dockerfile.run

sswap

tools to wipe files, free disk space, swap and memory

Debian

RUN apt-get update && \
    apt-get install -y secure-delete

Ubuntu

RUN apt-get update && \
    apt-get install -y secure-delete

Alpine

RUN apk add secure-delete

Kali Linux

RUN apt-get update && \
    apt-get install -y secure-delete

Raspbian

RUN apt-get update && \
    apt-get install -y secure-delete

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