Fabric Python library to run SSH to multiple computers

Fabric Python library can be used to send SSH commands to multiple computers at the same time.

This comes useful when doing distributed updates to the SBC (i.e. Raspberry Pi) cluster.

http://www.fabfile.org/

Fabric Python library to run SSH to multiple computers

Fabric Python library can be used to send SSH commands to multiple computers at the same time.

This comes useful when doing distributed updates to the SBC (i.e. Raspberry Pi) cluster.

http://www.fabfile.org/

GitHub SSH

Go to:

https://github.com/settings/keys

Read:

https://gist.github.com/developius/c81f021eb5c5916013dc


$ ssh -T git@github.com


The authenticity of host 'github.com (192.30.253.112)' can't be established.

RSA key fingerprint is SHA256:nTh....

Are you sure you want to continue connecting (yes/no)? yes

Warning: Permanently added 'github.com,1xx.xx.xx.xx' (RSA) to the list of known hosts.

Enter passphrase for key '/Users/uki/.ssh/id_rsa':

Hi UkiDLucas! You've successfully authenticated, but GitHub does not provide shell access.

GitHub SSH

Go to:

https://github.com/settings/keys

Read:

https://gist.github.com/developius/c81f021eb5c5916013dc


$ ssh -T git@github.com


The authenticity of host 'github.com (192.30.253.112)' can't be established.

RSA key fingerprint is SHA256:nTh....

Are you sure you want to continue connecting (yes/no)? yes

Warning: Permanently added 'github.com,1xx.xx.xx.xx' (RSA) to the list of known hosts.

Enter passphrase for key '/Users/uki/.ssh/id_rsa':

Hi UkiDLucas! You've successfully authenticated, but GitHub does not provide shell access.

SHH key

$ git clone git@github.com:roboguice/roboguice.git
Cloning into 'roboguice'...

Permission denied (publickey).

$ ls -al ~/.ssh

total 120

-rw-------   1 uki  staff   1675 Oct 31  2012 id_rsa

COPY YOUR PUBLIC KEY to clipboard

$ pbcopy < ~/.ssh/id_rsa.pub 

PASTE your SSH key exactly as copied (i.e. in GitHub settings)
https://github.com/settings/ssh

$ git clone git@github.com:roboguice/roboguice.git roboguice

Cloning into 'roboguice'...

remote: Counting objects: 18463, done.

Receiving objects:  15%

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SHH key

$ git clone git@github.com:roboguice/roboguice.git
Cloning into 'roboguice'...

Permission denied (publickey).

$ ls -al ~/.ssh

total 120

-rw-------   1 uki  staff   1675 Oct 31  2012 id_rsa

COPY YOUR PUBLIC KEY to clipboard

$ pbcopy < ~/.ssh/id_rsa.pub 

PASTE your SSH key exactly as copied (i.e. in GitHub settings)
https://github.com/settings/ssh

$ git clone git@github.com:roboguice/roboguice.git roboguice

Cloning into 'roboguice'...

remote: Counting objects: 18463, done.

Receiving objects:  15%

If you like this post, please give me your 2 cents ($0.02 litterally) to show token of appreciation and encourage me to write more:

Donate Bitcoins

Raspberry Pi: Java 1.8

Check existing version

pi@raspberrypi ~ $ java -version
java version "1.7.0_40"

DOWNLOAD:
Linux ARM v6/v7 Hard Float ABI 76.67 MB
http://www.oracle.com/technetwork/java/javase/downloads/jdk8-arm-downloads-2187472.html

COPY OVER TO PI

$ scp ~/Downloads/jdk-8u33-linux-arm-vfp-hflt.gz pi@192.168.1.xxx:

LOG IN TO PI

$ ssh pi@192.168.1.xxx

CHECK THE TRANSFER

pi@raspberrypi ~ $ ls -alt
total 178460
-rw-r----- 1 pi pi 80392759 Feb 6 06:44 jdk-8u33-linux-arm-vfp-hflt.gz

UNPACKAGE

pi@raspberrypi ~ $ sudo tar zxvf jdk-8u33-linux-arm-vfp-hflt.gz -C /opt
jdk1.8.0_33/COPYRIGHT
jdk1.8.0_33/LICENSE
jdk1.8.0_33/README.html
jdk1.8.0_33/THIRDPARTYLICENSEREADME.txt


jdk1.8.0_33/bin/
....

