Translate upper case to lower
tr A-Z a-z < inputfile > outputfile
cat inputfile|tr A-Z a-z
Translate braces into parenthesis
tr '{}' '()' < inputfile > outputfile
Translate white-space to tabs
echo "This is for testing" | tr [:space:] '\t'
Squeeze repetition of characters using -s
echo "This is for testing" | tr [:space:] '\t'
We can use -s option to squeeze the repetition of characters.
echo "This is for testing" | tr -s [:space:] '\t'
convert multiple continuous spaces with a single space
echo "This is for testing" | tr -s [:space:] ' '
Delete specified characters using -d option
echo "the geek stuff" | tr -d 't'
To remove all the digits from the string, use
echo "my username is 432234" | tr -d [:digit:]
Complement the sets using -c option
echo "my username is 432234" | tr -cd [:digit:]
Remove all non-printable character from a file
tr -cd [:print:] < file.txt
Join all the lines in a file into a single line
tr -s '\n' ' ' < file.txt
