Grep and delete lines except the lines with strings

vj8436 · #1 (**permalink**) 12-16-2008

Hi

I am writing a script which should read a file and search for certain strings 'approved' or 'removed' and retain only those lines that contain the above strings.

Ex: file name 'test'
test:

Code:

approved package
waiting for approval package
disapproved package
removed package
approved package
approved package

Here i need to delete all the lines except those that contain either 'approved' or 'removed'.

How can i do that.

SFNYC · #2 (**permalink**) 12-16-2008

Code:

$ cat test
approved package
waiting for approval package
disapproved package
removed package
approved package
approved package

$ egrep -E 'approved|removed' test
approved package
disapproved package
removed package
approved package
approved package

vj8436 · #3 (**permalink**) 12-16-2008

Thank you ... but i have two problems

1) egrep -E does not work. it returns 'Invalid options'

2) as per the above command 'disapproved' is not removed from file
i want that line also to be removed with 'removed' or 'approved' string option.

Yogesh Sawant · #4 (**permalink**) 12-16-2008

using sed:

Code:

 sed -i -nl -e '/\<approved\>\|\<removed\>/ {p;} ' test

Yogesh Sawant · #5 (**permalink**) 12-16-2008

Quote:

Originally Posted by vj8436

as per the above command 'disapproved' is not removed from file
i want that line also to be removed with 'removed' or 'approved' string option.

what you need is word boundaries:

Code:

 egrep -E '\<approved\>|\<removed\>' test

vgersh99 · #6 (**permalink**) 12-16-2008

YMMV:

Code:

egrep '^(approved|removed)' test

vj8436 · #7 (**permalink**) 12-16-2008

sir,

i get the reply as

Code:

sed: illegal option -- i

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