Answer Posted / boss

cat file1 file2 > tmp && mv tmp file2

Write a command to display a file’s contents in various formats?

1161

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What is awk command used for?

1146

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Name the unix command to find how many days the server has been up.

1119

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How do I delete files from command prompt?

1165

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What is merge command in unix?

1454

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What is grep short for?

1009

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

1217

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What is the use of awk command in unix?

1080

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How do you grep a case insensitive?

1004

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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:

2214

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How do I use nslookup?

1055

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What does the “echo” command do?

1105

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What is the unix command to confirm a remote host is alive or not?

1153

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What is grep r?

1049

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Explain ‘system calls’ with respect to unix commands?

1054

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