These are the 4 libraries apart from standard library nltk are useful to analyze natural languages using python.

1) from corenlp import StanfordCoreNLP

https://github.com/stanfordnlp/CoreNLP

2) from gensim.models import word2vec

https://github.com/piskvorky/gensim/

3) import divisi2

https://github.com/commonsense/divisi2

4) from sklearn.naive_bayes import MultinomialNB

https://github.com/scikit-learn/scikit-learn

The cost of Aurora hosting per hour.

db.r3.large $0.290 (0.24 mysql)
db.r3.xlarge $0.580 (0.475 mysql)
db.r3.2xlarge $1.160 (0.945 mysql)
db.r3.4xlarge $2.320 (1.89 mysql)
db.r3.8xlarge $4.640 (3.78 mysql)

Mysql hosting starts with db.t2.micro at only $0.017 per hour.

It is possible to use password to connect to AWS

1) change config file
sudo vi /etc/ssh/sshd_config

PermitRootLogin yes
PasswordAuthentication yes

2) restart
sudo service ssh restart

3) add a password
sudo passwd root

4) ssh without key
ssh root@xxx.com

Steps to install innobackupex on Ubuntu:

$ apt-key adv --keyserver keys.gnupg.net --recv-keys 1C4CBDCDCD2EFD2A

Add this to /etc/apt/sources.list, replacing VERSION precise with the name of your distribution:

deb http://repo.percona.com/apt precise main
deb-src http://repo.percona.com/apt precise main

Remember to update the local cache:
$ apt-get update

Now you can install Percona XtraBackup with:
$ apt-get install percona-xtrabackup

BACKUP

innobackupex --user=USERNAME --password=PASSWORD --no-timestamp /data/backups/new_backup <--(PATH OF BACKUP)
innobackupex --apply-log /data/backups/new_backup

RESTORE

service mysql stop
mkdir /tmp/mysql
mv /var/lib/mysql/* /tmp/mysql/
innobackupex --copy-back /data/backups/new_backup <--(PATH OF BACKUP WHERE IS STORED)
chown -R mysql: /var/lib/mysql
service mysql start

Getting the shell script:
wget https://launchpadlibrarian.net/78745738/tuning-primer.sh

Running:
sh tuning-primer.sh

Here are simple steps to convert a rpm package to deb package and install.

sudo apt-get install alien

wget http://tinyurl.com/ptvn89k

sudo alien ibus-typing-booster-1.2.3-4.el7.noarch.rpm

sudo dpkg -i ibus-typing-booster_1.2.3-5_all.deb

Upgrade from 14.04 to 15.04 is a 2 step journey.

sudo nano /etc/update-manager/release-upgrades
change the value to normal

And then use this command twice!
sudo do-release-upgrade

You can check your ubuntu version:

lsb_release -a
Description: Ubuntu 15.04

Here is how to install Libre office on centOS

64 bit
wget http://download.documentfoundation.org/libreoffice/stable/4.4.4/rpm/x86_64/LibreOffice_4.4.4_Linux_x86-64_rpm.tar.gz

32 bit
wget http://download.documentfoundation.org/libreoffice/stable/4.4.4/rpm/x86/LibreOffice_4.4.4_Linux_x86_rpm.tar.gz

tar xvf LibreOffice_4.4.4_Linux_x86_rpm.tar.gz

rpm -Uvh LibreOffice_4.4.4.3_Linux_x86_rpm/RPMS/*.rpm

Here is how you can open and copy files from an iso image.

mkdir /mnt/iso
mount -t iso9660 -o loop /root/Downloads/ubuntu-15.04-desktop-i386.iso /mnt/iso/

ls /mnt/iso/