Answer Posted / saheed

rm -rf directoryName with out confirmation

Can you explain a little bit about command substitution?

610

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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:

1762

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Explain the terms ‘system calls’ and ‘library functions’ with respect to unix commands?

642

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What is grep and how do you use it?

577

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What will the following command do?

615

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What does #!/ Bin sh do?

591

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What is the pipe command?

578

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What are reported commands?

566

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Name the various commands that are used for the user information in unix.

539

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What is rmdir command?

553

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What does the command ' $who | sort –logfile > newfile' do?

770

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What is “chmod” command?

566

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What is the comma to show the space allocation of files?

560

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How can you see the command line history?

586

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What is the use of find command in unix?

584

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