Answer Posted / opensky

multi-tasking is general term.
multi-user, is facility that allow access simultaneously to
multiple users.
multi-processing, is facility, where multiple process can
run on OS.
time sharing, is again general term.

What is the use of egrep command in unix?

633

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What is grep command in unix with examples?

616

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How do I use grep to search for a file?

588

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What do chgrp command do?

604

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Enumerate some of the most commonly used network commands in unix?

628

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What is the pipe command?

594

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Enlist some filename manipulation commands in unix.

562

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What are the differences among a system call, a library function, and a unix command?

580

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What is the comma to display different lines that are found when compare two files?

601

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How do you grep recursively?

568

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Can you explain a little bit about command substitution?

624

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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:

1774

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What will the following command do?

627

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Why is shebang used?

604

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Is grep faster than awk?

573

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