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Multi line grep using sed and specifying open/close tags

Working with log files that contains variable length messages wrapped between open and close tags it may be useful to filter the messages upon a keyword. This works fine with GNU sed version 4.2 or higher, so pay attention to some unix distros (solaris, hp-ux, etc.). Linux should be ok. Show Sample Output
This is sample output - yours may be different.
```
The command:
cat file.txt | sed -e /^$/d -e /++-/G | sed -e '/./{H;$!d;}' -e 'x;/Lorem/!d;'

Will print the message:

^$
Lorem ipsum dolor sit amet,
consectetur adipiscing elit.
++-

But not:

^$
Vestibulum fermentum molestie nunc a interdum.
++-
```
2

cat file.txt | sed -e /<opening tag>/d -e /<closing tag>/G | sed -e '/./{H;$!d;}' -e 'x;/<string to search>/!d;'

ebah80 · 2010-11-04 10:31:15 6
Multi line grep using sed and specifying open/close tags

This line does not include your closing tag in the output. Show Sample Output
This is sample output - yours may be different.
```
daveqb@localhost /tmp $
cat test
one two three
four
five
six
seven

daveqb@localhost /tmp $
sed '/'"four"'/,/'"six"'/{/'"six"'/d;p};d' "test"
four
five
```
1

sed '/'"<opening tag>"'/,/'"<closing tag>"'/{/'"<closing tag>"'/d;p};d' "<file>"

DaveQB · 2010-11-08 21:43:00 5

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When some console full-screen program (minicom, vi, some installers) breaks down your terminal, try this command to revert all options to "sane" settings (sane is a built-in combo of a lot of stty options)

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Shorter version.

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Lists all listening ports together with the PID of the associated process

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