export ORACLE_HOME=/opt/oracle/product/21c/dbhomeXE export ORACLE_SID=XE export PATH=$PATH:$ORACLE_HOME/bin Apply changes:
wget https://download.oracle.com/otn-pub/otn_software/db-express/oracle-database-xe-21c-1.0-1.ol8.x86_64.rpm If the link fails, go to https://www.oracle.com/database/technologies/xe-downloads.html , accept the license, and copy the download URL for the . Step 3: Convert RPM to DEB sudo alien --scripts --to-deb oracle-database-xe-21c-1.0-1.ol8.x86_64.rpm This creates a .deb file (e.g., oracle-database-xe-21c_1.0-2_amd64.deb ). Step 4: Install the DEB Package sudo dpkg --install oracle-database-xe-21c_1.0-2_amd64.deb If you get dependency errors, run: install oracle xe 21c on ubuntu
If you prefer sqlplus not installed yet, install Oracle Instant Client separately, or use the SQL*Plus included in the XE installation: accept the license
sqlplus system@localhost:1521/XE Enter the password you set during configuration. install Oracle Instant Client separately
Enable auto-start on boot:
Then: