A key element of using a Raspberry Pi for a moteino gateway is how to talk to /dev/ttyUSBX for the serial communication.
Problems
Fork/exec management from JRuby seems to be best done with spoon
JavaWorld - fork and exec on the JVM? JRuby to the Rescue!
| JavaWorld | May 13, 2009 11:01 PM |
As you should know by now, JRuby ships with FFI, a library that allows you to bind any arbitrary C function in Ruby code. So getting fork+exec to work was a simple matter of writing a little Ruby code:
require 'ffi'
module Exec
extend FFI::Library
attach_function :my_exec, :execl, [:string, :string, :varargs], :int
attach_function :fork, [], :int
end
vim1 = '/usr/bin/vim'
vim2 = 'vim'
if Exec.fork == 0
Exec.my_exec vim1, vim2, :pointer, nil
end
Process.waitall
Update: The biggest problem with using fork+exec in this way is that you can’t guarantee nothing happens between the fork call and the exec call. If, for example, the JVM decides to GC or move memory around, you can have a fatal crash at the JVM process level. Because of that, I don’t recommend using fork + exec via FFI in JRuby, even though it’s pretty cool.
However, since this post I’ve learned of the “posix_spawn” function available on most Unix variants. It’s basically fork + exec in a single function, plus most of the typical security and IO tweaks you might do after forking and before execing. It’s definitely my recommended alternative to fork+exec for JRuby, and to make that easier I’ve bundled it up as the “spoon” gem (gem install spoon) which provides spawn and spawnp to JRuby users directly. Here’s an example session using Spoon to launch JRuby as a daemon. If you just need fork+exec on the JVM, posix_spawn or the Spoon gem are the best way to do it.
require 'rubygems'
require 'spoon'
Spoon.spawnp 'jruby', *ARGV
~/projects/jruby ➔ jruby daemonize.rb -e "puts 'starting'; while true; sleep 1; puts 'still going'; end"
~/projects/jruby ➔ starting
still going
still going
still going
still going
~/projects/jruby ➔ still going
still going
still going
ps
PID TTY TIME CMD
342 ttys000 0:00.06 -bash
421 ttys000 0:00.49 /usr/bin/java -d32 -client -Djruby.memory.max=500m -Djruby.stack.max=1024k
363 ttys001 0:00.02 -bash
still going
~/projects/jruby ➔
kistill going
llstill going
still going
421still going
~/projects/jruby ➔
A fork/exec replacement for FFI-capable implementations
Spoon is an FFI binding of the posix_spawn function (and Windows equivalent), providing fork+exec functionality in a single shot.
Gem::Specification.new do |s|
s.name = "spoon"
s.version = "0.0.4"
s.authors = ["Charles Oliver Nutter"]
s.date = "2013-03-29"
s.description = s.summary = "Spoon is an FFI binding of the posix_spawn function (and Windows equivalent), providing fork+exec functionality in a single shot."
s.files = `git ls-files`.lines.map(&:chomp)
s.require_paths = ["lib"]
s.add_dependency('ffi')
s.license = "Apache-2.0"
end
/usr/bin/socat http://linux.die.net/man/3/posix_spawn http://ruby-doc.org/core-1.9.3/Signal.html
def self.posix_spawn(path, file_actions, spawn_attr, argv, env = ENV) int posix_spawn( pid_t *restrict pid, const char *restrict path, const posix_spawn_file_actions_t *file_actions, const posix_spawnattr_t *restrict attrp, char *const argv[restrict], char *const envp[restrict]);
int posix_spawnp( pid_t *restrict pid, const char *restrict file, const posix_spawn_file_actions_t *file_actions, const posix_spawnattr_t *restrict attrp, char *const argv[restrict], char * const envp[restrict]);
http://ruby-doc.org/core-1.9.3/Process.html#method-c-waitpid2
https://github.com/headius/spoon/blob/master/examples/ls.rb
require ‘spoon’
# # Do a recursive ls on the current directory, redirecting output to /tmp/ls.out #
file_actions = Spoon::FileActions.new file_actions.close(1) file_actions.open(1, “/tmp/ls.out”, File::WRONLY | File::TRUNC | File::CREAT, 0600) spawn_attr = Spoon::SpawnAttributes.new pid = Spoon.posix_spawn(‘/usr/bin/env’, file_actions, spawn_attr, %w(env ls -R))
Process.waitpid(pid)
https://github.com/ffi/ffi/issues/336 «««««««««««< wrong, should be issue on JRuby Fail on Raspberry Pi ARM linux JRuby. FFI not available
https://github.com/jruby/jruby/issues/1561 Fail on Raspberry Pi ARM linux JRuby. FFI not available
A Raspberry Pi based gateway to distributed Moteino radio connected Arduinos.
