Hi, the follwing will run with bash, but not with /bin/sh. How to write the increment statement so that /bin/sh will like it? I played around with "let" but without success. #!/bin/sh i=1 while [ $i -le $1 ] do echo "Run " $i i=$[$i+1] <--- bash can do that, not /bin/sh done Thanks for help -Florian