---
name: "fastaq-replace_bases"
section: "1"
platform: "linux"
package: "fastaq"
version: "3.17.0-9"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/fastaq-replace_bases"
---

# fastaq-replace\_bases(1)

Replaces all occurrences of one letter with another

## NAME

fastaq\_replace\_bases - Replaces all occurrences of one letter with another

## DESCRIPTION

usage: fastaq\_replace\_bases \<infile\> \<outfile\> \<old\> \<new\>

Replaces all occurrences of one letter with another

### positional arguments:

- infile

  Name of input file

- outfile

  Name of output file

- old

  Base to be replaced

- new

  Replace with this letter

### options:

- **-h**, **--help**

  show this help message and exit