postgis_setup.txt

Install postgis dependencies:
  sudo apt-get install binutils libproj-dev gdal-bin

Install the postgis:
  sudo apt-get install postgresql-9.3-postgis-2.1

follow this link: `https://grasswiki.osgeo.org/wiki/Compile_and_Install_Ubuntu`

Install SQLite, SVN and dependencies for compiling PROJ, GEOS, GDAL/OGR, GRASS, GDAL-GRASS-PLUGIN

sudo apt-get install build-essential flex make bison gcc libgcc1 g++ cmake ccache python python-dev python-opengl python-wxversion python-wxtools python-wxgtk2.8 python-dateutil libgsl0-dev python-numpy \
  wx2.8-headers wx-common libwxgtk2.8-dev libwxgtk2.8-dbg libwxbase2.8-dev  libwxbase2.8-dbg libncurses5-dev zlib1g-dev gettext libtiff-dev libpnglite-dev libcairo2 libcairo2-dev sqlite3 libsqlite3-dev libpq-dev \
  libreadline6 libreadline6-dev libfreetype6-dev libfftw3-3 libfftw3-dev libboost-thread-dev libboost-program-options-dev resolvconf libjasper-dev subversion libav-tools libavutil-dev ffmpeg2theora \
  libffmpegthumbnailer-dev libavcodec-dev libxmu-dev libavformat-dev libswscale-dev checkinstall libglu1-mesa-dev libxmu-dev ghostscript

> for mysql support, libmysqlclient-dev is required  
  sudo apt-get install libmysqlclient-dev
> for netcdf support, netcdf-bin and libnetcdf-dev is required
  sudo apt-get install netcdf-bin libnetcdf-dev
PROJ.4:
  > Install the dev package (possibly without support for datumgrid):
    sudo apt-get install libproj-dev

GEOS:
  > Install the dev package:
    sudo apt-get install libgeos-dev
GDAL:
  > Install the dev package (possibly without support for datumgrid):
    sudo apt-get install libgdal-dev
  > For support of WMS in wxGUI install Python gdal bindings:
    sudo apt-get install python-gdal

Precompiled Dev Packeges for GDAL, PROJ, GEOS:
  sudo apt-get install libproj-dev libgdal-dev python-gdal libgeos-dev

Follow this links to install PROJ, GEOS, GDAL (in mentioned order)
 PROJ: https://docs.djangoproject.com/en/1.8/ref/contrib/gis/install/geolibs/#proj4
 GEOS: https://docs.djangoproject.com/en/1.8/ref/contrib/gis/install/geolibs/#geos
 GDAL: https://docs.djangoproject.com/en/1.8/ref/contrib/gis/install/geolibs/#gdal
 
 
 IF you ran into this Error:
 
 psql pg_testing -c "create extension postgis"
 ERROR:  could not load library "/usr/lib/postgresql/9.3/lib/postgis-2.1.so": /usr/lib/liblwgeom-2.1.3.so: undefined symbol: GEOSDelaunayTriangulation

 > identify the existence of outdated ligbeos libraries
   $ locate libgeos_c.so
 > Removal of old libgeos packages some .so files were inadvertently left behind.
   $ sudo rm /usr/local/lib/libgeos_c.so*
   $ sudo rm /usr/local/src/geos-3.3.1/capi/.libs/libgeos_c.so*
   $ sudo ldconfig
   $ sudo su postgres
   $ /etc/init.d/postgresql restart

POSTGRES:

  psql: could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
  
  (Ans:)
  Edit: postgresql.conf

  sudo vim /etc/postgresql/9.3/main/postgresql.conf

  Enable or add:

  listen_addresses = '*'

  Restart the database engine:

  sudo service postgresql restart

  Besides, you can check the file: pg_hba.conf

  sudo vim /etc/postgresql/9.3/main/pg_hba.conf
  
  And add your network or host address:
  host    all             all             104.131.189.54(Ip-Adress)/24          md5