Scripting: How to cut character string from file ?

[TSch]

Hi folks,

I'm trying to write a little script that's supposed to work with a certain value contained in a specific file. The File is always the same, only the value I need changes.

It looks something like that:

free space : 61.45 Percent

In order to work with that value I need to cut out the rest somehow and only write the value into a new output file.

e.g.:

I'd like to cut out

"free space : "

and

" Percent"

so that only

61.45

and is written into a new file.

How can I do this ?

Thanks in advance !

Regards,
Thomas

 

[alexhu]

not elegant but it works

grep free <your_file> | tr -s ' ' ' ' | cut -f4 -d" "

to write to a new file assign it to a variable and echo the variable to the new file

VALUE=`grep free <your_file> | tr -s ' ' ' ' | cut -f4 -d" "`

echo $VALUE > new_file

Alex

 

[KenCunningham]

Or just:

grep free <your_file> | tr -s ' ' ' ' | cut -f4 -d" " > new_file

 

[sbix]

Something like:
cat your_file |awk '{for (i=1;i<=NF;i++){if ( $i ~ /[0-9] ) {print $i}}}'

 

[Yegolev]

am i missing something? why would this not work?

awk '{print$4}' filename

IBM Certified -- AIX 4.3 Obfuscation

 

[screwloose]

I ditto what Yegolev suggests.