Automated tools

Start off with linPEAS then work your way down

PEASS-ng/linPEAS at master · peass-ng/PEASS-ngGitHub

GitHub - The-Z-Labs/linux-exploit-suggester: Linux privilege escalation auditing toolGitHub

GitHub - sleventyeleven/linuxprivchecker: linuxprivchecker.py -- a Linux Privilege Escalation Check ScriptGitHub