/etc/shadow encrypted password

UNIX for Advanced & Expert Users
1

Hi

I wonder whether is possible to generate enrypted passwd for some user and paste it into /etc/shadow file ?

What kind of encryption is used in /etc/shadow file ?

ths for help.

2

for redhat default is md5 hashing

 
# grep "ENCRYPT_METHOD" /etc/login.defs
MD5

take the password

 
# read -sre password

after create md5 hashed password

 
# openssl passwd -1 -salt 9Qj/F.Xw $password
$1$9Qj/F.Xw$TigyWrjyikSFKTX6Zye0t/

-1 for MD5-based password algorithm
-salt for add salt key

for example

 
# useradd -p `openssl passwd -1 -salt 9Qj/F.Xw $password` mynewuser

 
# cat /etc/shadow | grep mynewuser
mynewuser:$1$9Qj/F.Xw$TigyWrjyikSFKTX6Zye0t/:14756:0:99999:7:::

Regards
ygemici