Answer Posted / abhishek bhardwaj

If one wants to add content of file1 on top of file2 then

cat file2 >> file1

How can we use grep command in unix?

1159

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What is the use of find command in unix?

1101

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How do I search for a file in unix command?

987

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Is there a way to erase all files in the current directory, including all its sub-directories, using only one command?

1353

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What is the general format of unix command syntax?

1823

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What is “chmod” command?

1113

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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:

2217

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Which unix command to make a new directory?

1083

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Are you in or at the office?

1089

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Explain mount and unmount command.

1163

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What are reported commands?

1090

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Why is it called grep?

978

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What is the use of egrep command in unix?

1142

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What are the general commands in using unix os for a beginner?

1127

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How do I clear my terminal history?

1105

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