oracle client download https://www.oracle.com/database/technologies/instant-client/linux-x86-64-downloads.html

ubuntuでoracle https://symfoware.blog.fc2.com/blog-entry-2378.html

https://oracledba.blogspot.com/2016/10/ubuntu-oracle-instant-client.html

sudo apt-get install alien

alien -i oracle-instantclientXX.X-basiclite-XX.X.0.0.0-1.x86_64.rpm
alien -i oracle-instantclientXX.X-sqlplus-XX.X.0.0.0-1.x86_64.rpm

sudo ldconfig

sudo sudo vi /etc/profile.d/oracle.sh && sudo chmod o+r /etc/profile.d/oracle.sh