Answer Posted / jam

To print a specific line without using a string.

sed -n '1p' <filename>

Where 1 is teh line number

What is the command to view process running?

1104

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What is the use of the tee command?

1097

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

1219

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How do you repeat a command in terminal?

1224

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What is grep r?

1096

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What is command substitution?

1357

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Which command is used to delete all files in the current directory and all its sub-directories?

1254

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What is the behavioural difference between cmp and diff commands?

1281

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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:

2265

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How do I find previous commands in unix?

1186

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Explain how to use grep command to list find the records of a file containing 10 different strings?

1067

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1108

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1182

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What is the first character of the output in ls l command?

1210

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1179

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