Shell Programming and Scripting

I have a file with some IPs, and i want to add some tags to them using awk. The file will contain any number of IPs, and what i want is to add tags to all of them. For example:

original.txt
172.17.110.24
132.15.12.34
.....

what i want to get is

<device> 172.17.110.24 </device>
<device> 132.15.12.34 </device>
<device>.... </device>

I know that is a stupid question, but i couldn't find any similar examples.
Thanks in advance

Code:

awk '{print "<device> " $0 " </device>"}' original.txt

Given your sample data a simple printf should work:

Code:

printf '<device>%s</device>\n' $(<infile)

If you want to modify the existing file in-place:

Code:

perl -i.bck -pe's|[\d.]+|<device>$&</device>|' infile

thanks to both of u! but in the first solutions it doesnt modify the file thought it just prints the solution in my shell. how is that possible?

You need to redirect the output or use tee.

Code:

awk '{print "<device> " $0 " </device>"}' original.txt | tee original.txt
or
awk '{print "<device> " $0 " </device>"}' original.txt > new.txt
mv new.txt original.txt