Question

I need to find file extension for file to be processed using UNIX. The two file extension which i will be handling are ‘.dat’ and ‘.csv’.

Please let me know how this can be done.

Answer 1

So my stab at this.

filename=file.dat
extension=$(echo ${filename}|awk -F\. '{print $2}')
if [ ${extension} == "dat" ]; then
   your code here
fi

Echo the variable ${filename} pipe that output to awk. With awk reset the field separator to a . then pick up field 2 (the print $2 part)