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How to read passwords in bash scripts in a way like tools which are not showing it on terminal ?

(Changing font to black on black might be tricky by easy to copy&paste - so it's not solution)

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For anyone reading this: do NOT read in passwords with echo on and black-on-black. The password is still transmitted, and if the terminal doesn't know the terminal directives you've used, characters will echo visibly. Turn echo off. Use termios, stty, read -s, anything that does it. –  Alexios Mar 26 '12 at 22:14
    
That's why I've wrote, that it is not a solution ;). –  Grzegorz Wierzowiecki Mar 26 '12 at 22:18
    
Indeed! Sometimes people skim questions and come to misguided conclusions. :) –  Alexios Mar 26 '12 at 22:25
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2 Answers 2

up vote 14 down vote accepted

From help read:

-s        do not echo input coming from a terminal
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Great. It's not written in my man read, I haven't check in help read. Good to know. –  Grzegorz Wierzowiecki Mar 26 '12 at 21:19
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@GrzegorzWierzowiecki: You are viewing the wrong manual. you have to read the manual of bash i.e man bash and there you can find -s option Silent mode. If input is coming from a terminal, characters are not echoed. –  pradeepchhetri Mar 27 '12 at 6:34
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Your question reads kind of different "in a way like tools???" so I don't exactly know if this will work for you:

system1 $ passwd=abc123
system1 $ printf "%s\n" "${passwd//?/*}"
******
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