Answer Posted / kiruthiga.s

rm - r*

What is grep r?

1091

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What is the use of egrep command in unix?

1179

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What is grep command in unix with examples?

1212

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What does pipe () return?

1070

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

2090

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Explain ‘system calls’ with respect to unix commands?

1091

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Who command in unix?

1136

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Describe the zip/unzip command using gzip.

1155

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

1209

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Differentiate cmp command from diff command.

1166

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What happens when we execute a unix command?

1134

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Why is it called a shebang?

1179

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Write a command to kill the last background job?

1098

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What does the command ' $who | sort –logfile > newfile' do?

1270

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