First script can be run before install of database 11G-XE or after an upgrade or other work on the OS. Second script is for Oracle 18c XE on Ubuntu 18.
install Oracle 11G-XE, soon 18c-XE on Ubuntu
First script can be run before install of database 11G-XE or after an upgrade or other work on the OS. Second script is for Oracle 18c XE on Ubuntu 18.