UNIX for Beginners Questions & Answers

I would want to only remove the lines between PATTERN1(aaa) and PATTERN2(ccc), excluding the others lines where the patterns matches.

I trying to delete the empty line between PATTERN1(aaa) and PATTERN2(ccc), line 8 in my example...This line will be no all times in same location, that is the reason, why I try to remove it using the 2 patterns.

Essentially it boils down to: "If a blank line is found between aaa and ccc then remove it..

input file

Code:

aaa 409
bbb 201

122 0.98
aaa 1.47
aaa 0.00
aaa 0.00

ccc 0.00
121 0.01
135 1.99

output file

Code:

aaa 409
bbb 201

122 0.98
aaa 1.47
aaa 0.00
aaa 0.00
ccc 0.00
121 0.01
135 1.99

Code:

attempts

Code:

sed  '/aaa/,/ccc/{//p;d;}' file
sed '/aaa/,/ccc/{//!d}' file

Code:

awk '/aaa/{g=1;next}/ccc/{g=0;next}g' file

Thanks in advance