After the Debian Wheezy armel image I made a new one based on Raspbian armhf. This one is compiled with hard float support, so basically floating point operations are MUCH faster because they are done in hardware instead of software emulation :)
The most interesting on here is the raspbian-ua-netinst. There is Github repo for it:
Github repo with raspbian-ua-netinst
I had previously used the Raspbian net installer here: RaspbianInstaller
But the notes now say: Currently we reccomend using hifi’s raspbian-ua-netinst instead if you want to use an installer rather than a pre-installed image.
Dark Basic Raspbian SDHC Boot image
You will have to extract the image with p7zip:
7za x raspbian_wheezy_20130923.img.7z
Then flash it to your SD with dd:
$ sudo dd bs=1M if=raspbian_wheezy_20130923.img of=/dev/sdc
Finally, if you have an sd larger than 1GB, grow the partition with gparted (first move the swap partition at the end).
$ sudo gparted /dev/sdc
At this point install the SDHC card on the RPI, plug in the ethernet cable, plug in the USB terminal cable which will power up the RPI.
Now use screen to watch the boot up messages.
Able to use screen to connect on laptop:
$ sudo screen /dev/ttyUSB0 115200
When connected check the stty values.
$ stty -a
Attempts to use socat instead of screen
$ sudo socat - /dev/ttyUSB0,b115200
$ sudo socat - /dev/ttyUSB0,b115200,raw # no
$ sudo socat - /dev/ttyUSB0,b115200,cs7 # no
$ sudo socat - /dev/ttyUSB0,b115200,parenb,cs7 # no
$ sudo socat - /dev/ttyUSB0,b115200,parenb,cs8 # no
$ sudo socat - /dev/ttyUSB0,b115200,raw,cs7 # no
$ sudo socat - /dev/ttyusb0,b115200,raw,cs8,start=1,stop=1 # no
$ sudo socat - /dev/ttyusb0,b115200,parenb=false,raw,cs8,start=1,stop=1 # no
$ sudo socat - /dev/ttyUSB0,b115200,raw,cs8 # no
$ sudo socat - /dev/ttyUSB0,b115200,raw,cs7 # no
$ sudo socat - /dev/ttyUSB0,b115200,raw,cs8 # no
$ sudo socat - /dev/ttyUSB0,b115200,cs8,parenb=0 # close, but not exact
$ sudo socat - /dev/ttyUSB0,b115200,cs8,parenb=0,stop=0 # close
$ sudo socat - /dev/ttyUSB0,cs8,parenb=0,stop=0,ixon=1,ixoff=1 # close
$ sudo socat - /dev/ttyUSB0,cs8,parenb=0,stop=0,ixon=1,ixoff=1,echo=0
$ sudo screen /dev/ttyUSB0 115200
$ sudo socat /dev/ttyUSB0,raw,echo=0,crlf
$ socat -d -d -d -d -x TCP:localhost:7758 FILE:/dev/ttyUSB0,b9600,raw
Found the IP address on the router: 192.168.88.223
ssh into the RPI and have a go. The root password is raspberry.
