This guide was written to setup Linux® compatibility for FreeBSD. This guide was done in GhostBSD, should work for FreeBSD and other BSD derivatives.

In order to load Linux kernel module, run the following command:

#kldload linux # you can load linux64 kernel module as well

To check if aforementioned module is loaded, run #kldstat . You should see in the output.

Next you will need to install Linux® libraries and binaries from ports tree ( or pkg if you wish )

#cd /usr/ports/emulators/linux_base-c6 && make config-recursive && make install clean

Once you are done with above steps, go ahead and download and .rpm package to test your setup. To install .rpmpackage, you will need to install archivers/rpm4 . The installation command is similar to linux_base-c6. Now run following commands in order:

• #cd /compat/linux

-#rpm2cpio <  **<path_to_rpm_package>** | cpio -id

For this guide, I have installed htop application, so to run, change directory to compat/linux and run htop binary. It should work, it worked for me.

Update: below steps get Linux emulator running:

Enable Linux Emulation - BSD

kldload linux

kldload linux64

pkg install emulators/linux_base-c7

pkg install archivers/rpm4

put in /etc/fstab

[code lang=text]
linprocfs /compat/linux/proc linprocfs rw 0 0

linsysfs /compat/linux/sys linsysfs rw 0 0

tmpfs /compat/linux/dev/shm tmpfs rw,mode=1777 0 0

[/code]

mount /compat/linux/proc

mount /compat/linux/sys

mount /compat/linux/dev/shm

mkdir -p /var/lib/rpm

/usr/local/bin/rpm --initdb

echo 'linux_enable="YES"'>>/etc/rc.conf

Resource: Chapter 10. Linux® Binary Compatibility.