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MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
/usr/bin/passwd offers a "safe way" for root to edit /etc/passwd (or shadow). If setuid it allows regular users to change passwd without asking root to do changes for them.
(note: does have learning curve on args to choose)
gnupasswd - gnu change user password
gnugpasswd - gnu change group password
gnupasswd(1) has a goal to work with older login.c/linux and some newer too, also "getpwent" (any glibc). or help convert.
gnupassd does pass only: leaves all else alone (compat). ...
pam_mobtok is a PAM module together with a J2ME midlet to realize authentification. A password is entered into the J2ME capable mobile device which then generates a token that is valid for a short time.
CAILogin (Counter AI Login) is an image-based user verification program for web-page logins. It's written in plain C with no special dependencies, and hence it's very suitable for embedded systems which lack "big" interpreted languages, such as PHP.
A configurable system for synchronising multiple passwords of different types. Password quality can be imposed by using histories, cracklib based tests, and forcing certain passwords to be distinct. CGI and PAM modules exist for tight integration.
BRUTALIS - BRUTeforce ALternative Is Stupid. Brutalis generate brute force passwords. It can be integrated in any command line for an attack and support resume, character panel, minimum and maximum length, special separating characters and more.
This module is aimed at environments with SMB (Samba or Windows NT)
or NCP (Netware or Mars-NWE) servers that Unix users wish to access
transparently. The module also supports mounting home directories using
loopback encrypted filesystems.