dosemu2 is an emulator for running DOS programs under linux. It can also serve as a VM to boot various DOSes.
Binary packages for ubuntu are available here: https://code.launchpad.net/~dosemu2/+archive/ubuntu/ppa
Binary packages for fedora are here: https://copr.fedorainfracloud.org/coprs/stsp/dosemu2
Binary packages for OpenSUSE are here: https://download.opensuse.org/repositories/home:/stsp2/openSUSE_Tumbleweed
Please send bug reports to https://github.com/dosemu2/dosemu2/issues
Just type dosemu to run an emulator.
Use dosemu -E <dos_cmd> to run <dos_cmd> and exit (add -T to not exit).
Use dosemu -K <unix_dir> -E <dos_cmd> or dosemu -K <unix_full_path>
to run DOS programs from unix directories.
Per-user configuration file can be created as ~/.dosemu/.dosemurc.
Add your custom settings there.
Look into the global configuration file /etc/dosemu/dosemu.conf for
existing settings, their descriptions and default values, and modify
the local config accordingly. $_hdimage is probably the first setting
to look into, as it configures the host fs access.
Create c:\userhook.sys and/or c:\userhook.bat files to customize your
boot sequence. userhook.sys can contain the config.sys directives and
userhook.bat can contain custom boot commands.
Drive C: is usually located at ~/.dosemu/drive_c. You can add DOS
programs there. Or you can run dosemu -d <unix_dir> to mount the
<unix_dir> as a new DOS drive.