Can we install SDK 's for Colibri VF61 256MB V1.2A Colibri iMX6ULL 512MB IT/V1.1A Colibri iMX7 Dual 512MB V1.1D provided by Toradex in the same Host PC and use them simultaneously.
Yes, you can install different SDKs on the same host and use them simultaneously. Just make sure to install them in different folders. When you are compiling from command line, then you need to take care also to set up the correct path in the terminal as explained here.
Is the sdk installation directory path fixed or can be any thing to support for above requirement.
No, the installation directory is not fixed. You can install the SDK wherever you want, but common locations are under
/usr/local is the used by Toradex’s SDKs by default.