I have a src directory that now is 20GB after compiling 3 kernels, is this normal and if so how can I reduce it.
It is a home computer and relies on no other.
Using Debian 8.
Are "headers" refering to something in /src?

Fred.

You can run
1. make clean
2. make depclean

Thanks.
I have not heard of 'make depclean' before, what does that do? I take it I would have to do it for each kernel directory?
Also 'make clean' is usually done to prepare for the next configuration.
And does the working kernel reference what is in the /src directory?

Fred.

Make clean gets ready for another possible compilation. This is useful if you are not building the same kernel several times due to edits. It will delete all the object files (and object libraries). The result is as if you had done a make menuconfig, but not built the kernel yet.

Make depclean deletes configuration files generated as part of the make menuconfig step as well.

A running kernel does not depend on anything from the source directory. Usually, the kernel is configured and compiled in a user directory - only the install (which writes into /boot) steps require root.

Once the install is complete it is possible to delete the entire source kit.

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Thanks.

This is what I wanted to hear I will run make clean and make depclean to see how much space it clears up. Probably keep the Documentation and the .config files as well.

Fred.