Login or Register to Ask a Question and Join Our Community

formatting a file headache

Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers formatting a file headache
# 1  
Old 02-16-2007
formatting a file headache

Hello does anyone know how to do the following using some simple unix if possible:

I have a file with the following info as comma separated. It shows username, id number and all the subjects they are enrolled in on the one line. The subjects are separated by colons.


I need it to have just one course per user line per user. So that it would look like:


Does anyone have any ideas? I'm pulling my hair out!
# 2  
Old 02-16-2007
Originally Posted by ynneycat
Does anyone have any ideas? I'm pulling my hair out!
Why do you have to? Smilie

sed 's/\(.*\),\(.*\),\(.*\):\(.*\)/\1,\2,\3\
\1,\2,\4/' filename

The enter mark after "\3\" is mandatory
# 3  
Old 02-16-2007
Wow! This rocks.
That seems to work. Unbelievable.

The actual file may have anywhere from 1 to 10 or more colon separated subjects per user. Do you think it will still work Ok?

I guess I'm wondering if the \1,\2,\3 are looking for a specific number of entries in the last field.

As you can see I'm a newbie and have only used sed for the most basic of find and replaces.

# 4  
Old 02-16-2007
Not a problem!

Could you please post some examples, where you think it wont work ? Smilie

That would be helpful to find !
# 5  
Old 02-16-2007
Thanks - Yes, probably should have been really specific
The file I'm working with will have hundreds of lines. The first few lines basically like this (incl headers)

The end of each line always has 6 commas, but before the 6 commas are the subjects each user is enrolled in. There may actually be twenty or more subjects.

It looks like the initial sed you suggested only works if there are two subjects per line. In my real file, the exact number of subjects per line is unpredictable.

User Name,Password,ID,First Name,Last Name,Subject,Other,#User Type,City,#Email,#Some Field,#Another Field
# 6  
Old 02-16-2007
awk -F"," ' { 
for( i = 2 ; i <= NF - 7 ; ++i )
	str=str "," $i
for( i = 1 ; i <= n ; ++i )
	print str "," arr[n]
} ' file

# 7  
Old 02-16-2007
Untested, but conceptually very similar to the previous post:

awk -F '[,:]' '{ for ( i=7, i <= NF i++) { printf "%s,%s,%s\n", $1, $2, $i } }

On Solaris you will need to use nawk instead of awk.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Beginner: script headache

Hi, I am new to shell scripting, but doing my best to learn things. Today doing courses there was exercise like this: #!/usr/bin/bash a=$1 b=$2 if ] then echo "Conditions are met" else echo "Conditions are not met" fi I improved it a little, beacuse of curiosity :D to this: ... (8 Replies)
Discussion started by: Rosentine
8 Replies

2. Shell Programming and Scripting

Formatting file data to another file (control character related)

I have to write a program to read data from files and then format into another file. However, I face a strange problem related to control character that I can't understand and solve. The source file is compose of many lines with such format: T_NAME|P_NAME|P_CODE|DOCUMENT_PATH|REG_DATE ... (3 Replies)
Discussion started by: hk6279
3 Replies

3. UNIX for Advanced & Expert Users

ssh command headache

Good day, I am trying to run a ssh command on a remote server, but when I run the command the server takes FOREVER... and ends up giving me an error.. then the script also kicks server load up by 100% while it is running.. But if I run the same command on the server it goes pretty quickly and... (3 Replies)
Discussion started by: msullivan
3 Replies

4. Shell Programming and Scripting

Friday afternoon headache

Hi all, It's been a long week and my brain is clearly not functioning right so hopefully someone can help me out here. I've got a function in a script which just checks if a MySQL database directory exists or not. Code is as follows: dbCheck2() { if ; then { : # carry... (4 Replies)
Discussion started by: _Spare_Ribs_
4 Replies

5. Shell Programming and Scripting

scripting headache... loops & variables

Surely there's an easier way to do this, lets see if anyone knows! I am new to scripting so go easy on me! I have the following script and at the moment it doesn't work and I believe the problem is that I am using a while loop within a while loop. When I run the script using sh -x I can see... (6 Replies)
Discussion started by: StevePace
6 Replies

6. UNIX for Dummies Questions & Answers

sed headache

Hi all, I've got a thorny sed/regex problem and I thought somebody out there might be able to help. I'd like to use sed in a Makefile to parse a path string. The path might look like this: case 1: /mnt/users/bob/build/src or case 2: /mnt/users/bob/build/src/foo or case 3: ... (4 Replies)
Discussion started by: gnarl
4 Replies

7. Shell Programming and Scripting

sed make me headache... need help!

I've still a little problem with sed. So, the content of my file.txt is like: > > > > tpo68-96-22-1.no.no.cox.net.4391: >... (5 Replies)
Discussion started by: nymus7
5 Replies

8. Solaris

A very headache problem

guys, need your help~~~~ I am setting up a Sun Enterprise 450 Ultra 4 server originally I was using Sun solaris 9 1202 version. but after an accident (i guess becoz i deleted something wrongly), the system cannot boot up. and now I wana install a FreeBSD(since it is free and it will... (3 Replies)
Discussion started by: MrDJay
3 Replies

9. IP Networking

DHCP client & ipchains headache

Hi all, I upgraded my SUSE 6.1 to SUSE 7.1 and at once the following things won't work anymore: 1) My DHCP client is not able anymore to retrieve my IP address from the @home server. It times out all the time. If I use a fixed IP I can get on the net, so there is no physical problem. 2) I... (3 Replies)
Discussion started by: Micky
3 Replies

10. UNIX for Dummies Questions & Answers

extremely headache

I need to execute command at remote host from my program. there is rs6000/aix standard command called rexec. unfortunately rexec ask username and password which must supplied interactively, of course it is impossible runned by program. So I have to change rexec command format to make user-name... (5 Replies)
Discussion started by: yatno
5 Replies
Login or Register to Ask a Question

Featured Tech Videos