topic Re: remove leading character in Operating System - HP-UX

remove leading character

John Roy Arendain — Mon, 10 Nov 2003 21:02:29 GMT

Please advise what command do I use to remove the leading character "%" from the output of command "bdf â l | awk â {print $5}â "

Re: remove leading character

Michael Steele_2 — Mon, 10 Nov 2003 21:29:47 GMT

'^' for leading character.

Maybe:

# sed 's/^//g' filename

Try this handy SED URL:

http://www-h.eng.cam.ac.uk/help/tpl/unix/sed.html

Re: remove leading character

Bill Hassell — Mon, 10 Nov 2003 21:51:21 GMT

Or you can use tr:

bdf | tr "%" " " | awk '{print $5}'

Re: remove leading character

Rajeev Shukla — Mon, 10 Nov 2003 21:52:35 GMT

Use
bdf|awk '{print $5}'|sed 's/%//g'

Re: remove leading character

Rajeev Shukla — Mon, 10 Nov 2003 21:54:41 GMT

And if you want %used to be left as it is try

bdf|awk '{print $5}'|sed 's/%$//g'

Re: remove leading character

John Roy Arendain — Mon, 10 Nov 2003 22:08:51 GMT

Thanks Guys! our File system monitoring script is now complete. I am attaching the script file.

Re: remove leading character

Duncan Galbraith — Tue, 11 Nov 2003 18:50:23 GMT

The bdf line in your script will only work for short filesystem names. Perhaps you are lucky and only have short names but on many systems the output of bdf for a filesystem often covers 2 lines so your bdf line might be better something like:
bdf ${FS[$i]} | grep " ${FS[$i]}$" | awk '{ print $(NF-1) }' | sed 's/%//'

Re: remove leading character

Graham Cameron_1 — Wed, 12 Nov 2003 03:36:17 GMT

And if you want to combine Duncan's fix to cope with > 1 line, and avoid grep and sed, doing it all with awk in one shot, how about.

bdf ${FS[$i]} |awk '/^Filesystem/ {next} (NF==1) {getline} {print substr($(NF-1),1,length($(NF-1)-1))}'

-- Graham