Can and how do I get cgminer 3.4.3 on raspberry pi?

[J35st3r]

However the last part ">/dev/null 2>&1&" I'm not sure what it does

The final '&' is required. It runs the command in background (disconnected from the terminal).

">/dev/null 2>&1" redirects any output to the null device (just discards it), else "nohup" would write it to nohup.out

There are always two output streams under unix, standard output and error, ">/dev/null" redirects the standard output while "2>&1" tells it to put the error stream (2) in the same place as the standard output stream (1).

Finally the "nohup" just traps the "hangup" signal, so the program running in background does not quit when you log off (hangup being terminology from the old days of dialup terminal sessions).

Unix is fun 

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[salfter]

below is the instructions for 3.1.1 but since 3.4.3 is missing what I think I need, its probably no help at all either.

http://learn.adafruit.com/piminer-raspberry-pi-bitcoin-miner/install-cgminer

That's a good start...here's what I ended up doing to build cgminer 3.7.2 from GitHub source. (I had trouble retrieving source archives from ck.kolivas.org a while back, so I started pulling from GitHub instead.) A Raspberry Pi came with my Bitfury mining equipment yesterday. I'd like to have it manage my BFL Jalapeños as well so I can get rid of the power-hungry Pentium 4 that's currently running them.

Code:

# install dependencies

apt-get install autoconf automake libtool libusb-1.0-0-dev libusb-1.0-0 libcurl4-openssl-dev libncurses5-dev libudev-dev

# option 1: clone the repo

git clone https://github.com/ckolivas/cgminer
git checkout 829f068 # 3.7.2 release
cd cgminer

# option 2: grab a snapshot

wget https://github.com/ckolivas/cgminer/archive/v3.7.2.tar.gz -O cgminer-3.7.2.tar.gz
tar tzf cgminer-3.7.2.tar.gz
cd cgminer-3.7.2

# build and install

./autogen.sh
./configure --enable-bflsc
make
make install

Replace --enable-bflsc with whatever's appropriate for the mining equipment you have.  As near as I can tell, the Bitfury support included in recent versions doesn't yet extend to the rigs sold by megabigpower and bitfurystrikesback.