Answer Posted / sangu

echo is also used to append the data or overwrite the data
for the existing file.

eg1:
echo "string" > filename --- overwrite the data in the
file

eg2:
echo "string" >> filename --- append the string in the
file.

What do chgrp command do?

850

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What is awk command used for?

796

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Why is shebang used?

820

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What is merge command in unix?

1161

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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:

1990

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What is grep r?

807

---

What is the search command in unix?

835

---

What is ctrl d?

822

---

Enlist some filename manipulation commands in unix.

774

---

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

877

---

What is awk good for?

803

---

What is difference between grep and find command in unix?

854

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How does shebang work?

816

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Which command is used to find whether the system is 32 bit or 64 bit?

851

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what is the advaantage of each user having its own copy of the shell?

2312

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