apisix-release-3.0/utils# ./linux-install-openresty.sh

Hit:1 https://openresty.org/package/ubuntu focal InRelease
Hit:2 http://hk.archive.ubuntu.com/ubuntu focal InRelease
Hit:3 http://hk.archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:4 http://hk.archive.ubuntu.com/ubuntu focal-backports InRelease
Hit:5 http://hk.archive.ubuntu.com/ubuntu focal-security InRelease
Reading package lists... Done
./linux-install-openresty.sh: line 35: OPENRESTY_VERSION: unbound variable

Linux ubuntu 5.4.0-135-generic #152-Ubuntu SMP Wed Nov 23 20:19:22 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux