ssh and passing second arguments through awk
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From: K K on 11 Aug 2010 13:06 All bash-2.03$ cat /tmp/output/1settmp 192.168.112.14 192.168.4.14 192.168.112.16 192.168.4.16 I have entries like the above in the file /tmp/output/1settmp In the above file I have to take the first column entry(IP) and ssh into that and has to ping the corresponding second column ip Wrote a script like this while read line; do echo $line | ssh -t `awk '{print $1}'` -l user "/ bin/ping -c 4 `awk '{print $2}`"; done < /tmp/output/1settmp also this one while read line; do echo $line | ssh -t `cut -d' ' -f1` -l user "/bin/ ping -c 4 `cut -d' ' -f2`"; done < /tmp/output/1settmp But the problem here is script is taking first column properly but it is not taking the second column. Always its like second column is empty. I tried exporting the variable (line) but it didnt help (as they are different machines) and also tried escape character like awk '{print \ $2}' no luck Please any help on this. Thanks
From: Alan Curry on 11 Aug 2010 18:22 In article <f39dad35-0458-49a0-a43e-47698f951b51(a)v41g2000yqv.googlegroups.com>, K K <mail2rkarthik(a)gmail.com> wrote: > >Wrote a script like this > >while read line; do echo $line | ssh -t `awk '{print $1}'` -l user "/ >bin/ping -c 4 `awk '{print $2}`"; done < /tmp/output/1settmp Let me clean that up for you... while read pinger pingee; do ssh -t $pinger -l user "ping -c 4 $pingee" < /dev/null done < thefile >also this one > >while read line; do echo $line | ssh -t `cut -d' ' -f1` -l user "/bin/ >ping -c 4 `cut -d' ' -f2`"; done < /tmp/output/1settmp > >But the problem here is script is taking first column properly but it >is not taking the second column. >Always its like second column is empty. Of course the second `...` is empty. The first one has already read the line from the pipe. There's nothing left for the second cut or awk to read. -- Alan Curry
From: K K on 12 Aug 2010 03:06 Thanks for the reply. Is there any work around for this. Thanks Karthik On Aug 12, 6:22 am, pac...(a)kosh.dhis.org (Alan Curry) wrote: > In article <f39dad35-0458-49a0-a43e-47698f951...(a)v41g2000yqv.googlegroups..com>, > K K <mail2rkart...(a)gmail.com> wrote: > > > > >Wrote a script like this > > >while read line; do echo $line | ssh -t `awk '{print $1}'` -l user "/ > >bin/ping -c 4 `awk '{print $2}`"; done < /tmp/output/1settmp > > Let me clean that up for you... > > while read pinger pingee; do > ssh -t $pinger -l user "ping -c 4 $pingee" < /dev/null > done < thefile > > >also this one > > >while read line; do echo $line | ssh -t `cut -d' ' -f1` -l user "/bin/ > >ping -c 4 `cut -d' ' -f2`"; done < /tmp/output/1settmp > > >But the problem here is script is taking first column properly but it > >is not taking the second column. > >Always its like second column is empty. > > Of course the second `...` is empty. The first one has already read the line > from the pipe. There's nothing left for the second cut or awk to read. > > -- > Alan Curry
From: K K on 12 Aug 2010 12:50 I had made some modification in the script while read line; do a=`echo $line|awk '{ print $1}'`; b=`echo $line| awk '{ print $2}'`; ssh $a -l tiki "ping -c 4 $b"; done < /tmp/output/ 1settmp But it still misses out the second pair 192.168.112.16 192.168.4.16 But the first pair is working fine 192.168.112.14 192.168.4.14 from the file /tmp/output/1settmp. Its like the script lost the control after doing ssh. Any suggestions on this. Thanks Karthik On Aug 12, 6:22 am, pac...(a)kosh.dhis.org (Alan Curry) wrote: > In article <f39dad35-0458-49a0-a43e-47698f951...(a)v41g2000yqv.googlegroups..com>, > K K <mail2rkart...(a)gmail.com> wrote: > > > > >Wrote a script like this > > >while read line; do echo $line | ssh -t `awk '{print $1}'` -l user "/ > >bin/ping -c 4 `awk '{print $2}`"; done < /tmp/output/1settmp > > Let me clean that up for you... > > while read pinger pingee; do > ssh -t $pinger -l user "ping -c 4 $pingee" < /dev/null > done < thefile > > >also this one > > >while read line; do echo $line | ssh -t `cut -d' ' -f1` -l user "/bin/ > >ping -c 4 `cut -d' ' -f2`"; done < /tmp/output/1settmp > > >But the problem here is script is taking first column properly but it > >is not taking the second column. > >Always its like second column is empty. > > Of course the second `...` is empty. The first one has already read the line > from the pipe. There's nothing left for the second cut or awk to read. > > -- > Alan Curry
From: Ben Bacarisse on 12 Aug 2010 20:40
Top posting is bad. :-( I've re-ordered your reply. K K <mail2rkarthik(a)gmail.com> writes: > On Aug 12, 6:22 am, pac...(a)kosh.dhis.org (Alan Curry) wrote: >> In article <f39dad35-0458-49a0-a43e-47698f951...(a)v41g2000yqv.googlegroups.com>, >> K K <mail2rkart...(a)gmail.com> wrote: >> >Wrote a script like this >> >> >while read line; do echo $line | ssh -t `awk '{print $1}'` -l user "/ >> >bin/ping -c 4 `awk '{print $2}`"; done < /tmp/output/1settmp >> >> Let me clean that up for you... >> >> while read pinger pingee; do >> ssh -t $pinger -l user "ping -c 4 $pingee" < /dev/null >> done < thefile When Alan said "tidy" up he did not mean simply re-writing your non-working script in another form. He was giving a the solution. >> >also this one >> >> >while read line; do echo $line | ssh -t `cut -d' ' -f1` -l user "/bin/ >> >ping -c 4 `cut -d' ' -f2`"; done < /tmp/output/1settmp >> >> >But the problem here is script is taking first column properly but it >> >is not taking the second column. >> >Always its like second column is empty. >> >> Of course the second `...` is empty. The first one has already read the line >> from the pipe. There's nothing left for the second cut or awk to >> read. > > Thanks for the reply. > Is there any work around for this. This part was just an explanation of why your version would not work. The fix is as above. -- Ben. |