I'm copying my kernel config file from an existing system to the kernel tree, and I entered this command:
/boot/config$(uname -r)
Yet I got:
bash: /boot/config-5.15.0-46-generic: Permission denied
Does anyone know why its saying permission denied and how to fix? I am using Ubuntu in VirtualBox.
As @Tsyvarev mentioned in comments it is possible that you're trying to execute file, that have no exec permissions:
$ ls -l /boot
...
-rw-r--r-- 1 root root 217414 Aug 20 2021 config-5.4.0-rc1+
...
Try to run: cat /boot/config-$(uname -r) to read the config file for currently running kernel.