Same trying follow https://wiki.ubuntu.com/Kernel/BuildYourOwnKernel on Ubuntu 18.04.1
$ apt-get source linux-image-$(uname -r) Reading package lists... Done Picking 'linux-signed' as source package instead of 'linux-image-4.15.0-39-generic' E: Unable to find a source package for linux-signed
Same trying follow https:/ /wiki.ubuntu. com/Kernel/ BuildYourOwnKer nel on Ubuntu 18.04.1
$ apt-get source linux-image-$(uname -r) image-4. 15.0-39- generic'
Reading package lists... Done
Picking 'linux-signed' as source package instead of 'linux-
E: Unable to find a source package for linux-signed