Many of the Free Softwares (GPLed) IMHO (author’s personal opinion) struggles with marketing or reaching to mass audiences. The effort by Zeroshell to reach more audiences by the peculiar “viralware” model is appreciated.
We use Zeroshell Firewall on quite a few of our networks and are happy with it.
Viralware is a word I just coined ?!
Stumbled upon Mobile shell (Mosh) which allows persistent connection over intermittent connections, VPN – WiFi – networking roaming etc. Its quite useful especially when we have tons of nodes across multiple cloud providers & resulting attempts of their attention grabbing. Automating few things in a CRM made us end up setting up a Postfix mail server after something like more than a decade, got frustrated over the nearly non-existent internet provided by Asianet DSL & all credit of this goes to them.
TL;DR Here is a quick guide to get Mosh working on Mac & GNU/Linux flavours.
Mosh uses UDP. Yes, you heard it right.
By default it uses 60000 to 61000 for establishing connections. We would need to open up some of these ports, say a subset of this in the fire wall mechanism that we use to get access to the servers.
There is a client & a server
I missed out this part ! Well, we need to install Mosh on the client and the server. (ie apt-get install mosh or yum install mosh on the servers too BOFH.)
On Amazon / AWS / EC2 cloud,
Open up few UDP ports in the security groups. We opened up 10 ports.
On DigitalOcean or any other provider open the ports in your firewall.
Client side installation:
On Mac, we ran into issues with libprotobuf
> mosh migrate2cloud.com dyld: Library not loaded: /usr/local/lib/libprotobuf.7.dylib Referenced from: /usr/local/bin/mosh-client Reason: image not found Died at /usr/local/bin/mosh line 201.
The solution is to upgrade Brew (well why shouldn’t one use brew ?)
brew update ; brew upgrade ; brew remove libprotobuf ; brew install libprotobuf
will do the magic. If not, we can try
brew remove mosh ; brew install mosh
as well. If its doesn’t work, RTFM & the FAQ 🙂
Another issue we ran into was the locale & UTF-8 encoding. We fixed it by installing the locale in the client and server and exporting the following environment variable to the bash profile.
# for mosh
export LANG=en_US.UTF-8
export LC_ALL=en_US.UTF-8
export LC_CTYPE=en_US.UTF-8
export MM_CHARSET=utf8
export LC_COLLATE=”en_US.UTF-8″
export LC_TIME=”en_US.UTF-8″
export LC_NUMERIC=”en_US.UTF-8″
export LC_MONETARY=”en_US.UTF-8″
export LC_MESSAGES=”en_US.UTF-8″
You load the environment variables by doing the following in bash.
. ~/.bash_profile # don’t miss the dot at the beginning
Firewalls, Tunnelling, NAT
It may not work just yet as you may have to deal with NAT traversal and other nasty things. Creating an SSH tunnel can solve these issues.
mosh –ssh=”ssh -4 -R 2222:localhost:22 -i /Users/migrate2cloud/keys/ssh-key” root@server.com
Reattaching a detached Mosh:mobile-shell is not possible. But we can run screen inside mobile shell.
do pkill mosh-server instead … or pgrep mosh-server -> kill etc
PS: if you use CIRU.org, things may be different for you.
That’s it. DigitalOcean guys have come up with a nice write up here which is very helpful. There is also an Android client and iOS client in the making. On GNU/Linux I use KDE Konsole & on Mac iTerm : these are 2 good tools that are very useful IMHO.
Installing magento2 in Ubuntu 14.04 with Nginx web server.
Prerequisites:
1.PHP:
Version 5.5.X or more
Required PHP extensions:
PDO/MySQL
mbstring
mcrypt
mhash
simplexml
curl
ext-xsl
gd2, ImageMagick 6.3.7 (or later) or both
soap
intl
2.Mysql 5.6.X
3.Nginx.
Create basic nginx configuration file for magento2.
