How to comment out an arbitrary range of lines using bash?

Question

Say I have the following file.txt

some line 

{
  hey it's me, another line
}

# START FOO
These lines
need to be commented
out
# END FOO

Some other line

How could I comment out all lines between the markers # START FOO and # END FOO in bash? Is it possible to do it in a one-liner?

see https://stackoverflow.com/questions/38972736/how-to-print-lines-between-two-patterns-inclusive-or-exclusive-in-sed-awk-or ... it should get you started.. — Sundeep, Oct 09 '19 at 02:33
Since you have been around here for a long time, you should at least show what you have tried. — Jotne, Oct 09 '19 at 04:55

Šerg · Answer 1 · 2019-10-10T07:14:42.763

4

Try this:

sed '/START FOO/,/END FOO/s/^/#/' file.txt

edited Oct 10 '19 at 07:14

answered Oct 09 '19 at 09:49

Šerg

1 Answers1