LFI to RCE Vulnerability

Dear, i am stuck here while solving the question in module: File Inclusion /Directory Traversal in HackTheBox academy. The question is to use lfi to rce vulnerability find the kernal version by executing the command “uname -a”. Please help me how can i do it? if the target: is this

Please help me.

It explains on the page about Injecting code into log files.

thanks, I sorted it out.