terminal

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user@linux:~$

tr - Character Translation

Learn to translate, delete, and squeeze characters with the tr command.

Step 1

Convert lowercase text to uppercase using tr. Pipe some text through tr with character ranges.

Type: echo 'hello world' | tr 'a-z' 'A-Z'

echo 'hello world' | tr 'a-z' 'A-Z'

Step 2

Use tr -d to delete all digits from a string.

Step 3

Use tr -s to squeeze repeated spaces into a single space.

Step 4

Use character classes [:upper:] and [:lower:] to convert case.