one liner to search a file

[h3r0]

hi

i need to search a file which contains the data below and extract the
machine name only in this case 'e215c03' and overwrite the file.

many thanks for your help.


Name: e215c03.internal.co.uk
Address: 10.40.10.15

 

[Ian Wilson]

hi

i need to search a file which contains the data below and extract the
machine name only in this case 'e215c03' and overwrite the file.

many thanks for your help.


Name: e215c03.internal.co.uk
Address: 10.40.10.15

perl -n -i -e '/^Name:\s+([^\.]+)/ && print $1' filename

 

[h3r0]

it wanted a backup file name, works great your a star!
thanks for your fast responses.

hi

i need to search a file which contains the data below and extract the
machine name only in this case 'e215c03' and overwrite the file.

many thanks for your help.


Name: e215c03.internal.co.uk
Address: 10.40.10.15

perl -n -i -e '/^Name:\s+([^\.]+)/ && print $1' filename

 

[axel]

it wanted a backup file name, works great your a star!
thanks for your fast responses.

hi

i need to search a file which contains the data below and extract the
machine name only in this case 'e215c03' and overwrite the file.

many thanks for your help.


Name: e215c03.internal.co.uk
Address: 10.40.10.15

perl -n -i -e '/^Name:\s+([^\.]+)/ && print $1' filename

 

[axel]

perl -n -i -e '/^Name:\s+([^\.]+)/ && print $1' filename

^
|
What purpose does the backslash serve?

Axel

 

[MrPenguin]

i need to search a file which contains the data below and extract the
machine name only in this case 'e215c03' and overwrite the file.

Name: e215c03.internal.co.uk
Address: 10.40.10.15

perl -n -i -e '/^Name:\s+([^\.]+)/ && print $1' filename

^
|
What purpose does the backslash serve?

Axel

to escape the dot. If not the dot is a regex symbol.

 

[Arne Ruhnau]

perl -n -i -e '/^Name:\s+([^\.]+)/ && print $1' filename

^ |
What purpose does the backslash serve?

to escape the dot. If not the dot is a regex symbol.

No, it is inside a character class and thus an ordinary dot.<- like this

Arne Ruhnau

 

[Rick Measham]

perl -n -i -e '/^Name:\s+([^\.]+)/ && print $1' filename

Its an indication that we really do mean a dot here and not an
'any-character'. Inside a character class, a dot is a dot. Anywhere else
and it has a special meaning. Now when it's preceeded by a backslash in
a character class it takes on no special meaning. The backslash is (from
an execution POV) redundant. However when someone else comes along and
reads your code later, they see that you really *did* mean a dot because
you backslashed it.

It's for the programmer, not the interpreter.

Cheers!
Rick Measham