cd /ext/cmp
wget http://prdownloads.sourceforge.net/ngrep/ngrep-1.45.tar.bz2?download
cd ../exp
tar jxvf ../cmp/ngrep-1.45.tar.bz2
cd ngrep-1.45
./configure --prefix=/ext/env/ngrep-1.45
make
make install
cd /ext/bin
ln -s /ext/env/ngrep-1.45/bin/ngrep .