Procedemos a la descarga

sudo apt-get install autogen automake1.9 libtool
wget http://media-2.cacetech.com/wireshark/src/wireshark-1.4.0rc1.tar.bz2
tar xjvf wireshark-1.4.0rc1.tar.bz2
cd wireshark-1.4.0rc1
./autogen.sh
./configure

configure: error: I couldn't find yacc (or bison or ...); make sure it's installed and in your path

configure: error: I couldn't find flex; make sure it's installed and in your path

checking for GTK+ - version >= 2.4.0... no
*** Could not run GTK+ test program, checking why...
*** The test program failed to compile or link. See the file config.log for the
*** exact error that occured. This usually means GTK+ is incorrectly installed.
configure: error: GTK+ 2.4 or later isn't available, so Wireshark can't be compiled

checking for pcap.h... no
configure: error: Header file pcap.h not found; if you installed libpcap
from source, did you also do "make install-incl", and if you installed a
binary package of libpcap, is there also a developer's package of libpcap,
and did you also install that package?

Para arreglar el problema de las librerías faltantes instalamos lo siguiente:

sudo apt-get install bison flex libgtkmm-2.4-dev libpcap0.8-dev 

volvemos a configurar y obtenemos el siguiente resultado

 Install dumpcap with capabilities : no
             Install dumpcap setuid : no
                  Use dumpcap group : (none)
                    Use lua library : no
                 Use python binding : no
                   Build rtp_player : no
                        Use threads : no
             Build profile binaries : no
                   Use pcre library : no (using GRegex instead)
               Use kerberos library : no
                 Use c-ares library : no
               Use GNU ADNS library : no
                Use SMI MIB library : no
             Use GNU crypto library : no
             Use SSL crypto library : no
                 Use gnutls library : no
     Use POSIX capabilities library : no
                  Use GeoIP library : no

Instalamos las librerias faltantes para utilizar la mayor cantidad de opciones en wireshark

sudo apt-get install liblua5.1-dev libpcre3-dev libc-ares-dev libadns1-dev libsmi2-dev libgnutls-dev libgeoip-dev libportaudio-dev libcap2-dev

volvemos a configurar

./configure
make
sudo make install

  JDownloader ya está disponible para instalar desde los repositorios de Ubuntu, tan facil como:

• sudo add-apt-repository ppa:jd-team/jdownloader

• sudo apt-get update && sudo apt-get install jdownloader

  Para borrar un kernel antiguo se pueden seguir los siguientes pasos:

• verificar las versiones disponibles en nuestro sistema:

sudo dpkg -l | grep linux-image

• borrar las versiones antiguas que no utilizamos:

sudo apt-get remove --purge KERNEL

Donde KERNEL es la versión a eliminar, algo del estilo "linux-image-2.6.20-15-generic".