$ ssh root@192.168.88.223
Change the root password
passwd
You will have to reconfigure your timezone after the first boot:
# dpkg-reconfigure tzdata
The keyboard layout:
# dpkg-reconfigure console-data
And the localization:
# dpkg-reconfigure locales
Edit /etc/hostname to have the hostname.
$ cat /etc/hostname
pika
Edit /etc/hosts and a line with the new hostname.
$ cat /etc/hosts
127.0.0.1 localhost
127.0.0.1 pika <<< added this line with hostname
...
# adduser craig
Note that from now on:
# prompt means run as root.
$ prompt means run as user craig
# su - craig
Generate a key pair for the new user
$ ssh-keygen
Check the Debian version
$ cat /etc/debian_version
7.2
Update the system
# apt-get update
# apt-get dist-upgrade
Install python, vim, tmux, git
# apt-get install python
# apt-get install vim tmux git
Personalize git
# git config --global user.name "Your Name Here"
Sets the default name for git to use when you commit
# git config --global user.email "your_email@example.com"
Sets the default email for git to use when you commit
Set up the vim dotfiles and vundle.
$ git clone git@github.com:CootCraig/dotfiles_again.git
$ cd dotfiles_again/linux
$ bash ./install.sh
cd ~/dotfiles_again/windows/vimfiles/bundle
git clone https://github.com/gmarik/vundle.git
There are some notes on using vundle in the file ~/.vim/bundle/Readme.txt The Raspbian vim does not have python support, so disable UltiSnips vim script. Comment out the following line in ~/.vimrc
Bundle 'vim-scripts/UltiSnips'
to
"Bundle 'vim-scripts/UltiSnips'
And then run BundleInstall.
in vim. :BundleInstall
These instructions worked fine.
How to set up ssh so you aren’t asked for a password
Add the contents of the public key file into ~/.ssh/authorized_keys on the remote site (the file should be mode 600).
# apt-get install sudo
# adduser craig sudo
On the Ubuntu host.
$ sudo dd bs=1M if=/dev/sdc of=pika_20140220_1441.img
7519+0 records in
7519+0 records out
7884242944 bytes (7.9 GB) copied, 446.404 s, 17.7 MB/s
$ 7za a -t7z pika_20140220_1441.img.7z pika_20140220_1441.img
$ ls -l pika_2014*
-rw-r--r-- 1 craig craig 7884242944 Feb 20 14:49 pika_20140220_1441.img
-rw-r--r-- 1 craig craig 254215741 Feb 20 15:09 pika_20140220_1441.img.7z
# apt-get install build-essential checkinstall libtool automake uuid-dev
The following extra packages will be installed:
autoconf autotools-dev binutils bzip2 cpp cpp-4.6 dpkg-dev fakeroot g++ g++-4.6 gcc gcc-4.6 libalgorithm-diff-perl libalgorithm-diff-xs-perl libalgorithm-merge-perl libdpkg-perl libfile-fcntllock-perl libgmp10 libgomp1 libltdl-dev
libltdl7 libmpc2 libmpfr4 libstdc++6-4.6-dev libtimedate-perl m4 make
Suggested packages:
autoconf2.13 autoconf-archive gnu-standards autoconf-doc gettext binutils-doc bzip2-doc cpp-doc gcc-4.6-locales debian-keyring gcc-4.6-doc libstdc++6-4.6-dbg gcc-multilib manpages-dev automake1.9 flex bison gdb gcc-doc
libmudflap0-4.6-dev libgcc1-dbg libgomp1-dbg libquadmath-dbg libmudflap0-dbg binutils-gold libtool-doc libstdc++6-4.6-doc automaken gfortran fortran95-compiler gcj make-doc
The following NEW packages will be installed:
autoconf automake autotools-dev binutils build-essential bzip2 checkinstall cpp cpp-4.6 dpkg-dev fakeroot g++ g++-4.6 gcc gcc-4.6 libalgorithm-diff-perl libalgorithm-diff-xs-perl libalgorithm-merge-perl libdpkg-perl
libfile-fcntllock-perl libgmp10 libgomp1 libltdl-dev libltdl7 libmpc2 libmpfr4 libstdc++6-4.6-dev libtimedate-perl libtool m4 make uuid-dev
0 upgraded, 32 newly installed, 0 to remove and 0 not upgraded.
