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Full Discussion: Regex question
Top Forums Shell Programming and Scripting Regex question Post 303024036 by boncuk on Thursday 27th of September 2018 10:08:44 AM
Old 09-27-2018
sorry the browswer not putting code tags around the code when I click on button , so I am adding them manually hope it works.
can someone help me on my sed command please?

I am using sun solaris and Linux , what I want is SED to print any string (or output it to a file preferably) that does not have either "01","03","05","07","10" or "11" on the 9th and 10th position .
e.g from the file below I only want these three lines


Code:
433483433339
167710001710
167730600000


Code:
$cat a.txt
 000000001000
 433483433339 <<< print this since 33 is at 9th and 10th pos
 121121211100 
 167710001710 <<< print this since 17 is at 9th and 10th pos
 167735250310
 167735260510
 167735280710
 167730600000 <<< print this since 00 is at 9th and 10th pos

------ Post updated at 10:07 AM ------

Quote:
Originally Posted by Don Cragun
Just using standard sed features and avoiding cases where systems allowing EREs or BREs make a difference, both of the following seem to also do what you want:
Code:
sed -e '/^........0[1357]/d' -e '/^........1[01]/d' a.txt

and:
Code:
sed '/^........0[1357]/d;/^........1[01]/d' a.txt

But, I have no experience with openVMS, so I can't say whether or not either of these will work there.


awesome this one worked

------ Post updated at 10:08 AM ------

how does this command works though .. I understand each parts but how the output of one gets piped to the other?


Code:
sed -e '/^........0[1357]/d' -e '/^........1[01]/d' a.txt

 

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GAPPLETVIEWER(1)                                                        GNU                                                       GAPPLETVIEWER(1)

NAME

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0.98                                                                2010-07-05                                                    GAPPLETVIEWER(1)
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