UNIX for Dummies Questions & Answers

Hi!

Trying to find string and then put the above Headers of corresponding fist line.

After executing a Property command a get this output:

SP/CH-CH Span Name Type TG Idle InUse OffHk OnHk Ring
-------- ------------------------------ ------ ---- ----- ----- -----
02/01-24 CARRIERSS7 505 2 22 0 0 0 1-24 12
04/01-24 CARRIERSS7 505 2 22 0 0 0 49-72 12
CH TRGP CIC Bearer BLoc-Rem CH TRGP CIC Bearer BLoc-Rem CH
-- ---- ----- -------- -------- -- ---- ----- -------- -------- -- ----
04 0 76 CARRIERISDN2511Reset H 11 505 83 Reset H 18 505 90 Reset H
05 0 77 CARRIERISDN2511Reset H 12 505 84 Reset H 19 505 91 Reset H
07 505 79 CARRIERISDN2511Reset H 14 505 86 Reset H 21 505 93 Reset H
08/01-24 CARRIERISDN2511 SS7CH TRGP CIC Bearer BLoc-Rem CH TRGP CIC
-- ---- ----- -------- -------- -- ---- ----- -------- -------- -- ----
01 511 97 Idle H M 09 511 105 Reset H 17 511 113 Reset H
02 511 98 Reset H 10 511 106 Reset H 18 511 114 Reset H


i excute a grep with in this way to filter:

Code:

 command  | grep CARRIERSS7

and get this output:

02/01-24 CARRIERSS7 505 2 22 0 0 0 1-24 12
04/01-24 CARRIERSS7 505 2 22 0 0 0 49-72 12

then i neet to bring the header above the first output line no matter whats the result.

i was thinking to store the output in a variable and then excute a second grep to find the hear and then merge in one file all together like this:

SP/CH-CH Span Name Type TG Idle InUse OffHk OnHk Ring
-------- ------------------------------ ------ ---- ----- ----- -----
02/01-24 CARRIERSS7 505 2 22 0 0 0 1-24 12
04/01-24 CARRIERSS7 505 2 22 0 0 0 49-72 12

thanx for all

use awk...

Code:

command|awk 'BEGIN{print "SP/CH-CH Span Name Type TG Idle InUse OffHk OnHk Ring\n-------- ------------------------------ ------ ---- ----- ----- ----- "}/CARRIERSS7/{print}'

The header is always in the first (or first two, if you want to include the separator) line(s) and there is a special command for printing the first <n> lines of a data stream: "head -<n> ". So you could get your desired output with two commands:

Code:

head -2 <file>
grep "<your-filter>" <file>

Still, this is a invocation of two separate commands and it will be more performant if you could combine it to one command. Actually "sed" is able to do this:

Code:

sed -n '1,2p;/<your_filter>/p' <file>

The second variant has the additional advantage of being fit to be used in a pipeline, whereas in the first variant you would have to deal with "tee" to create several output streams for the different tools:

Code:

process_creating_output | sed -n '1,2p;/<your_filter>/p'

I hope this helps.

bakunin

Hi all.
Sorry for the late...

Thank you!!! i'll try all of your post!

---------- Post updated at 07:41 PM ---------- Previous update was at 06:43 PM ----------

the command sed works pertectly !!!

tx!!!

I don't think there is any problem with awk.. its also working fine...
did you tried???

No, there is not. but with sed have not to write the whole header...but thanx, now i know two way to do this, thanx you guys!!!

With awk you can do something like:

Code:

awk 'NR<3{print} /CARRIERSS7/' file