After A Fresh Arch Linux Install - abrantsma/Pneumo GitHub Wiki

$ passwd		# create password for root
bme462			# enter password	
bme462			# enter password
$ nano /etc/motd	# edit login message to display rpi<##>/ rpi<00>
$ pacman -Syyuu		# update system
$ useradd -m -g users -s /bin/bash rpi00 # add user, has to be the same username for all pis in order to do parallel computing
$ pacman -S sudo	# install sudo
$ nano /etc/sudoers	# give user sudo rights
add 'rpi00 ALL=(ALL) ALL' under 'root ALL=(ALL) ALL'
$ passwd rpi00	# add password for new user
rpi00bme462		# enter password
rpi00bme462		# enter password
$ exit

$ sudo gpasswd -a rpi00 audio	# give permission to various functions ...
$ sudo gpasswd -a rpi00 video
$ sudo gpasswd -a rpi00 power
$ sudo gpasswd -a rpi00 wheel

$ sudo nano /etc/hostname	# change hostname from 'alarmpi' to 'alarmpi<00>'
$ sudo pacman -S octave nfs-utils base-devel openmpi vim gdb bc minicom
accept default install prefs.
$ mkdir builds
$ cd builds
$ curl -L -O http://www.mpich.org/static/downloads/1.5/mpich2-1.5.tar.gz # Acquire mpich2 build files
$ gunzip -c mpich2-1.5.tar.gz | tar xvf -	# Build and install the package.
$ cd mpich2-1.5
$ sudo pacman -S gcc-fortran	# will need in order to make mpich2..
$ sudo ./configure # run the configuration script... UNCLEAR IF NEED TO DO: "sudo ./configure" vs "./configure"
$ sudo make	# like 30 minutes
$ sudo make install	# like 2 minutes.
$ nano ~/.rhosts
Master pi00
Slave01 pi01
Slave02 pi02
$ sudo nano /etc/hosts
add:
192.168.1.108	Master
192.168.1.114	Slave01
192.168.1.111	Slave02
$ sudo nano /etc/hosts.allow
ALL+
$ sudo nano /etc/securetty
add:
rsh
rlogin
rexec
pts/0
pts/1

$ ssh-keygen -t rsa
$ ssh-keygen -t dsa
#Doesnt work...#$ ssh-keygen -t edsa
$ cat .ssh/id_rsa.pub | ssh rpi00@<IP> 'cat >> .ssh/authorized_keys' # Pair for password-less ssh
# current problem seems to be the fact that usernames are different...
# YES! ^ changed the username to be the same and it works.
$ octave
octave:1> pkg install -forge parallel -auto	# this takes forever with no output. just wait it out.
##Test parallel:##
octave:2> pkg load parallel
octave:3> fun = @(x) x^2;
octave:4> vector_x = 1:10;
octave:5> vector_y = pararrayfun(nproc, fun, vector_x) #Output should be:
parcellfun: 10/10 jobs done
vector_y =

 1     4     9    16    25    36    49    64    81   100
###################

$ sudo pacman -S git	# install git so we can quickly pull code.