useradd
can also add users and does not appear to have any form of prompting built in.
useradd -m -p <encryptedPassword> -s /bin/bash <user>
-m
, --create-home
: Create user home directory
-p
, --password
: Specify user password; skip to have it disabled
-s
, --shell
: Default shell for logon user
Blank will use default login shell specified by the SHELL
variable in /etc/default/useradd
- Substitute
<user>
with the login name
- Substitute
<encryptedPassword>
with the encrypted password
Generating a hashed password:
There are a lot of crypt3 implementations that can generate a hashed password. The whole thing is your hashed password.
Sha-512 Based
The resulting output format: the hash mechanism ($6
for sha-512), the random salt (the eight bytes after the second dollar sign $ASDF1234
), remainder is the payload.
DES based:
The resulting output format: first 2 bytes is your salt, remainder is the payload. The whole thing is your hashed password.
- mkpasswd:
mkpasswd
(provided by whois
package)
- openssl:
openssl passwd -crypt
- perl:
perl -e "print crypt('password');"
- python:
python3 -c 'import crypt; print(crypt.crypt("password"))'