UNIX for Dummies Questions & Answers

Hello Unix gurus,
I am new to Unix. I am working on some dummy project which involves unix scripting.

I have a query :

There is a file Number.dat which is of form say

AAA|123|4563|animal
AAA|1234|45634|animal2
BBB|123444|456312|bird
BBB|123445|456313|bird2

Here AAA,BBB are headers.
Now I want to sort Number.dat based on header and place them in different header.dat file.
How do I do that? I would be really greatful if some one helps me.


Thanks in advance
Vinay

What have you done to attempt to solve this problem yourself?
Post your sample script, and we'll see how we can assist.

Regards

using awk we can get the solution for your problem


if $1 ='AAA' we can redirect it into new file AAA.dat
and if $1 ='BBB' we can redirect it into new file BBB.dat


please use this way to get the solutions

Regards,
Siva.P
Bangalore

Hello Franklin / Unix gurus,

My script is as follows:


#!/bin/ksh
sys=/export/home/vinay/Number.data
mod1=AAA
mod2=BBB

grep -h 'AAA' $sys > /export/home/vinay/AAA_$mod1.data
grep -h 'BBB' $sys > /export/home/vinay/BBB_$mod2.data


But I am not happy with the script since it has to traverse twice imto the Number.dat file


Also I some questions,

I want the process to use the Number.dat once rather than traversing twice.
Also, say if memory is full while script is running, then how should I handle it.
Kindly reply back if any one has a suggestion/script/solution

Thanks in advance.

Regards,
Vinay

Both awk and sed have facilities for writing into multiple files as they read in a single pass down the file. psiva_arul is hinting in the same direction in the posting above.

hello era /Unix gurus,
If you don't mind, can you assist in which fashion I can make use of sed into my script.

Thanks and Regards,
Vinay

Googling is not an option?

Code:

sed -n '/^AAA/wAAA.dat
/^BBB/wBBB.dat' file

Notice that writing doesn't have any side effect (such as, for example, finish this line and fetch the next) so if you have patterns which overlap, you can get the same line written to multiple files (or need to write a slightly more complex script).