Question

How to convert a string to lowercase in Bash

Answer 1

s="BASH IS A UNIX SHELL AND COMMAND LANGUAGE"

echo "$s" | awk '{print tolower($0)}'



# run:
#
# bash is a unix shell and command language
#

 

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Answer 2

s="BASH IS A UNIX SHELL AND COMMAND LANGUAGE"

echo "$s" | tr '[:upper:]' '[:lower:]'



# run:
#
# bash is a unix shell and command language
#

 

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Answer 3

s="BASH IS A UNIX SHELL AND COMMAND LANGUAGE"

s="${s,,}"

echo "$s" 



# run:
#
# bash is a unix shell and command language
#

 

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