No rtl_tcp after 'go get github.com/bemasher/rtlamr'

[jcwren]

First, I know next to nothing about Go, so I'm probably doing something wrong. But I can generally follow instructions :)

Installed Go with apt-get install golang-go on my Debian x86 box, which installed golang-1.11-go golang-1.11-src golang-go golang-src

Ran go get github.com/bemasher/rtlamr per the instructions. No output, but do have ~/go/bin/rtlamr. There is also a ~/go/src/github.com/bemasher/rtltcp directory, but no rtc_tcp anywhere under ~/go.

Checked apt-cache search for rtltcp, rtl_tcp, rtl-tcp, didn't find anything, just in case I was supposed to install something from the repositories, but no-go on that.

So where does rtc_tcp come from?

[jcwren]

D'oh. Never mind, that's part of the rtl-sdr package.

[clandestine-avocado]

@jcwren I also know next to nothing about Go, and I'm probably doing something wrong too...but I can get rtlamr to run. I get a rtlamr: command not found error in the terminal. rtl_tcp seems to run fine, and outputs this:

$ rtl_tcp
Found 1 device(s):
  0:  Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Generic RTL2832U OEM
Found Rafael Micro R820T tuner
[R82XX] PLL not locked!
Tuned to 100000000 Hz.
listening...
Use the device argument 'rtl_tcp=127.0.0.1:1234' in OsmoSDR (gr-osmosdr) source
to receive samples in GRC and control rtl_tcp parameters (frequency, gain, ...).

I've run go get github.com/bemasher/rtlamr per the instructions. No output in the terminal, but I now have ~/go/bin/rtlamr so I think that worked. Any ideas? Hate to open a new issue when I'm pretty sure I'M the issue.

[bemasher]

What does the command which rtlamr return?

I would guess ~/go/bin is not in your path.

[clandestine-avocado]

@bemasher which rtlamr runs with no output in the terminal. I've never used Go before, and I've only been using Linux for a few months - so if I'm being dense, bear with me.

Here is where rtlamr installed:

pi@3bp:~/go/bin $ pwd
/home/pi/go/bin
pi@3bp:~/go/bin $ ls
rtlamr  rtlamr-collect

On your advice, running /home/pi/go/bin/rtlamr appears to get it working. Is there a way to make it run without specifying the full path every time? If I run just rtlamr from the /home/pi/go/bin folder, it doesn't work - which seems odd to me, but again, I'm a Linux neophyte.

[bemasher]

You'll probably want to add $GOPATH/bin to your PATH environment variable. Many OS's use the PATH environment variable to search for executables. This is a good resource to learn about setting them: https://superuser.com/questions/284342/what-are-path-and-other-environment-variables-and-how-can-i-set-or-use-them

[varnav]

I have Raspbian GNU/Linux 10 (buster)

I run this:

apt install golang
go get github.com/bemasher/rtlamr

apt runs fine, second command gives no output (I guess succeeds too)

Then I run rtl_tcp - works fine

Then I run rtlamr and get -bash: rtlamr: command not found.

which rtlamr returns nothing

Command ~/go/bin/rtlamr works.

[mattfox27]

I have Raspbian GNU/Linux 10 (buster)

I run this:

apt install golang
go get github.com/bemasher/rtlamr

apt runs fine, second command gives no output (I guess succeeds too)

Then I run rtl_tcp - works fine

Then I run rtlamr and get -bash: rtlamr: command not found.

which rtlamr returns nothing

Command ~/go/bin/rtlamr works.

I get the same -bash: rtlamr: command not found if i run ./rtlamr it works, did you ever figure this out?

[bemasher]

See https://github.com/bemasher/rtlamr/issues/141#issuecomment-786285171

[ubernerdsteve]

@mattfox27 I know this is old, but I just stumbled across this. If you didn't figure out what he means with add "$GOPATH/bin to your PATH environment variable", essentially you need to set terminal configurations to know where to look, that is the .bashrc file.

So this should fix your issue and save you the googling legwork of trial and error of something you don't quite follow; here is the cut/paste solution for you (and anyone else stuck with this) to try and figure out what this all means (though you should still read the document @bemasher linked to actually better understand what is actually happening here).

sudo nano ~/.bashrc

Go to the end of the document and insert: #GOPATH export GOPATH=$HOME/go export PATH=$PATH:$GOROOT/bin:$GOPATH/bin

Then reboot. sudo reboot

Should work after that. Depending on your linux distro some syntax might be slightly different.

In terminal if you type go env you should see GOPATH="/home/username/go"