CHECK VERSION

pi@raspberrypi ~ $ /opt/jdk1.8.0_33/bin/java -version
java version "1.8.0_33"
Java(TM) SE Runtime Environment (build 1.8.0_33-b05)
Java HotSpot(TM) Client VM (build 25.33-b05, mixed mode)

Raspberry Pi: Java 1.8

Check existing version

pi@raspberrypi ~ $ java -version
java version "1.7.0_40"

DOWNLOAD:
Linux ARM v6/v7 Hard Float ABI 76.67 MB
http://www.oracle.com/technetwork/java/javase/downloads/jdk8-arm-downloads-2187472.html

COPY OVER TO PI

$ scp ~/Downloads/jdk-8u33-linux-arm-vfp-hflt.gz pi@192.168.1.xxx:

LOG IN TO PI

$ ssh pi@192.168.1.xxx

CHECK THE TRANSFER

pi@raspberrypi ~ $ ls -alt
total 178460
-rw-r----- 1 pi pi 80392759 Feb 6 06:44 jdk-8u33-linux-arm-vfp-hflt.gz

UNPACKAGE

pi@raspberrypi ~ $ sudo tar zxvf jdk-8u33-linux-arm-vfp-hflt.gz -C /opt
jdk1.8.0_33/COPYRIGHT
jdk1.8.0_33/LICENSE
jdk1.8.0_33/README.html
jdk1.8.0_33/THIRDPARTYLICENSEREADME.txt


jdk1.8.0_33/bin/
....

CHECK VERSION

pi@raspberrypi ~ $ /opt/jdk1.8.0_33/bin/java -version
java version "1.8.0_33"
Java(TM) SE Runtime Environment (build 1.8.0_33-b05)
Java HotSpot(TM) Client VM (build 25.33-b05, mixed mode)

WARNING: UNPROTECTED PRIVATE KEY FILE!

If you are getting this kind of error the the permissions on your files are modified incorrectly:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@         WARNING: UNPROTECTED PRIVATE KEY FILE!          @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permissions 0744 for '/home/your_name/.ssh/id_rsa' are too open.
It is recommended that your private key files are NOT accessible by others.
This private key will be ignored.
bad permissions: ignore key: /home/your_name/.ssh/id_rsa

@ .ssh $ ls -alt

..

-rw-r--r--@  1 your_name  staff   222 Nov 26  2012 id_rsa.pub

-rw-r--r--   1 your_name  staff   887 Nov 20  2012 id_rsa

...

@ .ssh $ 

To fix this problem change permissions:

@ .ssh $ chmod 600 id_rsa

@ .ssh $ chmod 600 id_rsa.pub

@ .ssh $ ls -alt

total 80

...

-rw-------@  1 uki  staff   222 Nov 26  2012 id_rsa.pub

-rw-------   1 uki  staff   887 Nov 20  2012 id_rsa_cnh

...

@ .ssh $ 

WARNING: UNPROTECTED PRIVATE KEY FILE!

If you are getting this kind of error the the permissions on your files are modified incorrectly:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@         WARNING: UNPROTECTED PRIVATE KEY FILE!          @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permissions 0744 for '/home/your_name/.ssh/id_rsa' are too open.
It is recommended that your private key files are NOT accessible by others.
This private key will be ignored.
bad permissions: ignore key: /home/your_name/.ssh/id_rsa

@ .ssh $ ls -alt

..

-rw-r--r--@  1 your_name  staff   222 Nov 26  2012 id_rsa.pub

-rw-r--r--   1 your_name  staff   887 Nov 20  2012 id_rsa

...

@ .ssh $ 

To fix this problem change permissions:

@ .ssh $ chmod 600 id_rsa

@ .ssh $ chmod 600 id_rsa.pub

@ .ssh $ ls -alt

total 80

...

-rw-------@  1 uki  staff   222 Nov 26  2012 id_rsa.pub

-rw-------   1 uki  staff   887 Nov 20  2012 id_rsa_cnh

...

@ .ssh $ 

How To SSH File-Share On Your Iphone/ iPod Touch (mac)

Check out this video on YouTube:

http://www.youtube.com/watch?v=-TUByq9HTbs