ubuntu@ubuntu:~$ sudo apt-get install ettercap
Leyendo lista de paquetes... Hecho
Creando árbol de dependencias       
Leyendo la información de estado... Hecho
E: No se pudo encontrar el paquete ettercap
ubuntu@ubuntu:~$ 

wget http://downloads.sourceforge.net/project/ettercap/ettercap/NG-0.7.3/ettercap-NG-0.7.3.tar.gz?use_mirror=heanet
tar zxvf ettercap-NG-0.7.3.tar.gz
cd ettercap-NG-0.7.3/

ubuntu@ubuntu:~/ettercap-NG-0.7.3$ ./configurechecking whether to enable maintainer-specific portions of Makefiles... no

Configuring ettercap NG-0.7.3...

checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for gawk... no
checking for mawk... mawk
checking whether make sets $(MAKE)... yes
checking build system type... i686-pc-linux-gnu
checking host system type... i686-pc-linux-gnu
checking for gcc... gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables... 
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ANSI C... none needed
checking for style of include used by make... GNU
checking dependency style of gcc... gcc3
checking for gcc... (cached) gcc
checking whether we are using the GNU C compiler... (cached) yes
checking whether gcc accepts -g... (cached) yes
checking for gcc option to accept ANSI C... (cached) none needed
checking dependency style of gcc... (cached) gcc3
checking for a BSD-compatible install... /usr/bin/install -c
checking whether make sets $(MAKE)... (cached) yes
checking how to run the C preprocessor... gcc -E
checking for egrep... grep -E
checking whether gcc needs -traditional... no
checking if your compiler supports __VA_ARGS__ in macro declarations... yes
checking for bison... no
checking for byacc... no
checking for flex... no
checking for lex... no
checking for yywrap in -lfl... no
checking for yywrap in -ll... no
checking for a sed that does not truncate output... /bin/sed
checking for ld used by gcc... /usr/bin/ld
checking if the linker (/usr/bin/ld) is GNU ld... yes
checking for /usr/bin/ld option to reload object files... -r
checking for BSD-compatible nm... /usr/bin/nm -B
checking whether ln -s works... yes
checking how to recognise dependent libraries... pass_all
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
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checking for unistd.h... yes
checking dlfcn.h usability... yes
checking dlfcn.h presence... yes
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checking for g++... no
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checking whether we are using the GNU C++ compiler... no
checking whether g++ accepts -g... no
checking dependency style of g++... none
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checking for gfortran... no
checking whether we are using the GNU Fortran 77 compiler... no
checking whether  accepts -g... no
checking the maximum length of command line arguments... 32768
checking command to parse /usr/bin/nm -B output from gcc object... ok
checking for objdir... .libs
checking for ar... ar
checking for ranlib... ranlib
checking for strip... strip
checking for correct ltmain.sh version... yes
checking if gcc static flag  works... yes
checking if gcc supports -fno-rtti -fno-exceptions... no
checking for gcc option to produce PIC... -fPIC
checking if gcc PIC flag -fPIC works... yes
checking if gcc supports -c -o file.o... yes
checking whether the gcc linker (/usr/bin/ld) supports shared libraries... yes
checking whether -lc should be explicitly linked in... no
checking dynamic linker characteristics... GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking for shl_load... no
checking for shl_load in -ldld... no
checking for dlopen... no
checking for dlopen in -ldl... yes
checking whether a program can dlopen itself... yes
checking whether a statically linked program can dlopen itself... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... no
configure: creating libtool
appending configuration tag "CXX" to libtool
appending configuration tag "F77" to libtool
checking for library containing dlopen... -ldl
checking for an ANSI C-conforming const... yes
checking for dirent.h that defines DIR... yes
checking for library containing opendir... none required
checking which extension is used for loadable modules... .so
checking which variable specifies run-time library path... LD_LIBRARY_PATH
checking for the default library search path... /lib /usr/lib
checking for objdir... .libs
checking whether libtool supports -dlopen/-dlpreopen... yes
checking for shl_load... (cached) no
checking for shl_load in -ldld... (cached) no
checking for dlopen in -ldl... (cached) yes
checking for dlerror... yes
checking for _ prefix in compiled symbols... no
checking whether deplibs are loaded by dlopen... yes
checking argz.h usability... yes
checking argz.h presence... yes
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checking assert.h usability... yes
