Install liboath0 by entering the following commands in the terminal:
sudo apt update sudo apt install liboath0
OATH Toolkit Liboath library
The OATH Toolkit makes it easy to build one-time password authentication systems. It contains shared libraries, command line tools and a PAM module. Supported technologies include the event-based HOTP algorithm (RFC4226) and the time-based TOTP algorithm (RFC6238). OATH stands for Open AuTHentication, which is the organization that specify the algorithms. For managing secret key files, the Portable Symmetric Key Container (PSKC) format described in RFC6030 is supported. . This package includes the Liboath shared library that is used by applications. You normally don't need to install it manually.