Roberto, do anything like CVS tags exist for Debian's dpkg/apt-get
system?
I we were to run a Debian unstable desktop, immediately after each
"apt-get upgrade" I would want to tag all current packages so that if
anything later broke I would have some automatic record of what
package versions I was running when, to help me figure out what went
wrong. Is there some easy way to do that?
You can probably do this with dselect, the older interface to the Debian package system. I don't remember the switches offhand, but you can get dselect to output a list of all installed packages and their version numbers. You could run this before and after an 'apt-get upgrade' and use 'diff' to compare the two.