I agree with Bruce. Whether the OP's problem can be corrected by individually changing ownership really depends on the case. If there're only a few apps installed, e.g., only Apache, PHP, and Oracle (which may be typical), changing ownership back is not a big deal.
Everybody makes mistakes. I remember when I was a DBA at a small company in 1999, I accidentally updated all customers' email addresses to the same one, because I forgot the where clause in the SQL! Fortunately, I backed up the table right before the update, as my personal habit. The problem lasted for about 1 minute and was corrected. Since then, when I chat with coworkers about what's the biggest mistake you've ever had, I tell them this story.
Yong Huang
> Bruce,
>
> At my University, a person who was getting to know Linux did this
> accidentally. In trying to rectify the situation, he was still having
> issues accessing certain devices. Unless you have done some script that
> parsed your permissions on a fresh install and subsequent updates or you
> run a corporate *nix (Apple), you are going to have some strange issues
> for quite awhile. Production machines should not have to be in that
> situation, so re-installation is the best solution...nuking from orbit
> is the only way to be sure!
>
> Good luck!
>
> Robert
>
> bruce wrote:
> > david...
> >
> > why did he need to reinstall the entire system again?????
> >
> > he changed the owner of everything to some "user". yep, this will be an
> > issue to some/alot of things... but depending on the circumstances, he could
> > over time figure out which apps/files should be "root" and then figure out
> > the rest later on!!
> >
> > on the other hand, reinstalling might be easier, if he left the
> > drive/format/partitions the same.. but it still wouldn't do anything for his
> > own apps/files that aren't system provided.. this definitely points to a
> > good backup/restore process though...
> >
> > god knows i walkt the tightrope line enough, with no backup/restore!!
> >
> > peace
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