• FOFA/Shodan/hunter.qianxin etc search engine can be used to find unexpected exposed services, e.g. port:9200 for ES
  • summarize your tool in a markdown table with availability, use this prompt to check ChatGPT’s levels, and re-enable some skills
  • :g/foo/s/bar/baz/ in vim can replace bar with baz in the line contains foo
  • :v same as :g!, inverse searching. :v/foo/d will delete lines not contains foo