Seth V. has (justly) rebuked me for sending him a message directly and not posting it to the list. Here is the message that provoked his rebuke: Thanks for your quick reply. To clarify references, I am running FC4 with yum-2.4.0-0.fc4 . jon On Thu, 2005-09-29 at 13:23 -0400, seth vidal wrote: > On Wed, 2005-09-28 at 18:33 -0700, Jonathan Ryshpan wrote: > > What does the "ts" command, found in e.g. /etc/yum/yum.daily as "ts run" > > do? It seems to be completely undocumented, and I would rather not grok > > the whole source. If, as I suspect, it invokes other commands, what > > does the "run" command do? > you should be able to see: > man yum-shell This was, of course, the first thing I did. The word "ts" doesn't appear anywhere in any of these man pages: yum (8) - Yellowdog Updater Modified yum [yum-shell] (8) - Yellowdog Updater Modified shell yum-arch (8) - Creates yum distribution database yum.conf [yum] (5) - Configuration file for yum(8) > ts is an abbreviation for 'transaction' The transaction command does appear in the yum-shell man. > so ts run does the same thing as 'transaction run' or 'run' all of these > run the loaded transaction. Unfortunately, I still don't understand. What's a transaction? What are "all of these"? What does it mean for a transaction to be loaded?