Hi I am new to Linux and am attempting to get wine 9.3 running and when i run the configure file I am told that the flex package is not installed, Firstly how do I check to see if this is true and secondly if so How do I remove it and install a new package. ( I just downloaded the latest version ) any and all help would be greatly appreciated

Hardware/software

Hp 5000dv
Intel core2 due 2GHz
1GB ram
80GB Sata HDD
Nvidia Geforce Go 7400

Knoppix 5.1.1