Installation:

-Unlock bootloader (Detailed Steps: https://wiki.lineageos.org/devices/salami/install/#unlocking-the-bootloader)

-Flash LineageOS init_boot, boot, vendor_boot and recovery images from bootloader mode, by running the following commands:

fastboot flash init_boot init_boot.img
fastboot flash boot boot.img
fastboot flash vendor_boot vendor_boot.img
fastboot flash recovery recovery.img
fastboot -w
fastboot reboot recovery

-While in recovery mode, factory reset (wipe/format data).

-Now sideload the *.zip

NOTE: if sideload gives error 7, reboot to fastbootd (enter fastboot option on recovery) and wipe the super partition using "fastboot wipe-super super_empty.img" then go back to recovery and sideload again.

-If you want to install any additional packages, such as GApps (https://wiki.lineageos.org/gapps),recovery will ask you to reboot again and flash that, or you can select no and boot to the system.

-Enjoy.

(Button combination to boot to bootloader : with device powered off, Volume down + Volume up + Power)