On Wed, Nov 4, 2009 at 1:33 PM, Bryn M. Reeves <bmr@xxxxxxxxxx> wrote: > On Wed, 2009-11-04 at 13:13 +0000, Dan Track wrote: >> On Wed, Nov 4, 2009 at 1:10 PM, Dan Track <dan.track@xxxxxxxxx> wrote: >> > Hi, >> > >> > I'm running a command like this: >> > >> > for i in server1 server2;do ssh root@$i "`hostname`";done. >> > >> > However the hostname command always outputs the hostname of the server >> > that the above command is run from. I'd like to know how to run this >> > hostname command so that it actually runs on server 1, server2 etc.. >> > >> > Thanks >> > Dan >> > >> >> Sorry just to add the actual script was like this: >> >> for i in server1 server2;do ssh root@$i "DNSNAME=\"basename >> \`hostname\`\";echo $DNSNAME";done > > Not sure why you're setting a variable here but to have "basename" run > as a command and assign the output to DNSNAME you need to have basename > inside a pair of backticks too. > > You'll then hit another problem because you want to have nested > backticks (one pair for basename and another for hostname). Bash > supports '$()' as an alternative to backticks that does allow nesting - > writing $(hostname) is equivalent to `hostname` and allows you to write > $(basename $(hostname)). > > I'm not sure basename is going to do what you want here though - are you > looking for the short host name or the domain name? The basename command > separates components of a path based on the '/' (or whatever the system > defined path separator is). E.g.: > > $ DNS=$(basename $(hostname)) > $ echo $DNS > breeves.fab.redhat.com > > If you just want the short hostname you can pass -s to hostname: > > $ ssh pe1950-1.gsslab hostname -s > pe1950-1 > > Or the domain with -d: > > $ ssh pe1950-1.gsslab hostname -d > gsslab.fab.redhat.com > > Have a look at the man page for hostname for more options. > > Regards, > Bryn. Hi Bryn, Many thanks. I tried hostname -s but I keep getting the following: hostname: Host name lookup failure This may be because the hostname's are short already e.g just "server1" instead of "server1.example.com" I've updated teh script to your recommendations but I still get the local hosts hostname in teh output instead of the remote servers hostname. Any other thoughts? I now run the following: for i in server1 server2;do ssh root@$i "DNSNAME=$(basename $(hostname)$);echo $DNSNAME";done Thanks Dan -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
