postalias: fatal: open /etc/postfix/aliases.db: Permission denied

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http://unix.stackexchange.com – I ran this as root, so I'm not sure why there was a permission denied error. What do I need to do to resolve the postfix error mentioned below? (And any idea what caused this?) BTW, postfix is still working fine (emails get delivered) and I have not rebooted the server yet. This is Ubuntu 10.04 on Linode. sudo apt-get install curl Reading package lists... Done Building dependency tree Reading state information... Done The following extra packages will be installed: libcurl3 The following NEW packages will be installed: curl libcurl3 0 upgraded, 2 newly installed, 0 to remove and 7 (HowTos)