Need to get 26.8 MB of archives.
After this operation, 69.2 MB of additional disk space will be used.
Source for stable release 3.2.4
This is supported by ffi-rzmq, the JRuby librar I plan to use. I unpacked for build at:
# cd /opt/zeromq/zeromq-3.2.4
The installation will be to /usr/local/
# ./configure --help
Installation directories:
--prefix=PREFIX install architecture-independent files in PREFIX
[/usr/local]
--exec-prefix=EPREFIX install architecture-dependent files in EPREFIX
[PREFIX]
Build and install.
# ./configure
# make
# checkinstall
A debian package was left here:
/opt/zeromq/zeromq-3.2.4/zeromq_3.2.4-1_armhf.deb
From /etc/inittab
...
# Example how to put a getty on a serial line (for a terminal)
#
#T0:23:respawn:/sbin/getty -L ttyS0 9600 vt100
#T1:23:respawn:/sbin/getty -L ttyS1 9600 vt100
...
However, this is the device file we see:
$ ls -l /dev/ttyAMA0
crw-rw---T 1 root dialout 204, 64 Dec 31 1969 /dev/ttyAMA0
So let’s add this line to /etc/inittab
...
# Example how to put a getty on a serial line (for a terminal)
#
#T0:23:respawn:/sbin/getty -L ttyS0 9600 vt100
T0:23:respawn:/sbin/getty -L ttyAMA0 115200 vt100
#T1:23:respawn:/sbin/getty -L ttyS1 9600 vt100
...
I have failed to get Wifi working and would like some help. I’m not sure how how to troubleshoot from here. Here are some details on my setup.
Using this OS image. I want a minimal install with no X.
Dark Basic Raspbian SDHC Boot image
With this USB wifi plug: Edimax EW-7811UN
Boot time messages include these related to the Edimax plug.
[ 3.232011] usb 1-1.2: new high-speed USB device number 4 using dwc_otg
[ 3.364155] usb 1-1.2: New USB device found, idVendor=7392, idProduct=7811
[ 3.380505] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 3.399033] usb 1-1.2: Product: 802.11n WLAN Adapter
[ 3.411807] usb 1-1.2: Manufacturer: Realtek
[ 3.417625] usb 1-1.2: SerialNumber: 00e04c000001
...
[ 15.826605] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
System reports as.
root@pika:~# uname -a
Linux pika 3.6.11+ #545 PREEMPT Fri Sep 20 23:57:55 BST 2013 armv6l GNU/Linux
More evidence the Edimax Wifi is seen
root@pika:~# lsusb
Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
Bus 001 Device 004: ID 7392:7811 Edimax Technology Co., Ltd EW-7811Un 802.11n Wireless Adapter [Realtek RTL8188CUS]
The wifi driver module is loaded
root@pika:~# lsmod
Module Size Used by
...
8192cu 490361 0
...
Output of iwconfig
root@pika:~# iwconfig
wlan0 unassociated Nickname:"<WIFI@REALTEK>"
Mode:Auto Frequency=2.412 GHz Access Point: Not-Associated
Sensitivity:0/0
Retry:off RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality:0 Signal level:0 Noise level:0
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
The MicroTik Router is seen.
