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Reading a text file using bash

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# 1  
Old 07-26-2013
Reading a text file using bash
I've a file in linux with following text:
Code:
;ip address    hostname     put-location      alt-put-location                tftpserver 
192.168.1.1    r01-lab1-net /mnt/nas1/fgbu/   /opt/fgbu/devicebackup          192.168.1.254

Now I want to read these values and assign them to particular variables for later user. e.g.,

Code:
ip_address=192.168.1.1
hostname=r01-lab1-net
put_location=/mnt/nas1/fgbu/

Now I am confused that what can be best way for it. for loop is not working as I'm not using array and also values start from 2nd line.
[MOD]Please use CODE tags; not HTML tags when posting sample input, output, and code.
Last edited by Don Cragun; 07-26-2013 at 04:47 PM.. Reason: HTML tags -> CODE tags
# 2  
Old 07-26-2013
You have lots of answers with examples of basic mechanisms how to parse a file in your other threads like https://www.unix.com/shell-programmin...lues-file.html
So what have you tried so far?
This User Gave Thanks to zaxxon For This Post:
Mahesh_RPM
# 3  
Old 07-26-2013
Code:
ip_address=$(awk 'NR==2 {print $1}' file.html)
hostname=$(awk 'NR==2 {print $2}' file.html)
put_location=$(awk 'NR==2 {print $3}' file.html)

This User Gave Thanks to Jotne For This Post:
kashif.live
# 4  
Old 07-26-2013
@Jotne: thank, this fullfil my initail requirement but when i have multiple lines then it doesn't work.

@zaxxon: requirement in this case is different than previous one. Now I 've values in columns. not in rows.

To be more precise. I've file of this formate:

Code:
;ip address    hostname     put-location      alt-put-location                tftpserver
192.168.1.1    r01-lab1-net /mnt/nas1/fgbu/   /opt/fgbu/devicebackup          192.168.1.254
192.168.1.2    r01-lab2-net /mnt/nas2/fgbu/   /opt/fgbu/backup                192.168.1.222

Now what i want is that:
Code:
read one line. 
set its values against different variable, 
do some operations using those variables (ip=192.168.1.1, hostname=r01-lab1-net etc)
move to next line
repeat above mentioned steps

so far, following code gives me each line.

Code:
sed 1d filename | while read  line
do
     echo line
done

but then i m unable to get different values from this line and assign them to variables. please let me know if this can work or there should be some other way. thanks.
Last edited by Don Cragun; 07-26-2013 at 04:48 PM.. Reason: HTML tags -> CODE tags
# 5  
Old 07-26-2013
You're making it too hard. Try something like:
Code:
#!/bin/bash
line=0
while read ip_address hostname put_location alt_put_location tftpserver
do      ((line++))
        # Skip header line.
        if [ $line -eq 1 ]
        then    continue
        fi
        # Process data from other lines.
        printf "Input line #%d:\n" $line
        printf "\tip address: %s\n" "$ip_address"
        printf "\thostname: %s\n" "$hostname"
        printf "\tput-location: %s\n" "$put_location"
        printf "\talt-put-locaiont: %s\n" "$alt_put_location"
        printf "\ttftpserver: %s\n" "$tftpserver"
done < filename

With the input you specified in your last post, this script produces:
Code:
Input line #2:
	ip address: 192.168.1.1
	hostname: r01-lab1-net
	put-location: /mnt/nas1/fgbu/
	alt-put-locaiont: /opt/fgbu/devicebackup
	tftpserver: 192.168.1.254
Input line #3:
	ip address: 192.168.1.2
	hostname: r01-lab2-net
	put-location: /mnt/nas2/fgbu/
	alt-put-locaiont: /opt/fgbu/backup
	tftpserver: 192.168.1.222

You specified bash; this script will also work with any other POSIX conforming shell.
# 6  
Old 07-26-2013
@kashif.live:
We want to have users evolve and try to learn, not overly get their jobs done by others. That's why we ask for. That it isn't the exact solution in your other threads is quite clear.
Also start using code tags, not html tags when you post code, data or logs etc.
# 7  
Old 07-26-2013
ok guys. thanks alot. got answer:

Code:
sed 1d filename | while read -a words
do

ip_address="${words[0]}"
echo $ip_address
hostName="${words[1]}"
echo $hostName
pLocation="${words[2]}"
echo $pLocation
apLocation="${words[3]}"
echo $apLocation
tftpserver="${words[4]}"
echo $tftpserver


done

@zaxxon: I hope I've learned now. Smilie
Last edited by kashif.live; 07-26-2013 at 05:26 PM..
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