/Shell/Bash/Convert capital letters to lowercase in shell script

Convert capital letters to lowercase in shell script

Bash how to convert text to lowercase or uppercase

# Basic syntax:
tolower(string)
toupper(string)

# Example usage:
awk '{print tolower($0)}' input_file
# This prints every row ($0) converted to lowercase

awk '{print toupper($3)}' input_file
# This would print the third field ($3) converted to uppercase

Source: thomas-cokelaer.info

Convert capital letters to lowercase in shell script

x="HELLO"
echo $x  # HELLO

y=${x,,}
echo $y  # hello

z=${y^^}
echo $z  # HELLO

Source: stackoverflow.com

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