> > > At this point I want to get rid of eveything samba and start over. Whats > > > the best way to do that? > > > > rpm -e $(rpm -qa 'samba-*') > > > > Then install a new samba which was built for your platform. > > On Fri, 2003-10-17 at 23:34, mysql@xxxxxxxxx wrote: > Thanks for the reply!! > > The rpm -e and the 'samba-*' I understand, but where does the $(rpm -qa > 'samba-*') come from? > I ask this only because I really want to learn Linux - if I had stuck > with it 2 years ago, I would not have to ask now ... > it is called command substitution. in bash there are two ways to achieve it. the old way is to use backticks `command` and the better way imnsho is using $(command) this way you can nest commands. what happens is that when the command line is parsed by bash the stuff in $( ) gets executed and the output of the command gets subsituted in its place hence the name. So, in this case the output of the command rpm -qa 'samba-*' gets added as arguments to the rpm -e command and of course causes rpm to try and erase all the packages that begin with samba-. This is way cool and allows all sorts of intricate stuff to be accomplished in oneliners. man bash is a tremendously dense document that I read at least parts of over and over again to add tools to my programming tool box. I have read it beginning to end several times and at least now I sort of remember that there was something in there and can usually search for terms and find the solution fairly quickly. Tonights example was wanting to find out if the file name I had in a variable contained either mpg or mpeg the solution I found was that be setting the extglob on using shopt -s extglob I could do if ( [[ $myvar == *mp?(e)g ]] );then blah blah I started my search using /string a bunch of n's and I found the term pattern matching and off I went. if you are not good at using man pages man man and man less are good reads especially man less. less is definitely more :) bash is truly amazing. Read the man page an glean as much as you can and then read it again in a month after dinking with it some and see if there aren't more nuggets to be found each time you reread it. HTH Bret -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
