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Editorial Team
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Asked: 2026-06-15T18:46:05+00:00

I have a shell script which runs on deployment and I have these lines:

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I have a shell script which runs on deployment and I have these lines:

# Database
createdb $DBNAME
createuser -D -A $DBNAME

However, in my logs I get this error:

  • createdb: could not connect to database postgres: FATAL: Ident
    authentication failed for user “root”
  • createuser: could not connect to database postgres: FATAL: Ident authentication failed for
    user “root”

Would anyone mind telling me what is going wrong here and how I can correct my lines. Surely root should have permission to do this?

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1 Answer

  1. Editorial Team

    the best way to do this, especially if you want your script to be portable, is:

    su --login postgres --command "createdb $DBNAME"

    this should be safer, more secure, and more portable than using -U. i do it this way in all my posgreSQL scripts. you might find it a useful technique. obviously it still needs to be run as a root user (e.g. with sudo).

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