Estou executando o Ubuntu 14.04 (32 bits) no meu sistema e quero usar o MATLAB (64 bits). Como minha instalação do Ubuntu é de 32 bits, não consigo instalar o MATLAB nele. Eu li que eu deveria ser capaz de executar um aplicativo de 64 bits no Ubuntu de 32 bits, se meu kernel é de 64 bits. Eu li esta questão e sua resposta, mas eu vi esses erros.
$ sudo dpkg --add-architecture amd64
$ sudo apt-get update
Fetched 3,499 kB in 11s (304 kB/s)
Reading package lists... Done
W: GPG error: http://ppa.launchpad.net trusty InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 531EE72F4C9D234C
W: Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_trusty-security_main_binary-amd64_Packages)
W: Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ trusty-security/restricted amd64 Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_trusty-security_restricted_binary-amd64_Packages)
W: Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ trusty-security/main i386 Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_trusty-security_main_binary-i386_Packages)
W: Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ trusty-security/restricted i386 Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_trusty-security_restricted_binary-i386_Packages)
$ sudo apt-get install linux-image-amd64:amd64
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package linux-image-amd64