How to filter different files from one file

Let as say I want different files starting from "process" till next "process. For example Input file

Process=0
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Process=1
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Process=2
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Expected output File_0 should contain

Process=0
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File_1 should contain

Process=1
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File_2 should contain

Process=2
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This creates the files for each section and outputs the text to them. If there is text before the first "Process" then it is put in a file called "Preamble".

awk -F '[ =]' 'BEGIN {file="Preamble"} {if ($1 == "Process") file="File_"$2; print >> file}' inputfile

Look at the csplit command in Linux. It splits text files at delimiters (which may be defined by a regular expression).

use gawk/nawk(Solaris)

gawk -F"=" '/Process/{f=1;n=$2;print $0 > "File_"n;next}
f && /Process/{f=0} 
f&&NF{print $0 > "File_"n}
' file