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+hash_password(1) -- Calculate the hash of a new password, so that passwords can be reset
+========================================================================================
+
+## SYNOPSIS
+
+`hash_password` [`-p`|`--password` [password]] [`-c`|`--config` <file>]
+
+## DESCRIPTION
+
+**hash_password** calculates the hash of a supplied password using bcrypt.
+
+`hash_password` takes a password as an parameter either on the command line
+or the `STDIN` if not supplied.
+
+It accepts an YAML file which can be used to specify parameters like the
+number of rounds for bcrypt and password_config section having the pepper
+value used for the hashing. By default `bcrypt_rounds` is set to **10**.
+
+The hashed password is written on the `STDOUT`.
+
+## FILES
+
+A sample YAML file accepted by `hash_password` is described below:
+
+  bcrypt_rounds: 17
+  password_config:
+    pepper: "random hashing pepper"
+
+## OPTIONS
+
+  * `-p`, `--password`:
+    Read the password form the command line if [password] is supplied.
+    If not, prompt the user and read the password form the `STDIN`.
+    It is not recommended to type the password on the command line
+    directly. Use the STDIN instead.
+
+  * `-c`, `--config`:
+    Read the supplied YAML <file> containing the options `bcrypt_rounds`
+    and the `password_config` section containing the `pepper` value.
+
+## EXAMPLES
+
+Hash from the command line:
+
+    $ hash_password -p "p@ssw0rd"
+    $2b$12$VJNqWQYfsWTEwcELfoSi4Oa8eA17movHqqi8.X8fWFpum7SxZ9MFe
+
+Hash from the STDIN:
+
+    $ hash_password
+    Password:
+    Confirm password:
+    $2b$12$AszlvfmJl2esnyhmn8m/kuR2tdXgROWtWxnX.rcuAbM8ErLoUhybG
+
+Using a config file:
+
+    $ hash_password -c config.yml
+    Password:
+    Confirm password:
+    $2b$12$CwI.wBNr.w3kmiUlV3T5s.GT2wH7uebDCovDrCOh18dFedlANK99O
+
+## COPYRIGHT
+
+This man page was written by Rahul De <<rahulde@swecha.net>>
+for Debian GNU/Linux distribution.
+
+## SEE ALSO
+
+synctl(1), synapse_port_db(1), register_new_matrix_user(1)