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How to uppercase matching line when string found?

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# 1  
Old 08-22-2018
How to uppercase matching line when string found?
Hello,
Could you please help me how to search the string in a file, and when found; change the existing line to uppercase in command line?

I tried:
Code:
?whichcommand? -A "EXT" fileA | awk '{print tolower($0)}' | tee fileB

tr command simply converts entire file to uppercase but this is not what I need:

Code:
tr [:lower:] [:upper:] < fileA > fileB


fileA:

Code:
Use descriptive thread exterior or interior
Exterior thread descriptive use on interior
This line has been left empty
EXT line is here, please make it uppercase

expected output, fileB:
Code:
Use descriptive thread exterior or interior
Exterior thread descriptive use or interior
This line has been left empty
EXT LINE IS HERE, PLEASE MAKE IT UPPERCASE

many thanks
Boris
Last edited by baris35; 08-22-2018 at 08:34 AM.. Reason: extra info
# 2  
Old 08-22-2018
If your awk supports it :
Code:
gawk '/EXT/ { $0=toupper($0) }1 ' input.txt

Regards
Peasant.
This User Gave Thanks to Peasant For This Post:
baris35
# 3  
Old 08-22-2018
With GNU sed:
Code:
sed '/EXT/s/.*/\U&/' file

This User Gave Thanks to RudiC For This Post:
baris35
# 4  
Old 08-22-2018
Dear Peasant, Dear Rudic,
Thank you, both works nice.


Kind regards
Boris
# 5  
Old 08-22-2018
If you want to try sed, run this command after you have identified the line.
Code:
y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/

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