Provided by: proftpd-core_1.3.7c+dfsg-1build1_amd64 
NAME
ftpasswd - manipulates ProFTPD authentication files
SYNOPSIS
ftpasswd --help|-h|--version
ftpasswd --hash [ --des|--md5|--sha256|--sha512 ] [ --stdin ]
[ --use-cracklib[=path] ]
ftpasswd --passwd [ -F|--force ] [ --file=filename ] [--gecos=string ]
[ --gid=gid ] [ --des|--md5|--sha256|--sha512 ] [ --not-system-password ]
[ --not-previous-password ] [ --delete-user [ --stdin ]
[ --use-cracklib[=path] ] --home=path --name=username
--shell=shellpath --uid=uid
ftpasswd --group [ -F|--force ] [ --enable-group-passwd ] [ --delete-group ]
[ --file=filename ] [ -m|--member ] [ --des|--md5|--sha256|--sha512 ]
[ --stdin ] [ --use-cracklib[=path] ] --gid=gid --name=groupname
ftpasswd --passwd --change-password --name=username
ftpasswd --passwd -l|--lock --name=username
ftpasswd --passwd -u|--unlock --name=username
DESCRIPTION
ftpasswd is a Perl script which can be used to manipulate the password and group files
suitable for use with ProFTPD AuthUserFile and AuthGroupFile configuration directives.
The idea is somewhat similar to Apache's htpasswd program.
Required options are --passwd, --group, or --hash. These specify whether ftpasswd is to
operate on a passwd(5) format file, on a group(5) format file, or simply to generate a
password hash, respectively.
If used with --passwd, ftpasswd creates a file in the passwd(5) format, suitable for use
with proftpd's AuthUserFile configuration directive. You will be prompted for the
password to use of the user, which will be encrypted, and written out as the encrypted
string. By default, using --passwd will write output to "./ftpd.passwd",
If used with --hash, ftpasswd generates a hash of a password, as would appear in an
AuthUserFile. The hash is written to standard out. This hash is suitable for use with
proftpd's UserPassword directive.
If used with --group, ftpasswd creates a file in the group(5) format, suitable for use
with proftpd's AuthGroupFile configuration directive. By default, using --group will
write output to "./ftpd.group".
OPTIONS
-F, --force
If the password or group file be used already exists, delete it and write a new
one. By default, new entries will be appended to the file.
--file=filename
Write output to specified file (password or group files), rather than default one.
--gecos=string
Descriptive string for the given user (usually the user's full name).
--gid=gid
Set primary group ID for this user (optional, will default to given --uid value if
absent) when --passwd is specified.
--uid=uid
numerical user ID.
-h, --help, --version
Show usage and version of the program.
--home=path
Set the home directory for the user (required).
--des, --md5, --sha256, --sha512
Use the DES, MD5, SHA-256 or SHA-512 algorithm for encrypting passwords. The
default is the MD5 algorithm.
--name=username, --name=groupname
Name of the user account or group (required). If the name does not exist in the
specified output-file, an entry will be created for it. Otherwise, the given fields
will be updated.
--shell=path
Shell for the user (required). Recommended: /bin/false
--change-password
Update only the password field for a user. This option requires that the --name
and --passwd options be used, but no others. This also double-checks the given
password against the user's current password in the existing passwd file, and
requests that a new password be given if the entered password is the same as the
current password.
--not-previous-password
Double-checks the given password against the previous password for the user, and
requests that a new password be given if the entered password is the same as the
previous password.
--not-system-password
Double-checks the given password against the system password for the user, and
requests that a new password be given if the entered password is the same as the
system password. This helps to enforce different passwords for different types of
access.
--stdin
Read the password directly from standard in rather than prompting for it. This is
useful for writing scripts that automate use of ftpasswd.
-l, --lock
Lock the password of the named account. This option disables a password by changing
it to a value which matches no possible encrypted value (it adds a '!' at the
beginning of the password).
-u, --unlock
Unlock the password of the named account. This option re-enables a password by
changing the password back to its previous value (to the value before using the -l
option).
--use-cracklib[=path]
Causes ftpasswd to use Alec Muffet's cracklib routines in order to determine and
prevent the use of bad or weak passwords. The optional path to this option
specifies the path to the dictionary files to use -- default path is
/usr/lib/cracklib_dict. This requires the Perl Crypt::Cracklib module to be
installed on your system.
--delete-user
Remove the entry for the given user name from the file.
--delete-group
Remove the entry for the given group name from the file.
--enable-group-passwd
Prompt for a group password. This is disabled by default, as group passwords are
not usually a good idea at all.
-m username, --member=username
user to be a member of the group. This argument may be used This argument may be
used multiple times to specify the full list of users to be members of this group.
BUGS
No known bugs at this time. If you discover any bugs, please contact the author.
AUTHOR
This program has been written by TJ Saunders <tj@castaglia.org> as a contributed software
for ProFTPD.
SEE ALSO
proftpd(8), passwd(5), group(5), ftpusers(8), ftpstats(8), proftpd.conf(5)
CREDITS
This manual page was written by Francesco Paolo Lovergine <frankie@debian.org>. Last
update Thu Mar 10 16:45:27 UTC 2011 by Mahyuddin Susanto <udienz@ubuntu.com> for the
Debian GNU/Linux system (but may be used by others).