Answer Posted / phani

FIND & GREP
Basically FIND & GREP are the UNIX commands shared through
the FILTERS .Where is SED (STREAM) is one of the main
editor.

FIND : Find is an exclusive command used to find
files/folders are other information.and this is powerfull
then windows.

ex : # find /raja -name shekar -print
output : raja/shekar


Grep : This is also one of the important command used to
globally searching the regular expression in the file .
GERP is grepping the information character by character.
(i.e) from file .

ex 1) : #GREP "cat" raja
2) : #GREP -i "cat" raja (for case sensitive)
2) : #GREP -v "cat" raja (v represent negative )

OUTPUT :if we have an file raja with data regarding cat we
can clearly explain.


Finally SED (STREAM)

SED : It is an editor but non interactive .

ex : # sed -e 'd/chain/dog/f' raja > shekar

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

1448

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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:

2316

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What is awk command used for?

1325

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Explain the terms ‘system calls’ and ‘library functions’ with respect to unix commands?

1264

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Is there any method to erase all files in the current directory, along with its all sub-directories, by using only one command?

1281

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

1278

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How do I find previous commands in unix?

1245

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Why is it called a shebang?

1245

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

2177

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What is the search command in unix?

1131

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How do I run a bash script?

1235

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What is the use of egrep command in unix?

1240

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Is command prompt unix?

1215

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What does find command return in unix?

1200

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Which command is used to restrict incoming messages?

1145

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