Problem installing a 6LoWPAN enabled Linux kernel for nRF51 IoT SDK

[Max]

I followed the instructions in developer.nordicsemi.com/.../a00058.html and reached Obtaining the kernel: Option 2: Native build. I failed at step 3 and the error message goes like this:

pi@raspberrypi ~/raspbian/linux $ make –j5 && make –j5 modules

scripts/kconfig/conf --silentoldconfig Kconfig

make: *** No rule to make target '–j5'. Stop.

I also tries the next step (step 4) but failed too as below: pi@raspberrypi ~/raspbian/linux $ CONCURRENCY_LEVEL=5 DEB_HOST_ARCH=armhf fakeroot make-kpkg --append-to-version –name_of_your_choice --revision date +%Y%m%d%H%M%S --initrd kernel_image kernel_headers

Error: The extended version may only contain lowercase alphanumerics and the characters - + .

The current value is: –name_of_your_choice

Aborting.

Please help.

[Max]

None of them work. Error messages:

pi@raspberrypi ~/raspbian/linux $ make –j5

make: *** No rule to make target '–j5'. Stop.

pi@raspberrypi ~/raspbian/linux $ make –j5 modules

make: *** No rule to make target '–j5'. Stop.

pi@raspberrypi ~/raspbian/linux $ make modules –j5

CHK include/config/kernel.release

CHK include/generated/uapi/linux/version.h

CHK include/generated/utsrelease.h

make[1]: 'include/generated/mach-types.h' is up to date.

CALL scripts/checksyscalls.sh

CHK include/generated/compile.h

BC kernel/time/timeconst.h

/bin/sh: 1: bc: not found

kernel/time/Makefile:32: recipe for target 'kernel/time/timeconst.h' failed

make[2]: *** [kernel/time/timeconst.h] Error 127

scripts/Makefile.build:403: recipe for target 'kernel/time' failed

make[1]: *** [kernel/time] Error 2

Makefile:947: recipe for target 'kernel' failed

make: *** [kernel] Error 2

pi@raspberrypi ~/raspbian/linux $ apt-get update&&apt-get dist-upgrade

E: Could not open lock file /var/lib/apt/lists/lock - open (13: Permission denied)

E: Unable to lock directory /var/lib/apt/lists/

E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied)

E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?