root@pika:~# iwlist wlan0 scan
wlan0 Scan completed :
Cell 01 - Address: D4:CA:6D:56:86:59
ESSID:"Pirates"
Protocol:IEEE 802.11bgn
Mode:Master
Frequency:2.412 GHz (Channel 1)
Encryption key:on
Bit Rates:300 Mb/s
Extra:wpa_ie=dd160050f20101000050f20401000050f20401000050f202
IE: WPA Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
Extra:rsn_ie=30120100000fac040100000fac040100000fac02
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
Quality=100/100 Signal level=100/100
Contents of /etc/network/interfaces.
root@pika:/etc/network# cat /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
allow-hotplug eth0
iface eth0 inet dhcp
allow-hotplug wlan0
iface wlan0 inet dhcp
wpa-ssid Pirates
wpa-psk thepassword
But I have not been able to enable the Wifi.
root@pika:~# ifup wlan0
Internet Systems Consortium DHCP Client 4.2.2
Copyright 2004-2011 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
[ 1389.028246] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Listening on LPF/wlan0/80:1f:02:a2:df:94
Sending on LPF/wlan0/80:1f:02:a2:df:94
Sending on Socket/fallback
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 5
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 8
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 11
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 15
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 18
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 4
No DHCPOFFERS received.
No working leases in persistent database - sleeping.
Note, the MicroTik router Wifi is in use by all the laptops we have tried.
xzcat /path/to/raspbian-ua-netinst-latest.img.xz > glop.img
sudo dd bs=1M if= glop.img of=/dev/sdc
rm glop.img
Boot with the SDHC and view the HDMI video to see install progress.
The system is almost completely unconfigured on first boot. Here are some tasks you most definitely want to do on first boot.
The default root password is raspbian.
Set new root password:
passwd
Configure your default locale:
dpkg-reconfigure locales
Configure your timezone:
dpkg-reconfigure tzdata
Install latest kernel and firmware package:
apt-get update
apt-get install linux-image-rpi-rpfv raspberrypi-bootloader-nokernel
...
update-initramfs: Generating /boot/initrd.img-3.10-3-rpi
Replace old kernel.img with latest kernel:
cp /vmlinuz /boot/kernel.img
Reboot to new kernel and firmware:
reboot
Edit /etc/hostname and /etc/hosts to have the hostname.
root@pi:/etc# cat hostname
pika
root@pi:/etc# cat hosts
127.0.0.1 localhost pika
Edit /etc/inittab and add a line to enable the serial console.
#T0:23:respawn:/sbin/getty -L ttyS0 9600 vt100
T0:23:respawn:/sbin/getty -L ttyAMA0 115200 vt100
#T1:23:respawn:/sbin/getty -L ttyS1 9600 vt100
$ sudo screen /dev/ttyUSB0 115200
root@pika:~# uname -a
Linux pika 3.10-3-rpi #1 Debian 3.10.11-1+rpi4 (2014-01-24) armv6l GNU/Linux
ssh is working. This is the IP address assigned to eth0
ssh root@192.168.88.223
Check the size of file systems. Looks like the whole 8GB SDHC is used.
root@pika:~# df -k
Filesystem 1K-blocks Used Available Use% Mounted on
rootfs 7399324 302888 6697524 5% /
/dev/root 7399324 302888 6697524 5% /
devtmpfs 224292 0 224292 0% /dev
tmpfs 44876 116 44760 1% /run
tmpfs 5120 0 5120 0% /run/lock
tmpfs 89740 0 89740 0% /run/shm
/dev/mmcblk0p1 48742 22956 25786 48% /boot
tmpfs 89740 0 89740 0% /tmp
$ sudo dd bs=1M if=/dev/sdc of=pika_20140305_0958.img
$ 7za a -t7z pika_20140305_0958.img.7z pika_20140305_0958.img
I had problems, but got help here.
Post on raspberrypi.org forum - Where to get help on wifi?
So I added 2 packages.
apt-get install wpasupplicant
apt-get install wireless-tools
Here is the trail Verify the Edimax EW-7811Un is seen.
root@pika:~# lsusb
...
Bus 001 Device 004: ID 7392:7811 Edimax Technology Co., Ltd EW-7811Un 802.11n Wireless Adapter [Realtek RTL8188CUS]
...
