Segmentation fault when modifying a string

Question

I am getting segmentation fault error in this code, but don't know why?

#include <stdio.h>

int main(void)
{
    char *ptr = "Linux";
    *ptr = 'T';

    printf("\n [%s] \n", ptr);

    return 0;
}

Answer 1

ptr is a pointer that points to a string literal, but you can't modify a string literal, change it to:

char ptr[] = "Linux";

Answer 2

The fault is

*ptr = 'T';

It should be a char array,not a string.