what is the use of "grep" command?
- 6 Answers
- 12368 Views
- HCL, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / bharath
grep command is used to search a string or a keyword in a
file.
syntax:
grep 'keyword' file
| Is This Answer Correct ? | 9 Yes | 3 No |
Answer / kiran sangeri
grep is one of many standard UNIX utilities. It searches
files for specified words or patterns. First clear the
screen, then type
% grep science science.txt
As you can see, grep has printed out each line containg the
word science.
Or has it ????
Try typing
% grep Science science.txt
The grep command is case sensitive; it distinguishes
between Science and science.
To ignore upper/lower case distinctions, use the -i option,
i.e. type
% grep -i science science.txt
To search for a phrase or pattern, you must enclose it in
single quotes (the apostrophe symbol). For example to
search for spinning top, type
% grep -i 'spinning top' science.txt
Some of the other options of grep are:
-v display those lines that do NOT match
-n precede each matching line with the line number
-c print only the total count of matched lines
| Is This Answer Correct ? | 3 Yes | 1 No |
Answer / vasu
To filter desire data.
Ex: In history, to see all the commands which have
particular word like cd
#history | grep cd
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / kk11749
for example I need for list of directories means
ls -r | grep "^d"
It will be display only directories
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / durgesh srivastava
search pattern of a file system it is use of grep
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / pavankumar
grep is used to matching a pattern in a file...
we can use regular expressions in conjuction with grep.
suppose for example if you want to find the all occurences of
pavan in a file, you can use...
grep pavan *
it searches all files in the current directory files and
returns all those files which contain pavan.
| Is This Answer Correct ? | 0 Yes | 1 No |
Write a command to display a file’s contents in various formats?
What does mkdir up2date; touch outdated up2date do?
what is Online(STM) and offline diagnostics in HP-UX?
What is the use of the tee command?
what is the difference between pipe(|) and tee command..
What is command statement?
in UNIX,How to copy file into directory?
What does this command do? Cat food 1 > kitty
How we will execute previous command in vi editor?
How does pipe () work?
How do you change file permissions and ownership in Unix?
distinguish between paging and swapping?
Unix Commands 
