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Old 08-26-2006, 02:55 PM   #1
ozymandias
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How to read data from file to use in shell script?


I'm trying to create a shell script that makes use of a data file with text on individual lines. I want the script to read the first line of the data file, then the second line etc. etc.
I can't seem to find out which command to use - sorry if this is a simple one!
I have tried a few man pages but if you don't know which command you're looking for it's difficult to work backwards!
Cheers,

Oz
 
Old 08-26-2006, 03:28 PM   #2
jp-lack
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just to read the content of the file and echo them

Code:
#!/bin/sh
var=`cat file`
for i in $var; do
        echo $i
done
of course that you should verify if the file exist and bla bla bla
 
Old 08-26-2006, 03:33 PM   #3
ozymandias
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aha! Thanks
 
Old 10-27-2006, 11:05 AM   #4
Fredde87
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may I hijack the thread and ask how to make it seperate the lines instead of the words? The above code will print every word and not sentences, so a file containing,

this is a test line
this is another test line

will return:
this
is
a
test
line
this
is
another
test
line

when I want a specified sentence (like line 2) to be placed in a variable.


Edit: I thought I knew SED pretty well, but I had never knew you could do it there. Here is an example if someone else needs it. LINE2="`sed -n '2p'file-location`"

Last edited by Fredde87; 10-27-2006 at 11:16 AM.
 
Old 10-27-2006, 12:47 PM   #5
pixellany
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If I remember correctly, awk reads one line at a time.
 
Old 10-27-2006, 12:58 PM   #6
Dragineez
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Correct

Quote:
Originally Posted by pixellany
If I remember correctly, awk reads one line at a time.
You beat me to it!
 
Old 10-27-2006, 01:04 PM   #7
pixellany
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Quote:
Originally Posted by Fredde87
Edit: I thought I knew SED pretty well, but I had never knew you could do it there. Here is an example if someone else needs it. LINE2="`sed -n '2p'file-location`"
Need a space before file
The quotes are not needed, since the "`" makes a container

Thus: LINE2=`sed -n '2p' file-location`
Yes, sed is cool....
 
Old 10-27-2006, 01:19 PM   #8
pixellany
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Quote:
Originally Posted by Dragineez
You beat me to it!
My motorcycle is faster...
 
  


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