Answer Posted / gogune suresh kumar

Both serves the purpose of "pattern matching" in files.
SED has more features compared to simple GREP. Ex: like
replacement of existing string with new string. Deleting the
lines in a file etc.

How many unix commands are there?

1142

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

1206

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What command is used to switching between users in unix?

1074

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What is awk good for?

1129

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

1199

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What is time_t?

1099

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How do I use grep to find a file?

1101

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What is the pipe command?

1176

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Explain ‘library functions’ with respect to unix commands?

1162

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What is the difference between cat and more command?

1285

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Which unix command to make a new directory?

1129

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What is {} in find command?

1095

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What is used to type command?

1056

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How do I run a whois command?

1147

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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:

2255

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