In article <[🔎] 19990908021859.A7698@willamette.edu> you write: >A conflict in the debian sense, or a conflict in the "one is allowed but a A conflict in the debian sense - ie dpkg produces a conflict error message. Just in case enyone is confused (I don't understand why everyone seems to be quoting my old case), I will requote the error message: snoopy# dpkg --no-act -i postfix_0.0.19990601-3_i386.deb Selecting previously deselected package postfix. dpkg: regarding postfix_0.0.19990601-3_i386.deb containing postfix: postfix conflicts with mail-transport-agent qmail provides mail-transport-agent and is installed. dpkg: error processing postfix_0.0.19990601-3_i386.deb (--install): conflicting packages - not installing postfix Errors were encountered while processing: postfix_0.0.19990601-3_i386.deb >single smtp server running at a time" conflict? I do wonder why I would suspect that this could be a problem, but not for long. (however, if I could install both qmail and postfix, it would enable me to transfer one stage at a time, instead of everything at once. I have a few non-standard things in my setup (eg fidonet), that I am not 100% sure of under postfix). >sendmail-purge qmail-install did not work for Brian, but to have both qmail >and sendmail on the same computer seems a little dangerous. :) This was sometime ago (perhaps the first Debian version), so it might be different now. I hope nobody was confused when reading my original message, I previously upgraded sendmail to qmail, but that is now history. I now want to upgrade **qmail** to **postfix**. I repeat. I now want to upgrade qmail -------------> postfix Anyway, the point is that I do encounter the problems when trying to upgrade qmail --> postfix. I quoted the dpkg error message, above, and in my previous message. I am not sure what you mean, sendmail-purge, qmail-install. I will translate that to qmail-purge postfix-install. Perhaps, I should create my own apt-source directory with the slink package for postfix, and use apt instead of dpkg? However, that seems excessive. snoopy# dpkg --no-act --purge qmail dpkg: dependency problems prevent removal of qmail: ezmlm-idx depends on qmail. ifmail depends on mail-transport-agent; however: Package mail-transport-agent is not installed. Package qmail which provides mail-transport-agent is to be removed. mutt depends on mail-transport-agent; however: Package mail-transport-agent is not installed. Package qmail which provides mail-transport-agent is to be removed. inn depends on mail-transport-agent; however: Package mail-transport-agent is not installed. Package qmail which provides mail-transport-agent is to be removed. mailx depends on smail | mail-transport-agent; however: Package smail is not installed. Package mail-transport-agent is not installed. Package qmail which provides mail-transport-agent is to be removed. elm-me+ depends on mail-transport-agent; however: Package mail-transport-agent is not installed. Package qmail which provides mail-transport-agent is to be removed. newsgate depends on mail-transport-agent; however: Package mail-transport-agent is not installed. Package qmail which provides mail-transport-agent is to be removed. ifgate depends on mail-transport-agent; however: Package mail-transport-agent is not installed. Package qmail which provides mail-transport-agent is to be removed. anacron depends on smail | sendmail | mail-transport-agent; however: Package smail is not installed. Package sendmail is not installed. Package mail-transport-agent is not installed. Package qmail which provides mail-transport-agent is to be removed. dpkg: error processing qmail (--purge): dependency problems - not removing Errors were encountered while processing: qmail I don't want to have to uninstall all of these packages (except perhaps ezmlm-idx which might not work with postfix). snoopy# dpkg --no-act --purge qmail -i postfix_0.0.19990601-3_i386.deb dpkg: you must specify packages by their own names, not by quoting the names of the files they come in (obviously dpkg is trying to purge packages named "qmail", "-i", and "postfix_0.0.19990601-3_i386.deb", hence I conclude that I cannot remove one package and install another in an "atomic" operation using dpkg) I could run dpkg with --force-conflicts, despite the claim: WARNING - use of options marked [!] can seriously damage your installation. I don't think replacing qmail with postfix will break anything, unless I somehow break my mail configuration. -- Brian May <bam@snoopy.apana.org.au>
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