Note that the wpa-psk entry is not the passphrase. With the ssid and passphrase this site can give the psk.
Wireshark - WPA PSK (Raw Key) Generator
Here is the interfaces file.
root@pika:~# cat /etc/network/interfaces
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcp
auto wlan0
allow-hotplug wlan0
iface wlan0 inet dhcp
wpa-ssid Pirates
wpa-psk alonghexstringpsk
See if iwlist from wireless-tools finds the router.
root@pika:~# iwlist wlan0 scan
wlan0 Scan completed :
Cell 01 - Address: D4:CA:6D:56:86:59
ESSID:"Pirates"
Protocol:IEEE 802.11bgn
Mode:Master
Frequency:2.412 GHz (Channel 1)
Encryption key:on
Bit Rates:300 Mb/s
Extra:wpa_ie=dd1a0050f20101000050f20402000050f2040050f20201000050f202
IE: WPA Version 1
Group Cipher : CCMP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
Extra:rsn_ie=30160100000fac040200000fac04000fac020100000fac02
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
Quality=100/100 Signal level=100/100
For the wifi interface
$ ssh craig@192.168.88.218
For the wired interface
$ ssh root@192.168.88.223
pika# adduser craig
$ ssh-keygen
pika# apt-get install python
...
The following NEW packages will be installed:
file libmagic1 libsqlite3-0 mime-support python python-minimal python2.7 python2.7-minimal
...
pika# apt-get install vim tmux git
...
The following NEW packages will be installed:
git git-man libclass-isa-perl libcurl3-gnutls liberror-perl libevent-2.0-5 libgpm2 libldap-2.4-2 libpopt0 librtmp0 libsasl2-2 libsasl2-modules libssh2-1 libswitch-perl patch perl perl-modules rsync tmux vim vim-runtime
...
$ git config --global user.name "Your Name Here"
Sets the default name for git to use when you commit
$ git config --global user.email "your_email@example.com"
Sets the default email for git to use when you commit
$ git clone git@github.com:CootCraig/dotfiles_again.git
$ cd dotfiles_again/linux
$ bash ./install.sh
cd ~/dotfiles_again/windows/vimfiles/bundle
git clone https://github.com/gmarik/vundle.git
There are some notes on using vundle in the file ~/.vim/bundle/Readme.txt The Raspbian vim does not have python support, so disable UltiSnips vim script. Comment out the following line in ~/.vimrc
Bundle 'vim-scripts/UltiSnips'
to
"Bundle 'vim-scripts/UltiSnips'
And then run BundleInstall.
in vim. :BundleInstall
These instructions worked fine.
How to set up ssh so you aren’t asked for a password
Add the contents of the public key file into ~/.ssh/authorized_keys on the remote site (the file should be mode 600).
pika# apt-get install sudo
pika# adduser craig sudo
pika# apt-get install build-essential checkinstall libtool automake uuid-dev
...
The following NEW packages will be installed:
autoconf automake autotools-dev binutils build-essential bzip2 checkinstall cpp cpp-4.6 dpkg-dev fakeroot g++ g++-4.6 gcc gcc-4.6 gcc-4.6-base libalgorithm-diff-perl libalgorithm-diff-xs-perl libalgorithm-merge-perl libc-dev-bin
libc6-dev libdpkg-perl libfile-fcntllock-perl libgmp10 libgomp1 libltdl-dev libltdl7 libmpc2 libmpfr4 libstdc++6-4.6-dev libtimedate-perl libtool linux-libc-dev m4 make manpages manpages-dev uuid-dev xz-utils
...