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checking ctype.h usability... yes
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checking errno.h usability... yes
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checking malloc.h usability... yes
checking malloc.h presence... yes
checking for malloc.h... yes
checking for memory.h... (cached) yes
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checking stdio.h usability... yes
checking stdio.h presence... yes
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checking for unistd.h... (cached) yes
checking dl.h usability... no
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checking dld.h usability... no
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checking mach-o/dyld.h usability... no
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checking for string.h... (cached) yes
checking for strchr... yes
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checking for memmove... yes
checking for strcmp... yes
checking for closedir... yes
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checking for library containing lt_dlopen... no
checking for dlfcn.h... (cached) yes
checking ltdl.h usability... no
checking ltdl.h presence... no
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checking whether byte ordering is bigendian... no
checking for ANSI C header files... (cached) yes
checking whether time.h and sys/time.h may both be included... yes
checking for dirent.h that defines DIR... (cached) yes
checking for library containing opendir... (cached) none required
checking for unistd.h... (cached) yes
checking for stdlib.h... (cached) yes
checking signal.h usability... yes
checking signal.h presence... yes
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checking stdarg.h usability... yes
checking stdarg.h presence... yes
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checking sys/ioctl.h usability... yes
checking sys/ioctl.h presence... yes
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checking for sys/types.h... (cached) yes
checking dirent.h usability... yes
checking dirent.h presence... yes
checking for dirent.h... yes
checking for errno.h... (cached) yes
checking fcntl.h usability... yes
checking fcntl.h presence... yes
checking for fcntl.h... yes
checking for ctype.h... (cached) yes
checking libgen.h usability... yes
checking libgen.h presence... yes
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checking for stdint.h... (cached) yes
checking sys/time.h usability... yes
checking sys/time.h presence... yes
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checking sys/utsname.h usability... yes
checking sys/utsname.h presence... yes
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checking termios.h usability... yes
checking termios.h presence... yes
checking for termios.h... yes
checking sys/poll.h usability... yes
checking sys/poll.h presence... yes
checking for sys/poll.h... yes
checking poll.h usability... yes
checking poll.h presence... yes
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checking sys/select.h usability... yes
checking sys/select.h presence... yes
checking for sys/select.h... yes
checking sys/cdefs.h usability... yes
checking sys/cdefs.h presence... yes
checking for sys/cdefs.h... yes
checking arpa/nameser.h usability... yes
checking arpa/nameser.h presence... yes
checking for arpa/nameser.h... yes
checking for NS_GET32... yes
checking whether struct tm is in sys/time.h or time.h... time.h
checking for pid_t... yes
checking for size_t... yes
checking for an ANSI C-conforming const... (cached) yes
checking return type of signal handlers... void
checking for vprintf... yes
checking for _doprnt... no
checking for library containing pthread_create... -lpthread
checking whether gcc accepts -pthread... yes
checking for getifaddrs... yes
checking for gettimeofday... yes
checking for vsnprintf... yes
checking for select... yes
checking for poll... yes
checking for strdup... yes
checking for strerror... yes
checking for strstr... yes
checking for strsignal... yes
checking for strtok_r... yes
checking for uname... yes
checking for daemon... yes

Checking for required libraries...

checking for library containing gethostbyname... none required
checking for library containing socket... none required
checking for library containing poll... none required
checking for library containing gzopen... no
configure: error: not found.

ubuntu@ubuntu:~/ettercap-NG-0.7.3$ make clean
make: *** No hay ninguna regla para construir el objetivo `clean'.  Alto.
ubuntu@ubuntu:~/ettercap-NG-0.7.3$ make
make: *** No se especificó ningún objetivo y no se encontró ningún makefile.  Alto.
ubuntu@ubuntu:~/ettercap-NG-0.7.3$ make install
make: *** No hay ninguna regla para construir el objetivo `install'.  Alto.