To generate a strong password, use the following snippet.  It
will produce a ten-position alpha-numeric (with some limited
punctuation) that should work with most systems that require
a password.

echo `date +%Y%m%d%H%M%S` | pwhash -m | cut -b25-34

Note that ten positions is the minimum you should use; if the
system you are using supports it, try for 14 or more.  The math
is simple: taking just the case sensitive alpha-numeric, there
are 62 values (26 lower, 26 upper, 10 digits).  At 10 positions,
there are 839299365868340224 possible choices; in theory, that
would be very hard to break.  Just adding 4 more positions, the
12401769434657526912139264 possible choices would take centuries
to break even at 1 trillion hashes a second.