Remove end of values in file

Shell Programming and Scripting
1

leviathan:/lcl/apps/Tivoli/netcool/omnibus/bin>more pmonfile.dat
entp_stdby
ot1p_stdby
lawp_stdby

I am wonder how to remove the _stdby from all the values in this dat file using #!/bin/ksh

Thanks!

2

Here is one way, using sed:

#!/bin/ksh

pfile="pmonfile.dat"
tmpfile="pmonfile.tmp"

sed -e '1,$s/_stdby$//g' pmonfile.dat > $tmpfile

mv -f $tmpfile $pfile

how's that?

3

One ksh script coming up:

#!/bin/ksh
while read line; do
  echo ${line%_stdby}
done <pmonfile.dat >pmonfile.dat.tmp && mv -f pmonfile.dat.tmp pmonfile.dat
4 
sed 's/_stdby$//' pmonfile.dat
5

For any shell:

cut -d_ -f1 pmonfile.dat