Answer Posted / rahul magdum

#include sys/types.h
#include unistd.h
#include sys/stat.h

main()
{
Int pid=fork();
Int fd=creat("op.txt",S_IRWXU);
If(pid!=0 && pid!=-1)
{
close(1); // stdout
dup(fd); // replace file descriptor
execlp("ls","ls","-l",null);
close(fd);

}
}

Explain the unmount system calls?

961

---

Explain the mount and unmount system calls?

1077

---

What is the fork() system call?

947

---

What is the difference between command and utility in unix?

941

---

Explain the difference between command and utility in unix?

970

---

Name the command which is used to execute system calls from exe?

953

---

Explain c program to implement the unix or linux command to implement ls -l >output.txt?

834

---

Tell me how to protect a process from others to kill?

842

---

What is the first process created by the kernel in unix?

881

---

The very first process created by the kernel in unix is?

864

---

What are the possible return values of kill() system call?

852

---

How to protect a process from others to kill?

971

---

Explain the mount system calls?

969

---