I am new to Unix and I am trying to write a Bourne shell script. I have 2 questions: 1. One of the command line parms for the script needs to be converted to upper case within the script, how do I do this? I tried tr 'a-z' 'A-Z'. It works fine on the command line but not when I want to pass $1 to change it to upper case in my script 2. I am reading 2 parms from the command line, and I want to set a default if no parms are entered. How do I do this? will this work? case $# in 1)days=$1;; 0)days=2;; 2)domain=$2;; 0)domain=mydomain;; esac

1) Try this: string=`echo $1 | tr '[a-z]' '[A-Z]'` 2) # Start of sample-1 case $# in   0) days=default; domain=default;;   1) days=$1; domain=default;;   2) days=$1; domain=$2;; esac # End of sample-1, start of sample-2 days=default; domain=default; case $# in   1) days=$1;;   2) days=$1; domain=$2;; esac # End of sample-2