Explain piping.

958

Explain the terms links and symbolic links with respect to unix?

1066

What are reported commands?

1188

Write a command that will allow a unix system to shut down in 15 minutes, after which it will perform a reboot.

1319

Explain the importance of directories in a unix system

1102

What is the window of the working set of a process?

1120

Why is it that it is not advisable to use root as the default login?

1030

What is nr in awk command?

1271

How do you grep a case insensitive?

1110

How do unix sockets work?

895

What is the use of find command in unix?

1207

What do chmod command do?

1282

When i run a programm of orphan process. Instead of getting child's parent (ppid)=1 ..i get 1400 and it varies as per system. How can i findthe right soluion??? My pgm: #include # include int main() { int pid; pid=fork(); if(pid < 0) {exit(-1);} else if(pid==0) { printf("Child Process is Sleeping ..."); sleep(10); printf("Orphan Child's Parent ID : %u ",getppid()); } else { printf("Parent Process Completed ... %u ",getpid()); exit(0); } return 0; } Output:

2313

How to give execute permission for a file in unix?

1057

Name the general commands in using unix os for a beginner?

1213