Source
--- chkrootkit.orig 2009-07-30 09:10:54.000000000 -0500
+++ chkrootkit 2013-12-11 13:23:15.000000000 -0600
# (c)1997-2009 Nelson Murilo, Pangeia Informatica, AMS Foundation and others.
# All rights reserved
+cd "$(dirname "$0")"
+
### workaround for some Bourne shell implementations
unalias login > /dev/null 2>&1
unalias ls > /dev/null 2>&1