How to make sed case insensitive

vickylife · #1 (**permalink**) 01-06-2009

I need to remove a pattern say, ABCD whether it is in uppercase or lowercase from a string. How to do it using SED?
for example
ABCDEF should output to EF
abcdEF should also output to EF

Christoph Spohr · #2 (**permalink**) 01-06-2009

Hi,

Code:

sed 's/ABCD//i' file

Should do it.

HTH Chris

frostmourn · #3 (**permalink**) 01-06-2009

sed 's/[Aa][Bb][Cc][Dd]\(..\)/\1/' file

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