regular exp.

monu · 11-17-2007, 06:37 PM

Hi,

I am working on script which can ignore Case sensitivity. suppose if user enter Linux or LINUX, scripr should accept both ways.

I use:
grep -i "[linux]"
grep -i "[LINUX]"

its not working. My script is not accepting Linux. its not accepting small letters linux.

can anyone help me?

thanks

PAix · 11-17-2007, 07:00 PM

Code:

 grep -i "\[linux\]" filenametosearch

Your square brackets need to be escaped and then I am sure that it will work. The filename/s to search go after the pattern to search for of course.

.

It will happily find [linux], [LINUX], [LiNuX] etc.
PAix

monu · 11-17-2007, 07:41 PM

Quote:

Originally Posted by PAix

Code:

 grep -i "\[linux\]" filenametosearch

Your square brackets need to be escaped and then I am sure that it will work. The filename/s to search go after the pattern to search for of course.

.

It will happily find [linux], [LINUX], [LiNuX] etc.
PAix

nope. not working
thanks anyways

monu · 11-17-2007, 07:48 PM

here is my code:

li=`echo $userinput | grep -i "\[linux\]"`

can anyone can help this?

chrism01 · 11-17-2007, 08:04 PM

why the square brackets?
in=`echo $input|grep -i linux`
if [[ $? -eq 0 ]]
then
echo "match"
fi

PAix · 11-17-2007, 08:57 PM

I sidelined myself and assumed he was wanting a match of linux LINUX etc with square brackets - it must be getting late.

chrism01 · 11-17-2007, 09:14 PM

In the UK def late. Lunchtime here

monu · 11-18-2007, 01:04 AM

Quote:

Originally Posted by chrism01

why the square brackets?
in=`echo $input|grep -i linux`
if [[ $? -eq 0 ]]
then
echo "match"
fi

good work! thanks for your help!

PAix · 11-18-2007, 08:35 AM

Chrism01,
Def late= > 3.30am UK local time, well after supper and too long before breakfast - not a bad time to consider sleeping.

PAix

monu · 11-18-2007, 04:20 PM

Quote:

Originally Posted by chrism01

why the square brackets?
in=`echo $input|grep -i linux`
if [[ $? -eq 0 ]]
then
echo "match"
fi

Hi

what happen if i want to check two arguments?

in=`echo $input|grep -i linux`
in=`echo $input|grep -i fedora`
if [[ $? -eq 0 ]]
then
echo "match"
fi

its not working at all.

thanks

chrism01 · 11-19-2007, 01:19 AM

$? is the status of the last run cmd, so you'd have to check each grep separately.
Perhaps you could expand on why you are doing this?

Disillusionist · 11-19-2007, 01:53 AM

Quote:

Originally Posted by monu

Hi

what happen if i want to check two arguments?

in=`echo $input|grep -i linux`
in=`echo $input|grep -i fedora`
if [[ $? -eq 0 ]]
then
echo "match"
fi

its not working at all.

thanks

If you want to check that $input includes both "linux" and "fedora" :

Code:

echo $input|grep -i linux|grep -i fedora

If you want to check that $input includes either "linux" or "fedora" :

Code:

echo $input|egrep -i "linux|fedora"