cracklib-check
Mide la fortaleza de una contraseña.
$ echo "LinUx_f1nt1stic0" | cracklib-check
LinUx_f1nt1stic0: OK
$ echo "linux12" | cracklib-check
linux12: it is based on a dictionary word
Puede usar el modo interactivo:
$ cracklib-check
54321
54321: it is too short
linux2
linux2: it is based on a dictionary word
HueñPP9-?"HgfR
HueñPP9-?"HgfR: OK