dockerfile.run – certtool

certtool

GNU TLS library - commandline utilities

Debian

RUN apt-get update && \
    apt-get install -y gnutls-bin

Ubuntu

RUN apt-get update && \
    apt-get install -y gnutls-bin

Alpine

RUN apk add gnutls

Arch Linux

RUN pacman -S --noconfirm gnutls

Kali Linux

RUN apt-get update && \
    apt-get install -y gnutls-bin

CentOS

RUN yum install -y gnutls-utils

Fedora

RUN dnf install -y gnutls-utils

Raspbian

RUN apt-get update && \
    apt-get install -y gnutls-bin

click the source code to copy install certtool on any operating system with command-not-found.com