Problem finding variable data

battles · 10-10-2014, 01:56 PM

varld=abc
sed -n -e '/$varld/! w dummy4.txt' -e '/$varld/{:a;n;w dummy5.txt' -e 'ba}' dummy3.txt

The instruction above cannot fine the 'abc' in varld. If I hard code the 'abc' into the instruction, as below, it works.

sed -n -e '/abc/! w dummy4.txt' -e '/abc/{:a;n;w dummy5.txt' -e 'ba}' dummy3.txt

Can someone tell me how to get the sed to find and use the data in $varld?

Thanks.

Keith Hedger · 10-10-2014, 06:01 PM

Quote:

Originally Posted by battles

varld=abc
sed -n -e '/$varld/! w dummy4.txt' -e '/$varld/{:a;n;w dummy5.txt' -e 'ba}' dummy3.txt

The instruction above cannot fine the 'abc' in varld. If I hard code the 'abc' into the instruction, as below, it works.

sed -n -e '/abc/! w dummy4.txt' -e '/abc/{:a;n;w dummy5.txt' -e 'ba}' dummy3.txt

Can someone tell me how to get the sed to find and use the data in $varld?

Thanks.

the single quotes used in the sed's should be double quotes otherwise $varld is taken literally instead of being replaced by the contents of the variable

battles · 10-10-2014, 06:07 PM

Thanks. I'll have to change all single quotes in my sed examples to double.