Lock User Account

[Trevor]

Write the command that will "fully" lock a user account.  The user
must not must not be able to login to the account by any authentication
means!!!

[Maximus_el]

hi
i new here, i hope me contribution adds value..

usualy,  his password by
# usermod -L usrname

since  "must not be able to login to the account by any authentication
means!!!" then id disable his shell by:
# usermod -s /sbin/nologin username
now not even loging with ssh will work

this is not an answer, this is a try, im still studing RHCSA

waiting for real answers and thank you.

[Chetan_Tiwary_]

Hey @Maximus_el you are doing great!

Here is the method what you suggest :

and here is an alternative :

[Maximus_el]

@Chetan_Tiwary_you are valuable, thank you.

[Trevor]

Maximus, be assured that any contribution you make will add value - whether
your input is correct or incorrect.  And please, don't ever be concerned or 
afraid of being incorrect.  This always affords you, and the rest of the community,
to advance our knowledge - and that's a primary objective for all of us!!!

Thanks for making the effort to answer the question.  The worse thing that's 
going to happen to you being out here is that you're going to learn something - 
what you know, and what you don't know.

Here's some great advice:  Always listen to Chetan_Tiwary!!!!!!!!!!!