Answer Posted / ajaya kumar

at time commandname - Executes the command at the
perticular time.
crontab -e and type the scheduled job with appropriate
syntax.
- Executes the script at the scheduled times.

Is ‘du’ a command? If so, what is its use?

840

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What are the dos commands?

873

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What is the difference between cat and more command?

902

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What is rmdir command?

792

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How do you grep recursively?

775

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What is .sh file?

839

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Does cp command overwrite files?

830

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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:

1974

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Explain ‘system calls’ with respect to unix commands?

785

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What's a command word?

802

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

804

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Which command is used to kill the last background job?

1012

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Describe the usage and functionality of the command rm –r * in unix?

1470

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Is it inbetween or in between?

799

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Who command in unix operating system?

860

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