---
syntax: markdown
tags: [tldr, common]
source: https://github.com/tldr-pages/tldr.git
---
# oathtool

> OATH one-time password tool.
> More information: <https://www.nongnu.org/oath-toolkit/oathtool.1.html>.

- Generate TOTP token (behaves like Google Authenticator):

`oathtool --totp {{[-b|--base32]}} "{{secret}}"`

- Generate a TOTP token for a specific time:

`oathtool --totp {{[-N|--now]}} "{{2004-02-29 16:21:42}}" {{[-b|--base32]}} "{{secret}}"`

- Validate a TOTP token:

`oathtool --totp {{[-b|--base32]}} "{{secret}}" "{{token}}"`
