How does one specify a particular version of a software package to yum to install? Is this even possible? What happens to superceded pacjkages in repos? Are they simple removed/discarded?
yum install package-X.Y.Z-A.el5 ???
The reason I ask is if a yum update goes awry for some reason then how does one revert to the previous (working) version? I seem to recall that up2date had a feature whereby one could locally archive superseded packages and rollback to a previous version was required.
James B. Byrne wrote:
How does one specify a particular version of a software package to yum to install? Is this even possible? What happens to superceded pacjkages in repos? Are they simple removed/discarded?
yum install package-X.Y.Z-A.el5 ???
The yum version in 5.2 will have a --allow-downgrade option.
Cheers,
Ralph
James B. Byrne wrote:
How does one specify a particular version of a software package to yum to install? Is this even possible? What happens to superceded pacjkages in repos? Are they simple removed/discarded?
yum install package-X.Y.Z-A.el5 ???
The reason I ask is if a yum update goes awry for some reason then how does one revert to the previous (working) version? I seem to recall that up2date had a feature whereby one could locally archive superseded packages and rollback to a previous version was required.
I've spent some time struggling with this issue too. The current version of yum will let you specify an older version (as detailed in the man page) and install it - but you then have to be very careful with your `yum update`s to avoid accidentally upgrading it. Once you have a later version installed you cannot, currently, downgrade it - the only way to install an older version "over" an existing version is to remove the package and then explicitly install the older version, and this can result in some nasty dependency issues.
As has already been pointed out, this looks to be about to change in the next version(s) of yum in CentOS.
Regards -Laurence
On Thu, Jun 19, 2008 at 2:25 AM, Laurence Alexander Hurst L.A.Hurst@lboro.ac.uk wrote:
I've spent some time struggling with this issue too. The current version of yum will let you specify an older version (as detailed in the man page) and install it - but you then have to be very careful with your `yum update`s to avoid accidentally upgrading it. Once you have a later version installed you cannot, currently, downgrade it - the only way to install an older version "over" an existing version is to remove the package and then explicitly install the older version, and this can result in some nasty dependency issues.
Avoiding accidental updates is as easy as putting exclusion rules in your yum repo files. I do this routinely to prevent my OOo 2.4.1 from getting overwritten by (and me getting notices for) "newer" revisions of older base versions. (Exclusion rules don't care which way the update would go, up or down.)
mhr
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James B. Byrne -
Laurence Alexander Hurst -
MHR -
Ralph Angenendt