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grep a line from file?

 
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# 1  
Old 02-28-2013
grep a line from file?
hello,
i am trying to grep and the show lines from file that starts with *

example of file:

* bobo: dsfdf,sdfsd,sdfsdf
-------------------------------

gogo: sdf,sdfsdf,sdfsdf,sdfsdf
---------------------------------

* bobo2: sdfsdf,sdfsdf,sdfsdf
-----------------------------------

sdfsdf : sdfsd,sdfsdf,sdfsdf
--------------------------------
# 2  
Old 02-28-2013
Try this

Code:
grep '*' file.txt

# 3  
Old 02-28-2013
Quote:
Originally Posted by Vikram_Tanwar12
Try this

Code:
grep '*' file.txt

To be more precise for required output.

Code:
grep '^*' file

# 4  
Old 03-04-2013
What speaks against the correct REGEX
Code:
grep '^\*' file

?
# 5  
Old 03-06-2013
Another way to not have to worry about * as regular expression:
Code:
grep '^[*]' file

# 6  
Old 03-06-2013
Quote:
Originally Posted by MadeInGermany
What speaks against the correct REGEX
Code:
grep '^\*' file

?
That should not be necessary:

Code:
*
    The <asterisk> shall be special except when used:

        In a bracket expression

        As the first character of an entire BRE (after an initial '^' , if any)

        As the first character of a subexpression (after an initial '^' , if any); see BREs Matching Multiple Characters

BRE Special Characters

Note the this applies to BRE not ERE. With ERE the asterisk would need to be escaped or placed in a bracket expression..:

grep '^*' vs. grep -E '^\*'
Last edited by Scrutinizer; 03-06-2013 at 04:40 AM..
 
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