Answer Posted / niranjan

Ankur ur right... internal commands dont invoke a child process to excute the command. and there by faster execution.

Where as external commands forked as child process...

What is the use of egrep command in unix?

1176

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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:

2262

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What is updatedb?

1039

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What is the functionality of a top command?

1101

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Is grep faster than awk?

1037

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How do I search a whole word in vim?

1171

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Which command can you use to find the currently running process in unix server?

1117

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What is the size of time_t?

1206

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What is the use of sed command in unix?

1196

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Explain ‘library functions’ with respect to unix commands?

1168

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How does pipe () work?

1088

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

1252

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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?

1395

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How many unix commands are there?

1145

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Who wrote grep?

1056

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