Source for stable release 3.2.4
This is supported by ffi-rzmq, the JRuby library I plan to use. I unpacked for build at:
pika# cd /opt/zeromq/zeromq-3.2.4
The installation will be to /usr/local/
pika# ./configure --help
Installation directories:
--prefix=PREFIX install architecture-independent files in PREFIX
[/usr/local]
--exec-prefix=EPREFIX install architecture-dependent files in EPREFIX
[PREFIX]
pika# ./configure
pika# make
pika# checkinstall
A debian package was left here:
/opt/zeromq/zeromq-3.2.4/zeromq_3.2.4-1_armhf.deb
pika# apt-get install socat
pika# apt-get install python-pip
...
The following NEW packages will be installed:
python-pip python-pkg-resources python-setuptools python2.6 python2.6-minimal
...
pika# pip install supervisor
...
Downloading supervisor-3.0.tar.gz (459Kb): 459Kb downloaded
...
Installing echo_supervisord_conf script to /usr/local/bin
Installing pidproxy script to /usr/local/bin
Installing supervisorctl script to /usr/local/bin
Installing supervisord script to /usr/local/bin
...
install python-pip mentioned apt-utils not installed, so let’s install it.
pika# apt-get install apt-utils
...
The following NEW packages will be installed:
apt-utils libapt-inst1.5
...
for copy and paste
extracted jdk-8-fcs-b129-linux-arm-vfp-hflt-06_feb_2014.tar.gz to /opt/java/jdk1.8.0
Made a symbolic link for /opt/java/jdk
$ ls -l /opt/java/jdk
lrwxrwxrwx 1 root root 9 Mar 5 22:06 /opt/java/jdk -> jdk1.8.0/
Modify /etc/login.defs
ENV_SUPATH PATH=/opt/java/jdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
ENV_PATH PATH=/opt/java/jdk/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games
Modify /etc/profile
if [ "`id -u`" -eq 0 ]; then
PATH="/opt/java/jdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
else
PATH="/opt/java/jdk/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games"
fi
modify /etc/sudoers
Defaults secure_path="/opt/java/jdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
/etc/environment was empty
Verify that java runs and the version.
$ java -version
java version "1.8.0"
Java(TM) SE Runtime Environment (build 1.8.0-b129)
Java HotSpot(TM) Client VM (build 25.0-b69, mixed mode)
Unpack the latest jruby tarball to /opt/jruby/jruby-1.7.11
Make a symbolic to this version of jruby.
$ ls -l /opt/jruby/jruby
lrwxrwxrwx 1 root root 13 Mar 5 23:06 /opt/jruby/jruby -> jruby-1.7.11/
Modify /etc/login.defs
ENV_SUPATH PATH=/opt/java/jdk/bin:/opt/jruby/jruby/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
ENV_PATH PATH=/opt/java/jdk/bin:/opt/jruby/jruby/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games
Modify /etc/profile
if [ "`id -u`" -eq 0 ]; then
PATH="/opt/java/jdk/bin:/opt/jruby/jruby/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
else
PATH="/opt/java/jdk/bin:/opt/jruby/jruby/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games"
fi
modify /etc/sudoers
Defaults secure_path="/opt/java/jdk/bin:/opt/jruby/jruby/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
Add to /etc/environment
JAVA_HOME=/opt/java/jdk
Verify that jruby runs.
$ jruby -v
jruby 1.7.11 (1.9.3p392) 2014-02-24 86339bb on Java HotSpot(TM) Client VM 1.8.0-b129 +indy [linux-arm]
pika# adduser craig staff
pika# cd /opt/jruby/jruby/lib/ruby/gems
pika# sudo bash -c "find shared -type d |xargs chmod 775"
pika# sudo bash -c "find shared |xargs chmod g+w"
pika# cd /opt/jruby/jruby-1.7.11
pika# sudo bash -c "find bin |xargs chmod g+w"
$ gem install bundler
Fetching: bundler-1.5.3.gem (100%)
/opt/jruby/jruby-1.7.11/lib/ruby/shared/rubygems/installer.rb:507 warning: executable? does not in this environment and will return a dummy value
Successfully installed bundler-1.5.3
1 gem installed