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I was trying to install postfix on Ubuntu 11.10 for SMTP support... I typed

sudo apt-get install postfix

and then the installation started.

But during installation a configuration screen popped up which requested me to select an option. Now the problem is that there is no link to accept an option in the configuration screen, and as I can't select an option the installation process stalls.

If i exit the terminal and again try to re-install i get a message

could not get lock /var/cache/apt/archives/lock -open(11. resource temporarily    unavailable)

Screenshots of the problem:

enter image description here

enter image description here

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You should be able to hit tab to move to the Ok button in the debconf window. –  David Brigada Dec 13 '11 at 20:50
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This question is more appropriate for serverfault.com –  Beau Grantham Dec 13 '11 at 20:54
    
@david...thanks it worked –  avinash Dec 14 '11 at 7:43
    
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migrated from stackoverflow.com Dec 15 '11 at 0:36

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2 Answers

Try this command in terminal: sudo dpkg-reconfigure postfix

This will bring up the configuration window again [where you left off]. Use the up/down arrow keys on your keyboard to select an option [where more than one option is displayed], and the left/right arrow key to choose [ok] so the next window option follows on etc. till all fields are completed by you

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@iamdom....i did do that but again message appears message '2'(screenshot 2) appears on the screen –  avinash Dec 14 '11 at 7:25
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This is similar to this question for accepting an agreement in a debconf question.

 ⇆ TAB , then return ↵ will let you continue.

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