diego, i have this error when running your first command. Also alkabuze how do I update my source.list?

root@kali:~# dpkg –add-architecture i386
dpkg: error: need an action option

Type dpkg –help for help about installing and deinstalling packages [*];
Use ‘apt’ or ‘aptitude’ for user-friendly package management;
Type dpkg -Dhelp for a list of dpkg debug flag values;
Type dpkg –force-help for a list of forcing options;
Type dpkg-deb –help for help about manipulating *.deb files;

Options marked [*] produce a lot of output – pipe it through ‘less’ or ‘more’ !
root@kali:~# sudo dpkg –add-architecture i386
dpkg: error: need an action option

Type dpkg –help for help about installing and deinstalling packages [*];
Use ‘apt’ or ‘aptitude’ for user-friendly package management;
Type dpkg -Dhelp for a list of dpkg debug flag values;
Type dpkg –force-help for a list of forcing options;
Type dpkg-deb –help for help about manipulating *.deb files;

Options marked [*] produce a lot of output – pipe it through ‘less’ or ‘more’ !
root@kali:~#