How to Create Infinite while Loop in Bash Script

To set an infinite while loop use:

1. true command - do nothing, successfully (always returns exit code 0)
2. false command - do nothing, unsuccessfully (always returns exit code 1)
3. : command - no effect; the command does nothing (always returns exit code 0)

1. How do you make an infinite loop in bash?
2. How do you make an infinite while loop?
3. How do you write a while loop in bash?
4. How do I run a shell script continuously?
5. How do you make an infinite loop in Linux?
6. How do you kill a true loop?
7. What is while loop example?
8. Why is my while loop infinite?
9. What will happen if an infinite while loop is run in Javascript?
10. How do you end a while loop in bash?
11. How do you write a while loop in Unix?
12. How do you end a while loop?

How do you make an infinite loop in bash?

There are few ways to create an infinite loop in bash, sometimes called an endless loop. You can either use the for , while , or until construct. [me@linux ~]$ for ((;;)); do echo "infinite loop"; done infinite loop ... [me@linux ~]$ while :; do echo "infinite loop"; done infinite loop ...

How do you make an infinite while loop?

The above do.. while loop represents the infinite condition as we provide the '1' value inside the loop condition. As we already know that non-zero integer represents the true condition, so this loop will run infinite times. We can also use the goto statement to define the infinite loop.

How do you write a while loop in bash?

Create a bash file named while1.sh which contains the following script.

1. n=1. while [ $n -le 5 ] do. echo "Running $n time" (( n++ )) done.
2. n=1. while [ $n -le 10 ] do. if [ $n == 6 ] then. echo "terminated" break. fi. echo "Position: $n" ...
3. n=0. while [ $n -le 5 ] do. (( n++ )) if [ $n == 3 ] then. continue. fi. echo "Position: $n"

How do I run a shell script continuously?

How to Run or Repeat a Linux Command Every X Seconds Forever

1. Use watch Command. Watch is a Linux command that allows you to execute a command or program periodically and also shows you output on the screen. ...
2. Use sleep Command. Sleep is often used to debug shell scripts, but it has many other useful purposes as well.

How do you make an infinite loop in Linux?

To set an infinite while loop use:

1. true command - do nothing, successfully (always returns exit code 0)
2. false command - do nothing, unsuccessfully (always returns exit code 1)
3. : command - no effect; the command does nothing (always returns exit code 0)

How do you kill a true loop?

Press Ctrl+C to kill.

What is while loop example?

Example 1: while loop

When i is 1, the test expression i <= 5 is true. Hence, the body of the while loop is executed. This prints 1 on the screen and the value of i is increased to 2. ... When i is 6, the test expression i <= 5 will be false and the loop terminates.

Why is my while loop infinite?

Basically, the infinite loop happens when the condition in the while loop always evaluates to true. This can happen when the variables within the loop aren't updated correctly, or aren't updated at all. Let's say you have a variable that's set to 10 and you want to loop while the value is less than 100.

What will happen if an infinite while loop is run in Javascript?

An infinite loop will run forever, but the program can be terminated with the break keyword. In the below example, we will add an if statement to the while loop, and when that condition is met, we will terminate the loop with break .

How do you end a while loop in bash?

You can also use the true built-in or any other statement that always returns true. The while loop above will run indefinitely. You can terminate the loop by pressing CTRL+C .

How do you write a while loop in Unix?

Syntax. Here the Shell command is evaluated. If the resulting value is true, given statement(s) are executed. If command is false then no statement will be executed and the program will jump to the next line after the done statement.

How do you end a while loop?

The break statement exits a for or while loop completely. To skip the rest of the instructions in the loop and begin the next iteration, use a continue statement. break is not defined outside a for or while loop. To exit a function, use return .