Re: Help for Unix text file processing

Here are some sed commands that do what you want -- in the [] brackets, there is a space and a tab.

$ cat removeblanks.sed

/^[     ]*$/d
s/^[    ]*//
s/[     ]*$//

Here's a test file.
$ cat test.txt

This is a real line, the lines above are a carriage return, a tab and spaces.

                This line starts and ends with tabs.
  This line starts and ends with spaces
        This line starts and ends with spaces and tabs

Here's what you run:
$ sed -f removeblanks.sed test.txt
This is a real line, the lines above are a carriage return, a tab and spaces.
This line starts and ends with tabs.
This line starts and ends with spaces
This line starts and ends with spaces and tabs

HTH! Diana Duncan
TITAN Technology Partners
One Copley Parkway, Ste 540
Morrisville, NC 27560
VM: 919.466.7337 x 316
F: 919.466.7427
E: Diana_Duncan_at_ttpartners.com

                                                                                       
                                 
                    "Kumar,                                                            
                                 
                    Dharminder"               To:     Multiple recipients of list 
ORACLE-L <ORACLE-L_at_fatcity.com>       
                    <Dharminder.Kumar@        cc:                                      
                                 
                    bmonb.com>                Fax to:                                  
                                 
                    Sent by:                  Subject:     Help for Unix text file 
processing                           
                    root_at_fatcity.com                                                   
                                 
                                                                                       
                                 
                                                                                       
                                 
                    06/06/2001 10:55                                                   
                                 
                    AM                                                                 
                                 
                    Please respond to                                                  
                                 
                    ORACLE-L                                                           
                                 
                                                                                       
                                 
                                                                                       
                                 

> Hey all,
>
> I am looking for some commands like ( grep, egrep, sed etc) to do the
> following on a Unix box.
>
> 1. Command to take out all the blank line from a text file. The blank
line
> may include tabs and whitespaces.
> 2. Command to take out the trailing and starting blanks and tabs from the
> each line of the text file.
> 3. Command for the above two tasks combined.
>
> Thanks in advance.
>
> Dharminder Kumar
>
>
>
>

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  INET: Diana_Duncan_at_ttpartners.com

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