VMware Fusion connect to guest from host only

In VMware (I use VMware Fusion), sometimes you just want to connect from host (MacOS in my base) to your guest OS.
It's kind of funny how few instructions you can find on how to do it.

First of all, it seems there is no specific "guest" hostname that VMware created your guest automatically.  Something like a "client" hostname Citrix provide its tenants.

Second, it was kind of surprisingly easy if you configure your guest to Host-only (or even NAT) model.  There would be relatively easy!!!

If your guest is configured to connect to Host-only network, then you should be able to access it at 192.168.133.128 - 192.168.133.254 range, depending on the sequence of your VM starts (i.e. your first VM started with Host-only network would have IP address 192.168.133.128)

Your guest OS will be relatively safe in this case, because there would be no route to the outside world, as long as your host is free of malware, etc.

Similarly, your host can also connect to your guest that is configured as NAT.  The address of that would be in the 172.16.210.128 - 172.16.210.254 range, again depending on the sequence the guests started.

Here, you might have a little bit risk as the NAT means your guest would be able to see outside world, and you might also get exposed somewhat.

BUT, you may ask, "I want to use Bridge model" for my guest OS, how can I access my guest from my host network?

Well, it turns out easier than most post I can find online (you will need to shutdown your VM for the following):
You just need to create a new network adaptor for your VM, add a new device, "Network Adapter" in the settings for this VM, it will then add "Network Adapter 2" into your VM settings.  Open this new one from your settings page, and check the "Connect Network Adapter" (it should be checked by default actually), and select "Private to my Mac" in the "This network adapter is configured to use:" list.
Start your VM guest, and you should see your guest has 2 network NIC now, and the second one is a host-only connection.  And now you can access your guest network from host using 192.168.133.128 address.

(Above was tested on VMware Fusion 10, it should work on other versions of VMware Fusion, and other VMware host should have similar settings as well, but I can't guarantee that).

ZMQ error Installing Jupyter on nVidia Jetson XT2

When you try to install jupyter with

pip install jupyter
 on Jetson XT2, you run into an error saying zmq build failed (see below for logs...

This is because libzmq is not installled on Jetson by default.  To make it work, you just need to install libzmq :

sudo apt-get update

sudo apt-get install libzmq3-dev

That's it, do pip install jupyter afterwards, you will have jupyter running on your Jetson XT2 in no time. 

************************************************

Configure: Autodetecting ZMQ settings...
Custom ZMQ dir:
creating build/temp.linux-aarch64-3.5/scratch/tmp
aarch64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -c /tmp/timer_createo4b3hvp9.c -o build/temp.linux-aarch64-3.5/scratch/tmp/timer_createo4b3hvp9.o
/tmp/timer_createo4b3hvp9.c:1:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
main (int argc, char **argv) {
^
/tmp/timer_createo4b3hvp9.c: In function ‘main’:
/tmp/timer_createo4b3hvp9.c:2:5: warning: implicit declaration of function ‘timer_create’ [-Wimplicit-function-declaration]
timer_create();
^
aarch64-linux-gnu-gcc -pthread build/temp.linux-aarch64-3.5/scratch/tmp/timer_createo4b3hvp9.o -o build/temp.linux-aarch64-3.5/scratch/a.out
build/temp.linux-aarch64-3.5/scratch/tmp/timer_createo4b3hvp9.o: In function `main':
/tmp/timer_createo4b3hvp9.c:2: undefined reference to `timer_create'
collect2: error: ld returned 1 exit status
aarch64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -Izmq/utils -Izmq/backend/cython -Izmq/devices -c build/temp.linux-aarch64-3.5/scratch/vers.c -o build/temp.linux-aarch64-3.5/scratch/vers.o
aarch64-linux-gnu-gcc -pthread build/temp.linux-aarch64-3.5/scratch/vers.o -lzmq -lrt -o build/temp.linux-aarch64-3.5/scratch/vers
ZMQ version detected: 2.2.0

Bad libzmq version: Detected ZMQ version: 2.2.0, but require ZMQ >= 3.2
Explicitly allow legacy zmq by specifying `--zmq=/zmq/prefix`

Failed with default libzmq, trying again with /usr/local
{'libraries': ['zmq'], 'include_dirs': ['/usr/local/include'], 'runtime_library_dirs': ['/usr/local/lib'], 'library_dirs': ['/usr/local/lib'], 'extra_link_args': []}
************************************************
Configure: Autodetecting ZMQ settings...
Custom ZMQ dir: /usr/local
aarch64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -c /tmp/timer_create6ro885h3.c -o build/temp.linux-aarch64-3.5/scratch/tmp/timer_create6ro885h3.o
/tmp/timer_create6ro885h3.c:1:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
main (int argc, char **argv) {
^
/tmp/timer_create6ro885h3.c: In function ‘main’:
/tmp/timer_create6ro885h3.c:2:5: warning: implicit declaration of function ‘timer_create’ [-Wimplicit-function-declaration]
timer_create();
^
Assembler messages:
Fatal error: can't create build/temp.linux-aarch64-3.5/scratch/tmp/timer_create6ro885h3.o: No such file or directory
aarch64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -I/usr/local/include -Izmq/utils -Izmq/backend/cython -Izmq/devices -c build/temp.linux-aarch64-3.5/scratch/vers.c -o build/temp.linux-aarch64-3.5/scratch/vers.o
aarch64-linux-gnu-gcc -pthread build/temp.linux-aarch64-3.5/scratch/vers.o -L/usr/local/lib -Wl,--enable-new-dtags,-R/usr/local/lib -lzmq -lrt -o build/temp.linux-aarch64-3.5/scratch/vers
ZMQ version detected: 2.2.0

