Shell Programming and Scripting

Dear experts,

i want to search pattern tre and copy this line and above two lines
in a seperate file::

Thanks for the help

SEV="MAJOR": RX-TX [10] HW-FAILURE [239] DOMAIN="alcomc2_BSS_20
unit-type % bts nbr % 24
SBL-type % tre nbr % 4 subnb % 255


BR,
Danish

Code:

grep -B2 'tre' file

Regards

Dear Fellow,

Thank you very much for the reply,

This line didn't produce anything, i am using solaris 10.

i use it like this grep -B2 'tre' temp.txt > output.txt
temp.txt contains lots of alarms like this.

I want to search pattern tre and copy this line and above two lines in seperate file, and tre is present many times.


Thank a lot.

Hi,

Try this ...

for i in `grep tre My.log`
do
strow=`expr $i - 2`
myline=`echo "sed -n ""${strow}p"" My.log"`
done > MyNew.log

You probably want grep -n in order for that to work.

BOSS!!!

I am getting below mentioned error message with this code
for i in `grep tre My.log`
do
strow=`expr $i - 2`
myline=`echo "sed -n ""${strow}p"" My.log"`
done > MyNew.log

Dear ERA, can you please tell me how to grep tre and above two lines with grep -n command, also i have a lot of tre pattern in this file.

Thanks in advance for all you help..
I need a little more


===========================ERROR======================
++ for i in '`grep tre help.txt`'
+++ expr SBL-type - 2
expr: non-numeric argument
++ strow=
+++ echo 'sed -n p help.txt'
++ myline='sed -n p help.txt'
++ for i in '`grep tre help.txt`'
+++ expr % - 2
expr: syntax error
++ strow=
+++ echo 'sed -n p help.txt'
++ myline='sed -n p help.txt'
++ for i in '`grep tre help.txt`'
+++ expr tre - 2
expr: non-numeric argument
++ strow=
+++ echo 'sed -n p help.txt'
++ myline='sed -n p help.txt'
++ for i in '`grep tre help.txt`'
+++ expr nbr - 2
expr: non-numeric argument

Hi Danish,

Era already mentioned it use "grep -n tre ..." instead of "grep tre ..."