Linuxfork endless loop bomb and its Prevention

Run this code in Linux: () {:|:& amp ;};: this will cause a crash. once executed, the only method is to restart the system. In fact, this code is an infinite recursive code that consumes system resources. This article provides a detailed explanation of this code. to prevent fork bombs, the method is to restrict the ability of users

Execute this code in Linux: () {:|:&};:will cause a crash. once executed, the only method is to restart the system. In fact, this code is an infinite recursive code that consumes system resources.

This article provides a detailed explanation of this code. to prevent fork bombs, the method is to limit the number of processes that can be started by the user. Edit the/etc/security/limits. conf file and add:

* Hard nproc 200
Limit the number of processes to 200. after testing, the root account is not restricted.

Q. Can you explain following bash code or bash fork () bomb?
:() {:| :&};:

A. this is a bash function. it gets called recursively (recursive function ). this is most horrible code for any Unix/Linux box. it is often used by sys admin to test user processes limitations (Linux process limits can be configured via/etc/security/limits. conf and PAM ).

Once a successful fork bomb has been activated in a system it may not be possible to resume normal operation without rebooting, as the only solution to a fork bomb is to destroy all instances of it.
WARNING! These examples may crash your computer if executed.
Understanding :() {:|:&};: fork () bomb code

()-It is a function name. It accepts no arguments at all. Generally, bash function is defined as follows:
Foo (){
Arg1 = $1
Echo
# Do_something on $ arg argument
}

Fork () bomb is defined as follows:
:(){
: | :&
};:

: |:-Next it call itself using programming technique called recursion and pipes the output to another call of the function:. The worst part is function get called two times to bomb your system.

&-Puts the function call in the background so child cannot die at all and start eating system resources.

;-Terminate the function definition

:-Call (run) the function aka set the fork () bomb.

Here is more human readable code:
Bomb (){
Bomb | bomb &
}; Bomb

Properly configured Linux/UNIX box shocould not go down when fork () bomb sets off.