Installation of Webmin differs little from the installation of other software under Gentoo.
With the emerge command as usual for the installation of Webmin:
# emerge webmin
Note that: If running the command the system responds by indicating that the packets are blocked:
emerge -av webmin
These are the packages that would be merged, in order:
Calculating dependencies... done!
!!! All ebuilds that could satisfy "app-admin/webmin" have been masked.
!!! One of the following masked packages is required to complete your request:
- app-admin/webmin-1.480 (masked by: ~x86 keyword)
For more information, see the MASKED PACKAGES section in the emerge
man page or refer to the Gentoo Handbook.
You can add this the file, but it will be at your own risk: