kishore kumar

• Mar 31st, 2006

 

GREP is pattern checking command .

it will contain many option like -c and soon

it is very useful when checking for pattern from the file

myquery

 Profile Answers by myquery Questions by myquery

• Mar 31st, 2006

 

Grep :command is used to search for a string in a file.

muru

• Nov 21st, 2006

 

Grep - stands for Globally Search a Regular Expression and Print. It is used to search a given string/pattern under the given path and list out all the occurances of it in a file or set of files. Following are the options available for grep command. 1. grep "muru" . - this command search for the word "muru" in all the files under the current directory and print its occurances 2. grep -v "muru" sample.txt - this command prints all the lines in sample.txt that doesn't contain the string "muru" 3. grep -s "muru" sample.txt - this command suppresses error string if any 4. grep -n "muru" sample.txt - similar to example-1 but it also displays the line number along with the lines 5. grep -l "muru" . - similar to example-1 but here it will display only the name of the files which contains the string "muru" and not the lines it contains 6. grep -i "muru" . - similar to example-1 but it is case in sensitive 7. grep -c "muru" . - similar to example-1 it also displays total count (ie) total number of occurances of the string 8. grep -q "muru" . - if the string is found in any file then the command exit with value "0". It will not output anything. 9. grep -e "muru" -e "India" . - used to search more than one pattern at a time

cutesree

 Profile Answers by cutesree 

• Jun 3rd, 2010

 

When you want to  display the lines which do not start with #, then give following command ,

grep -v "^#" file1.txt

if you want to serach recursively in all the directories , then give ,

grep -r "string"