Re: userid change to upper case

From: Bill Marcum (bmarcum_at_iglou.com.urgent)
Date: 06/17/05

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    Date: Thu, 16 Jun 2005 18:07:02 -0400

    On 16 Jun 2005 13:56:46 -0700, nasir
      <nasir.kamal@gmail.com> wrote:
    > how can I change the userid of a user in /etc/passwd file matching a
    > specific pattern to upper case? The pattern to be looked for is e.g.
    > "uy???abc"
    >
    > I would prefer sed.
    >
    But awk would be easier:
    awk -F: -v OFS=: '$1~/uy...abc/{$1=toupper($1)}{print}' /etc/passwd \
    >passwd.tmp
    mv passwd.tmp /etc/passwd

    sed has the 'y/abcdef/ABCDEF/' command which can convert lower to upper
    case and vice versa, but it works on a whole line at a time.

    You may also need to change the usernames in /etc/shadow, and in some
    versions of *ix the login program will not accept an uppercase username.
    In fact, I'm not sure if any do allow it. 

    -- 
I cannot believe that God plays dice with the cosmos.
		-- Albert Einstein, on the randomness of quantum mechanics
  • Next message: Bill Marcum: "Re: Replace several lines by a line"

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