Debian – How to recover from a deleted /bin/bash

bashdebianundelete

On my debian maschine I deleted /bin/bash by accident. Is there a way to get it back without reinstalltin the machine?

If it helps. I'm still logged in. Guess once I'm out I cannot log in since it's my login shell.

ln -s /bin/sh /bin/bash
apt-get install --reinstall bash

This will return true if a variable is unset or set to the empty string ("").

if [ -z "${VAR}" ];

As of GNU coreutils 7.5 released in August 2009, sort allows a -h parameter, which allows numeric suffixes of the kind produced by du -h:

du -hs * | sort -h

If you are using a sort that does not support -h, you can install GNU Coreutils. E.g. on an older Mac OS X:

brew install coreutils
du -hs * | gsort -h

From sort manual:

-h, --human-numeric-sort compare human readable numbers (e.g., 2K 1G)