Evgeny Sinelnikov <sin@altlinux> 1.9.0-alt1
 - Added configurable substack system-policy.
 - Added filetriggers for system-auth and system-policy methods
   to avoid unknown state during upgrade and uninstall.
 - system-auth-winbind-only: use default ccache.
 - Split system-auth{,-use_first_pass}-{krb5,krb5_ccreds,ldap,winbind} (by ldv@)
   All five methods rewrited using pam_localuser as a chooser:
   if pam_localuser concludes the authenticating user is local, then use local
   method for authentication, otherwise use the corresponding non-local method.
 Wed May 13 2020 Dmitry V. Levin <ldv@altlinux> 1.8.0-alt1
 - Removed prefix=$2y$ count=8 from pam_tcb options (closes: #36279).
 - system-auth-local: split into system-auth-local-only
   and system-auth-common.
 - system-auth-use_first_pass-local: likewise, split into
   system-auth-use_first_pass-local-only and system-auth-common.
 - Merged pam0-config subpackage into pam-config.

Виииииии!

Теперь по умолчанию префикс $y$. Это нормально?

(In reply to Sergey V Turchin from comment #5)
> Теперь по умолчанию префикс $y$. Это нормально?

See crypt(5) manpage.

й(Ответ для Dmitry V. Levin на комментарий #6)
> See crypt(5) manpage.
Да меня и такой ответ уже устраивает, но прочитал. ;-)
Ок, понятно.