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Selecteing only non commented rows

 
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# 1  
Old 10-01-2008
Selecteing only non commented rows
Hi,

I have develop a script that will read a single line from file and do some operations.But now my problwm is that if in that file suppose 1 line is commented, then i have to ignore that line...Can anybody help me out to solve this issue?Smilie Details are:

Script:

HTML Code:
#!/bin/sh
Parmdir=/opt/home/xyz
cat $Parmdir/jobname.lst | while read line
do
some command
done
cat jobname.lst
HTML Code:
ABCD
EFGH
#AFFF
RRRRR
So in the above script i have to ignore the 3rd line.Smilie

Please help me.Smilie

Thanks In Advance!
# 2  
Old 10-01-2008
The simplest way would to add a simple grep that ignores lines starting with #... like so

cat $Parmdir/jobname.lst | grep -v ^# | while read line

The "^" character, in case you're not familiar, specifies the beginning of a line. So if we group that with the -v (invert matching, aka do not print matching lines) it states do not print any lines that begin with the hash mark. (#)

Enjoy!

Quote:
Originally Posted by Amey Joshi
Hi,

I have develop a script that will read a single line from file and do some operations.But now my problwm is that if in that file suppose 1 line is commented, then i have to ignore that line...Can anybody help me out to solve this issue?Smilie Details are:

Script:

HTML Code:
#!/bin/sh
Parmdir=/opt/home/xyz
cat $Parmdir/jobname.lst | while read line
do
some command
done
cat jobname.lst
HTML Code:
ABCD
EFGH
#AFFF
RRRRR
So in the above script i have to ignore the 3rd line.Smilie

Please help me.Smilie

Thanks In Advance!
 
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