ln -s /usr/bin/perl "/usr/bin/perl$(echo -e "\r")"

##</code><code>##

ln -s /usr/bin/perl /usr/bin/perl^V^M

##</code><code>##

$ ls /bin/bash* | cat -v
/bin/bash
/bin/bash^M
$ file /bin/bash^M
: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.0.30, dynamically linked (uses shared libs), for GNU/Linux 2.0.30, stripped
$ /bin/bash^M
Your shell script has DOS linefeeds in it!

##</code><code>##

Your Perl script has DOS linefeeds in it!
If you uploaded it to the server via FTP please upload it again in ASCII mode.

##</code><code>##

set ff=unix

##</code><code>##

:%s/^V^M//g