`tr` command

Translate, squeeze or delete characters.

Text processing
Package coreutils
3 options · 6 examples

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Syntax
Common options
Examples
Guides
Related commands

Syntax

tr [options] set1 [set2]

Provided by the coreutils package. Run man tr for the full manual.

Common options

Option	What it does
`-d`	Delete characters in set1
`-s`	Squeeze repeated characters into one
`-c`	Use the complement of set1

Examples

Lowercase to uppercase
```
echo "hello" | tr a-z A-Z
```
Uppercase to lowercase
```
tr '[:upper:]' '[:lower:]' < file.txt
```
Delete digits
```
echo "abc123" | tr -d 0-9
```
Squeeze repeated spaces
```
tr -s ' ' < file.txt
```
Replace newlines with spaces
```
tr '\n' ' ' < list.txt
```
Remove Windows line endings
```
tr -d '\r' < win.txt > unix.txt
```

tr guides

TR Command in Linux: A Guide with Practical Examples Linux Commands · Updated Apr 2025

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