substring in shell script

[cruel]

Is there a way to get a substring from the arguments you read in? For example, you have the following arguments:
order1201.txt
order1202.txt

I want to process those files using "for ..." and create output files like
summary1201.txt
summary1202.txt

Can I get the substring starting from the 6th position in each of the argument for a legnth of 4 to create a compatible output file.

Thanks

 

[crowe]

for i in $* ; do
SS=`echo $i | cut -c 6-`
echo $SS
done

this will take everything passed to the script, and cut it from the 6th character to the end.


crowe

 

[cruel]

That was quick and helpful! So, if I want characters from 6th~9th, would I use
SS=`echo $i | cut -c 6-9` ?
Thanks again

 

[crowe]

Correct, cut -c 6-9 will get the 6th through 9th characters.

crowe