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Find a pattern in a single line

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# 1  
Old 09-03-2009
Find a pattern in a single line
Hi

I have to find if a pattern is present in a line.
eq
Code:
line="dasdasd hello asdasdasd"

Have to find if "hello" is present in the line or not.
Which command to be used?

Thanks
# 2  
Old 09-03-2009
Quote:
Originally Posted by akashtcs
Hi

I have to find if a pattern is present in a line.
eq
Code:
line="dasdasd hello asdasdasd"

Have to find if "hello" is present in the line or not.
Which command to be used?

Thanks
Use grep, check the man page.

Regards
# 3  
Old 09-03-2009
Grep will search the full file.I want to search only 1 line.

Can grep be used without giving the file name and just giving the variable which has a line stored in it?
i searched but could not find.
# 4  
Old 09-03-2009
Quote:
Originally Posted by akashtcs
Grep will search the full file.I want to search only 1 line.

Can grep be used without giving the file name and just giving the variable which has a line stored in it?
i searched but could not find.
Code:
echo "$variable" | grep <something>

# 5  
Old 09-03-2009
ok thanks...
But this will return the whole line.How do we implement in a if condition?
Code:
if [ pattern is matching in the variable ]
then
do something
fi

# 6  
Old 09-03-2009
something like this :

Code:
var="rama raja roha"

if [ `echo "$var" | awk '$0 ~/rama1/ {print 1}'` ]
then
echo "sucess"
else
echo "failure"
fi

# 7  
Old 09-03-2009
How to implement it if we have to search patten with a space in between?
If we have to search for "rama raja" in the line "rama raja roha".
This is not working.
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