Installing IRSTLM on Ubuntu

1. Get the source from here http://sourceforge.net/projects/irstlm/
2. Installing some dependencies

   sudo apt-get install build-essential
   sudo apt-get install automake
   sudo apt-get install libtool
   
   sudo apt-get install zlib1g-dev

3. Extracting files

   sudo mkdir -p /usr/local/src/irstlm
   sudo chown username /usr/local/src/irstlm
   
   tar -xvzf irstlm.tgz -C /usr/local/src/irstlm

4. Compiling

   sudo mkdir -p /usr/local/lib/irstlm 
   sudo chown username /usr/local/lib/irstlm
   
   ./regenerate-makefiles.sh
   
   ./configure --prefix=/usr/local/lib/irstlm --enable-caching
   
   make -j 4

5. Installing

   make -j 4 install
   
   sudo ln -sfn /usr/local/lib/irstlm/bin/add-start-end.sh /usr/local/bin
   sudo ln -sfn /usr/local/lib/irstlm/bin/build-lm-qsub.sh /usr/local/bin
   sudo ln -sfn /usr/local/lib/irstlm/bin/build-lm.sh /usr/local/bin
   sudo ln -sfn /usr/local/lib/irstlm/bin/build-sublm.pl /usr/local/bin
   sudo ln -sfn /usr/local/lib/irstlm/bin/compile-lm /usr/local/bin
   sudo ln -sfn /usr/local/lib/irstlm/bin/dict /usr/local/bin
   sudo ln -sfn /usr/local/lib/irstlm/bin/goograms2ngrams.pl /usr/local/bin
   sudo ln -sfn /usr/local/lib/irstlm/bin/interpolate-lm /usr/local/bin
   sudo ln -sfn /usr/local/lib/irstlm/bin/lm-stat.pl /usr/local/bin
   sudo ln -sfn /usr/local/lib/irstlm/bin/merge-sublm.pl /usr/local/bin
   sudo ln -sfn /usr/local/lib/irstlm/bin/ngram-split.pl /usr/local/bin
   sudo ln -sfn /usr/local/lib/irstlm/bin/ngt /usr/local/bin
   sudo ln -sfn /usr/local/lib/irstlm/bin/plsa /usr/local/bin
   sudo ln -sfn /usr/local/lib/irstlm/bin/prune-lm /usr/local/bin
   sudo ln -sfn /usr/local/lib/irstlm/bin/quantize-lm /usr/local/bin
   sudo ln -sfn /usr/local/lib/irstlm/bin/rm-start-end.sh /usr/local/bin
   sudo ln -sfn /usr/local/lib/irstlm/bin/score-lm /usr/local/bin
   sudo ln -sfn /usr/local/lib/irstlm/bin/sort-lm.pl /usr/local/bin
   sudo ln -sfn /usr/local/lib/irstlm/bin/split-dict.pl /usr/local/bin
   sudo ln -sfn /usr/local/lib/irstlm/bin/split-ngt.sh /usr/local/bin
   sudo ln -sfn /usr/local/lib/irstlm/bin/tlm /usr/local/bin