Search and replace on the bash shell is very useful for various one-liner shell commands. The below example shows how to replace a # character with a * character. [email protected]:/mnt/c/Users/johnc/Documents$ cat ip.c | sed ‘s/#/*/gi;’ *include <stdio.h>   int main() { printf(".");   return 0; }[email protected]:/mnt/c/Users/johnc/Documents$ cat ip.c | sed ‘s/#/*/gi;’ *include <stdio.h> int main() …