Print lines between patterns

Source: www.shellhacks.com/en/Using-SED-and-AWK-to-Print-Lines-Between-Two-Patterns+&cd=5&hl=en&ct=clnk&gl=us

File:

I Love Linux 
***** BEGIN ***** 
BASH is awesome 
BASH is awesome 
***** END ***** 
I Love Linux

• sed 

Syntax :

sed -n '/StartPattern/,/EndPattern/p' FileName  <<<---inclusive both

Option	Description
-n, --quiet, --silent	Suppress automatic printing of pattern space
p	Print the current pattern space

Example :

sed -n '/BEGIN/,/END/p' info.txt 

***** BEGIN *****
BASH is awesome
BASH is awesome
***** END *****

•  awk

Syntax :

awk '/StartPattern/,/EndPattern/' FileName

Example :

awk '/BEGIN/,/END/' info.txt

***** BEGIN *****
BASH is awesome
BASH is awesome
***** END ***** 

Another VERY Cool snipet:

source: 
http://stackoverflow.com/questions/9476018/split-text-file-into-parts-based-on-a-pattern-taken-from-the-text-file 

BEGIN { fn=0 }
NR==1 { next }
NR==2 { delim=$1 }
$1 == delim {
    f=sprintf("test%02d.txt",fn++);
    print "Creating " f
}

{ print $0 > f }

1. initialize output file number
2. ignore the first line
3. extract the delimiter from the second line
4. for every input line whose first token matches the delimiter, set up the output file name
5. for all lines, write to the current output file

---------------------------------------- another ex:

* file: TEST_TAF PREF: RAC1 RAC2 RAC3 ...... AVAIL: RAC4  (PREF, AVAIL)

   >  sed 's/.*PREF//;s/AVAIL.*//' yourfile

   >  sed 's/.*PREF: //;s/ AVAIL.*//;s/  */,/g' yourfile

* https://nixtip.wordpress.com/2010/10/12/print-lines-between-two-patterns-the-awk-way/

file: 

test -3

test -2

test -1

OUTPUT

top 2

bottom 1

left 0

right 0

page 66

END

test 1

test 2

test 3

> awk '/OUTPUT/ {flag=1;next} /END/{flag=0} flag {print}'

-------------------------- Another Ex: starting with multiple patterns

sed -n '/\(12:05:43.376\|Begin FS_BP.Init.*Init.OnExecute\)/,/12:05:43.605/p'  AE_FS_BP_2740745.trc 

More examples ------ https://stackoverflow.com/questions/18185771/extract-nth-line-after-matching-pattern

To extract the Nth line after a matching pattern you want:

awk 'c&&!--c;/pattern/{c=N}' file

e.g.

awk 'c&&!--c;/Revision:/{c=5}' file

would print the 5th line after the text "Revision:"/.

FYI the following idioms describe how to select a range of records given a specific pattern to match:

a) Print all records from some pattern:

awk '/pattern/{f=1}f' file

b) Print all records after some pattern:

awk 'f;/pattern/{f=1}' file

c) Print the Nth record after some pattern:

awk 'c&&!--c;/pattern/{c=N}' file

d) Print every record except the Nth record after some pattern:

awk 'c&&!--c{next}/pattern/{c=N}1' file

e) Print the N records after some pattern:

awk 'c&&c--;/pattern/{c=N}' file

f) Print every record except the N records after some pattern:

awk 'c&&c--{next}/pattern/{c=N}1' file

g) Print the N records from some pattern:

awk '/pattern/{c=N}c&&c--' file

I changed the variable name from "f" for "found" to "c" for "count" where appropriate as that's more expressive of what the variable actually IS.