Bad libzmq version: Detected ZMQ version: 2.2.0, but require ZMQ >= 3.2
ZMQ_PREFIX=/usr/local
Explicitly allow legacy zmq by specifying `--zmq=/zmq/prefix`

************************************************
Warning: Couldn't find an acceptable libzmq on the system.

If you expected pyzmq to link against an installed libzmq, please check to make sure:

* You have a C compiler installed
* A development version of Python is installed (including headers)
* A development version of ZMQ >= 3.2 is installed (including headers)
* If ZMQ is not in a default location, supply the argument --zmq=
* If you did recently install ZMQ to a default location,
try rebuilding the ld cache with `sudo ldconfig`
or specify zmq's location with `--zmq=/usr/local`

You can skip all this detection/waiting nonsense if you know
you want pyzmq to bundle libzmq as an extension by passing:

`--zmq=bundled` ************************************************
Configure: Autodetecting ZMQ settings...
Custom ZMQ dir:
creating build/temp.linux-aarch64-3.5/scratch/tmp
aarch64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -c /tmp/timer_createo4b3hvp9.c -o build/temp.linux-aarch64-3.5/scratch/tmp/timer_createo4b3hvp9.o
/tmp/timer_createo4b3hvp9.c:1:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
main (int argc, char **argv) {
^
/tmp/timer_createo4b3hvp9.c: In function ‘main’:
/tmp/timer_createo4b3hvp9.c:2:5: warning: implicit declaration of function ‘timer_create’ [-Wimplicit-function-declaration]
timer_create();
^
aarch64-linux-gnu-gcc -pthread build/temp.linux-aarch64-3.5/scratch/tmp/timer_createo4b3hvp9.o -o build/temp.linux-aarch64-3.5/scratch/a.out
build/temp.linux-aarch64-3.5/scratch/tmp/timer_createo4b3hvp9.o: In function `main':
/tmp/timer_createo4b3hvp9.c:2: undefined reference to `timer_create'
collect2: error: ld returned 1 exit status
aarch64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -Izmq/utils -Izmq/backend/cython -Izmq/devices -c build/temp.linux-aarch64-3.5/scratch/vers.c -o build/temp.linux-aarch64-3.5/scratch/vers.o
aarch64-linux-gnu-gcc -pthread build/temp.linux-aarch64-3.5/scratch/vers.o -lzmq -lrt -o build/temp.linux-aarch64-3.5/scratch/vers
ZMQ version detected: 2.2.0

Bad libzmq version: Detected ZMQ version: 2.2.0, but require ZMQ >= 3.2
Explicitly allow legacy zmq by specifying `--zmq=/zmq/prefix`

Failed with default libzmq, trying again with /usr/local
{'libraries': ['zmq'], 'include_dirs': ['/usr/local/include'], 'runtime_library_dirs': ['/usr/local/lib'], 'library_dirs': ['/usr/local/lib'], 'extra_link_args': []}
************************************************
Configure: Autodetecting ZMQ settings...
Custom ZMQ dir: /usr/local
aarch64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -c /tmp/timer_create6ro885h3.c -o build/temp.linux-aarch64-3.5/scratch/tmp/timer_create6ro885h3.o
/tmp/timer_create6ro885h3.c:1:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
main (int argc, char **argv) {
^
/tmp/timer_create6ro885h3.c: In function ‘main’:
/tmp/timer_create6ro885h3.c:2:5: warning: implicit declaration of function ‘timer_create’ [-Wimplicit-function-declaration]
timer_create();
^
Assembler messages:
Fatal error: can't create build/temp.linux-aarch64-3.5/scratch/tmp/timer_create6ro885h3.o: No such file or directory
aarch64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -I/usr/local/include -Izmq/utils -Izmq/backend/cython -Izmq/devices -c build/temp.linux-aarch64-3.5/scratch/vers.c -o build/temp.linux-aarch64-3.5/scratch/vers.o
aarch64-linux-gnu-gcc -pthread build/temp.linux-aarch64-3.5/scratch/vers.o -L/usr/local/lib -Wl,--enable-new-dtags,-R/usr/local/lib -lzmq -lrt -o build/temp.linux-aarch64-3.5/scratch/vers
ZMQ version detected: 2.2.0

