Convert a decimal number to octal, hexadecimal, binary, or anything 

bc <<< 'obase=2;1234'

April 12, 2012 — openiduser43

Explanation

<<< word is here-string syntax, a variant of here-documents.

data-manipulation number-conversion
bc

Related one-liners

Convert a decimal number to octal, hexadecimal, binary, or anything 

echo 'obase=2;1234' | bc

April 11, 2012 — bashoneliners