It’s telling me that they are already installed: j@j-HP-Notebook:~$ sudo apt-get install linux-headers-$(uname -r) [sudo] password for j: Reading package lists… Done Building dependency tree… Done Reading state information… Done linux-headers-5.15.0-88-generic is already the newest version (5.15.0-88.98). linux-headers-5.15.0-88-generic set to manually installed. The following packages were automatically installed and are no longer required: brave-keyring libu2f-udev linux-headers-5.15.0-76 linux-headers-5.15.0-76-generic linux-headers-5.15.0-78 linux-headers-5.15.0-78-generic linux-headers-5.15.0-79 linux-headers-5.15.0-79-generic linux-headers-5.15.0-82 linux-headers-5.15.0-82-generic linux-headers-5.15.0-83 linux-headers-5.15.0-83-generic linux-headers-5.15.0-84 linux-headers-5.15.0-84-generic linux-headers-5.15.0-86 linux-headers-5.15.0-86-generic linux-image-5.15.0-76-generic linux-image-5.15.0-78-generic linux-image-5.15.0-79-generic linux-image-5.15.0-82-generic linux-image-5.15.0-83-generic linux-image-5.15.0-84-generic linux-image-5.15.0-86-generic linux-modules-5.15.0-76-generic linux-modules-5.15.0-78-generic linux-modules-5.15.0-79-generic linux-modules-5.15.0-82-generic linux-modules-5.15.0-83-generic linux-modules-5.15.0-84-generic linux-modules-5.15.0-86-generic linux-modules-extra-5.15.0-76-generic linux-modules-extra-5.15.0-78-generic linux-modules-extra-5.15.0-79-generic linux-modules-extra-5.15.0-82-generic linux-modules-extra-5.15.0-83-generic linux-modules-extra-5.15.0-84-generic linux-modules-extra-5.15.0-86-generic Use ‘sudo apt autoremove’ to remove them. 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.