Answer Posted / arjun

$? it will give the status of the previous command
it will give 0(zero) last command is successful else it will
give any non-zero character.

Is it inbetween or in between?

587

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What is the function of grep command in unix?

591

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

595

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Why is awk called awk?

581

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hw will u use awk in replacing cahrs and files

2736

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

644

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What is the difference between awk and grep?

561

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What is the use of sed command in unix?

601

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What does the “echo” command do?

624

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What does the metacharacter mean?

612

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Why is it called a shebang?

574

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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:

1764

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What is unix command?

584

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What does 'mkdir' command do in UNIX?

660

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How do I search for text in vi?

588

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