Bad libzmq version: Detected ZMQ version: 2.2.0, but require ZMQ >= 3.2
ZMQ_PREFIX=/usr/local
Explicitly allow legacy zmq by specifying `--zmq=/zmq/prefix`

************************************************
Warning: Couldn't find an acceptable libzmq on the system.

If you expected pyzmq to link against an installed libzmq, please check to make sure:

* You have a C compiler installed
* A development version of Python is installed (including headers)
* A development version of ZMQ >= 3.2 is installed (including headers)
* If ZMQ is not in a default location, supply the argument --zmq=
* If you did recently install ZMQ to a default location,
try rebuilding the ld cache with `sudo ldconfig`
or specify zmq's location with `--zmq=/usr/local`

You can skip all this detection/waiting nonsense if you know
you want pyzmq to bundle libzmq as an extension by passing:

`--zmq=bundled`

I will now try to build libzmq as a Python extension
unless you interrupt me (^C) in the next 10 seconds...

1...
************************************************
Using bundled libzmq
already have bundled/zeromq
already have platform.hpp
************************************************
checking for timer_create
creating build/temp.linux-aarch64-3.5/tmp
aarch64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -c /tmp/timer_createvil73p56.c -o build/temp.linux-aarch64-3.5/tmp/timer_createvil73p56.o
/tmp/timer_createvil73p56.c:1:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
main (int argc, char **argv) {
^
/tmp/timer_createvil73p56.c: In function ‘main’:
/tmp/timer_createvil73p56.c:2:5: warning: implicit declaration of function ‘timer_create’ [-Wimplicit-function-declaration]
timer_create();
^
aarch64-linux-gnu-gcc -pthread build/temp.linux-aarch64-3.5/tmp/timer_createvil73p56.o -o build/temp.linux-aarch64-3.5/a.out
build/temp.linux-aarch64-3.5/tmp/timer_createvil73p56.o: In function `main':
/tmp/timer_createvil73p56.c:2: undefined reference to `timer_create'
collect2: error: ld returned 1 exit status
no timer_create, linking librt
************************************************
Fatal: Cython-generated file 'zmq/backend/cython/_device.c' not found.
Cython >= 0.20 is required to compile pyzmq from a development branch.
Please install Cython or download a release package of pyzmq.


----------------------------------------
Command "/usr/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-jx8cxtk1/pyzmq/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-9xas1kip-record/install-record.txt --single-version-externally-managed --compile --user --prefix=" failed with error code 1 in /tmp/pip-build-jx8cxtk1/pyzmq/
You are using pip version 8.1.1, however version 18.0 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.

I will now try to build libzmq as a Python extension
unless you interrupt me (^C) in the next 10 seconds...

1...
************************************************
Using bundled libzmq
already have bundled/zeromq
already have platform.hpp
************************************************
checking for timer_create
creating build/temp.linux-aarch64-3.5/tmp
aarch64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -c /tmp/timer_createvil73p56.c -o build/temp.linux-aarch64-3.5/tmp/timer_createvil73p56.o
/tmp/timer_createvil73p56.c:1:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
main (int argc, char **argv) {
^
/tmp/timer_createvil73p56.c: In function ‘main’:
/tmp/timer_createvil73p56.c:2:5: warning: implicit declaration of function ‘timer_create’ [-Wimplicit-function-declaration]
timer_create();
^
aarch64-linux-gnu-gcc -pthread build/temp.linux-aarch64-3.5/tmp/timer_createvil73p56.o -o build/temp.linux-aarch64-3.5/a.out
build/temp.linux-aarch64-3.5/tmp/timer_createvil73p56.o: In function `main':
/tmp/timer_createvil73p56.c:2: undefined reference to `timer_create'
collect2: error: ld returned 1 exit status
no timer_create, linking librt
************************************************
Fatal: Cython-generated file 'zmq/backend/cython/_device.c' not found.
Cython >= 0.20 is required to compile pyzmq from a development branch.
Please install Cython or download a release package of pyzmq.


----------------------------------------
Command "/usr/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-jx8cxtk1/pyzmq/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-9xas1kip-record/install-record.txt --single-version-externally-managed --compile --user --prefix=" failed with error code 1 in /tmp/pip-build-jx8cxtk1/pyzmq/
You are using pip version 8.1.1, however version 18.0 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.

MacOS R Studio via AnaConda installing nloptr

If you installed AnaConda and used RStudio coming with it, You might have run into issues install.packages("car")
It would tell you Configuration errors trying to compile nloptr package telling you can't compile C++ code and ask you to try --host option.

Basically the failure is because car depends on nloptr package and newest nloptr package is only distribute as source (Mac binary is several years behind). Yet you can't compile C++ code from within R Studio (actually R) that was launched from Conda nevigator.

There is no solutions posted online although quite a few people ran into this issue.
The solution is to install nloptr using conda command (sudo)

Like:
conda install -c conda-forge r-nloptr 

You may need to sudo on MacOS (or Linux)

This command actually works on MacOS, Linux and windows.