# vim /etc/nginx/sites-available/magantositename
Add the following configuration files in nginx,
##########################
server {
listen 80;
root /var/www/magento2; #Use you mangeto2 location
index index.php index.html index.htm;
server_name yuor_magento.siteurl;
#location / {
#try_files $uri $uri/ /index.php?q=$uri&$args;
#}
location /setup {
try_files $uri $uri/ @setuphandler;
}
# Rewrite Setup’s Internal Requests
location @setuphandler {
rewrite /setup /setup/index.php;
}
location / {
index index.php index.html;
try_files $uri $uri/ @handler;
}
# Rewrite Internal Requests
location @handler {
rewrite / /index.php;
}
location /pub/static {
try_files $uri $uri/ @static;
}
location @static {
rewrite ^/pub/static/(.*)$ /pub/static.php?resource=$1? last;
}
error_page 404 /404.html;
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/www;
}
#pass the PHP scripts to f stcgi socket
location ~ \.php$ {
try_files $uri =404;
fastcgi_pass unix:/var/run/php5-fpm.sock;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
include fastcgi_params;
fastcgi_read_timeout 900s;
#Magento 2 Developer Mode
fastcgi_param MAGE_MODE “developer”;
}
}
#########################
create a symlink in /etc/nginx/sites-enable/magantositename
# ln -s /etc/nginx/sites-available/magantositename /etc/nginx/sites-enable/magantositename
Restart PHP handler php5-fpm and nginx
# service php5-fpm restart
# service nginx restart
Create database and database user for magento2
login to mysql using root user and password:
# mysql -u root -p
## mysql> CREATE DATABASE <magentodbname>;
## mysql> GRANT ALL ON <magentodbname>.* FROM magentodb@localhost IDENTIFIED BY <magentodbpasswd>;
Steps to install Magento2
Change the directory where to download and install Magento2.
# cd /var/www/
Download the magento2 zip file from github
# wget https://github.com/magento/magento2/archive/develop.zip
# unzip develop.zip
# mv magento2-develop magento2
Change the ownership to your webserver user name. Typically it is www-data
# chown -R www-data:www-data magento2
# cd magento2
Change the permissions as follows,
# find . -type d -exec chmod 700 {} \;
# find . -type f -exec chmod 600 {} \;
make the file magento file executable in the directory bin
# chmod +x bin/magento
Install magento using command line,
# ./bin/magento setup:install –base-url “http://your_site_url/” –db-name “magentodbname” –db-user “magentodb” –db-password “magentodbpasswd” –admin-firstname “yourname” –admin-lastname “yourlastname” –admin-email “your_email” –admin-user “magenoadmi” –admin-password “magentoadminpasswd” –language “en_US” –currency “USD” –timezone “America/Chicago” –use-sample-data –use-rewrites=1
Here you will get your Language, Currency and Time zone using the following magento command.
Language:
# ./bim/magento info:language:list
Currency:
# ./bim/magento info:currency:list
Time Zone:
# ./bim/php magento info:timezone:list
Once the installation is completed you will get the SUCCESS message at the end of installation.
You can access the magento admin interface using the random generated URL while installing Magento2.
You can check the URL using magento command line.
# ./bin/magento info:adminuri
You will get the admin URI as,
Admin URI: /admin_8mdvzn
You can change the the Admin URI in <your Magento install dir>/app/etc/env.php.
Then you can access admin page as http://yuor_site_url/admin_8mdvzn/
You can access the magento2 home page at the installed URL as http://yuor_site_url.
It will look as below,
We have came across the following error quite a few times.
Your PHP installation appears to be missing the MySQL extension which is required by WordPress
Though it may sound tricky, the error can be quickly fixed by installing missing PHP libraries. This often happens because of the upgrades.
In PHP 7.x we can fix using the following
sudo apt-get install php-mysql
Older PHP versions can be fixed by the following
sudo apt-get install php5-mysqlnd-ms
Don’t forget to restart Apache / Nginx or the relevant web server to load the libraries / modules.
Computer Vision aka CV is widely used in robotic vision, automated processing in packaging and other industries etc. Recent developments in the automobile industry for driver-less cars have given new dimensions and emerging opportunities in the computer vision. This article gives a glimpse of opportunities and challenges.
Computter Visoin for Semantic Segmentation by migrate2cloud on Scribd
