Busqué en este sitio por este error que me encuentro:

Stopping ADB server failed (code -1).
Unable to run 'adb': Cannot run program "/home/ariel/Downloads/adt-bundle-linux-x86_64/sdk/platform-tools/adb": error=2, No such file or directory.
Starting ADB server failed (code -1).

He usado este comando en el terminal proporcionado de este tema.

Android SDK en una máquina linux de 64 bits

EDITAR: He intentado usar este comando en la terminal:

sudo apt-get install ia32-libs

Lamentablemente, no hizo nada y mostró esto:

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package libc6-i386 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'libc6-i386' has no installation candidate