Very much like Python, including its syntax, Swift programming language actually has a shell. Isn't that cool?
From your terminal, type:
# xcrun swift
You will then see
Welcome to Swift! Type :help for assistance.
1>
Enjoy!
Wednesday, December 17, 2014
Thursday, September 18, 2014
Install MongooseIM on Ubuntu
Ever wondered what awesome technology is used behind WhatsApp which was sold at $10B? It's MongooseIM. And here's how to get you started using it, in Ubuntu..
Install the Pre-Built Package:
Configure it
Run it
Install the Pre-Built Package:
wget http://packages.erlang-solutions.com/site/esl/mongooseim/FLAVOUR_1_main/mongooseim_1.4.0-1~ubuntu~trusty_amd64.deb dpkg -i mongooseim_1.4.0-1~ubuntu~trusty_amd64.deb
Configure it
cd /usr/lib/mongooseim/etc vim ejabberd.cfg
Run it
mongooseimctl live
Monday, June 30, 2014
Linux: Deleted a File and Its NOT Freeing Up Space?
There is only one reason for it - the file is held by a process.
To fix the issue:
1) Find which process is holding it.
Check open files and return the process using an unlinked file (deleted file)
# lsof +L1
2) Kill the process
# kill -9 <pid>
For a graceful kill but can/may take a while.
# kill -15 <pid>
Friday, May 30, 2014
PayPal: You must specify valid values for the A3, P3, and T3 parameters
When you the error "You must specify valid values for the A3, P3, and T3 parameters" it means that the values you sent to PayPal are invalid.
It could mean that,
1) A3 is not a number
2) P3 is beyond the acceptable limits
3) T3 is not valid.
Usually, the problem is a combination of P3 and T3 issue.
In my case, it was sending more than 24 mos for P3. The solution is to convert T3=M to T3=Y and change the P3 to rounded up years, so P3=3. This solve the issue. I wasn't able to find any documentation associated with the acceptable ranges and user inputs to these 3 required parameters for integration recurring payment button.
Sunday, May 18, 2014
Install Jenkins on Ubuntu/Debian
If you wish to install Jenkins (fork of Hudson, maintained by original developers), do the following:
sudo -i
wget -q -O - http://pkg.jenkins-ci.org/debian/jenkins-ci.org.key | sudo apt-key add -
sh -c 'echo deb http://pkg.jenkins-ci.org/debian binary/ > /etc/apt/sources.list.d/jenkins.list'apt-get updateapt-get install jenkinsNote: make sure JAVA is installed.
Install ElasticSearch 1.0.x on Ubuntu/Debian
ES released an apt-get repo for ElasticSearch. It is the recommended package-driven deployment.
sudo -i apt-get install openjdk-7-jre-headless -y wget -O - http://packages.elasticsearch.org/GPG-KEY-elasticsearch | apt-key add - vim /etc/apt/sources.list #Append the following, then save deb http://packages.elasticsearch.org/elasticsearch/1.0/debian stable main apt-get update apt-get install elasticsearch service elasticsearch start
Thursday, May 15, 2014
Yum Install ElasticSearch 1.x
Note: Works for CentOS/RHEL/Fedora.
yum install java-1.7.0-openjdk.i686 -y
yum install elasticsearch
If you are wondering where the data directory is for this installations steps, it is stored at:
/var/lib/elasticsearch/elasticsearch
rpm --import http://packages.elasticsearch.org/GPG-KEY-elasticsearchvim /etc/yum.repos.d/elasticsearch.repo
[elasticsearch-1.0] name=Elasticsearch repository for 1.0.x packages baseurl=http://packages.elasticsearch.org/elasticsearch/1.0/centos gpgcheck=1 gpgkey=http://packages.elasticsearch.org/GPG-KEY-elasticsearch enabled=1yum update
yum install java-1.7.0-openjdk.i686 -y
yum install elasticsearch
Start ElasticSearch
/etc/init.d/elasticsearch startIf you are wondering where the data directory is for this installations steps, it is stored at:
/var/lib/elasticsearch/elasticsearch
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