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Matching white space through Grep

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# 1  
Old 11-14-2009
Matching white space through Grep
Hello All,

I am trying to match white space in patterns through - Grep

I tried [[:space:]] & [[:blank:]] but none of them worked.

Then I tried Perl extension '\s' and it worked.

So just wanted to know if [[:space:]] & [[:blank:]] are still supported or have they become deprecated.

However they have been mentioned in the man page so I guess I am not using it correctly. Any pointers on how to use them?
# 2  
Old 11-14-2009
They work fine in my grep. What pattern matching are you having trouble with?
# 3  
Old 11-14-2009
This worked for me.

cat myfile
this line has spaces.
this tab
thisnone


grep [[:space:]] myfile

this line has spaces.
this tab
# 4  
Old 11-14-2009
Ok got it fixed....

# cat /tmp/test.ldif

Quote:
dn: ou=71404558, ou=Company, ou=Personal, o=paragkalra.com
dn: ou=40208723, ou=Company, ou=Personal, o=paragkalra.com
dn: ou=63613012, ou=Company, ou=Personal, o=paragkalra.com
dn: ou=76884580, ou=Company, ou=Personal, o=paragkalra.com

As you can see there is space between 'dn:' and 'ou=' in all the lines

Initially I was placing '\*' after [[:space:]] as shown below:

Quote:
grep -i '^dn:[[:space:]]\*\(ou=[^,]\+,\)\{1\} ou=Company, ou=Personal, o=paragkalra.com' ous.ldif
Then I removed the black slash and it worked:

Quote:
grep -i '^dn:[[:space:]]*\(ou=[^,]\+,\)\{1\} ou=Company, ou=Personal, o=paragkalra.com' ous.ldif
Quote:
dn: ou=71404558, ou=Company, ou=Personal, o=paragkalra.com
dn: ou=40208723, ou=Company, ou=Personal, o=paragkalra.com
dn: ou=63613012, ou=Company, ou=Personal, o=paragkalra.com
dn: ou=76884580, ou=Company, ou=Personal, o=paragkalra.com
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