I tried to install Oracle client from http://www.oracle.com/technetwork/database/enterprise-edition/downloads/112010-linx8664soft-100572.html but some genius makes installer
Here's an example of how you might run 12c+ dbca from the command line. The parameters are all pretty much self-explanatory
dbca -silent -createDatabase -templateName General_Purpose.dbc -gdbname MY_CDB -sid MY_CDB -responseFile NO_VALUE \
-characterSet AL32UTF8 -sysPassword MyPassword123 -systemPassword MyPassword123 -createAsContainerDatabase true \
-numberOfPDBs 1 -pdbName MY_PDB -pdbAdminPassword MyPassword123 -databaseType MULTIPURPOSE \
-automaticMemoryManagement false -totalMemory 2000 -storageType FS -datafileDestination "//oradata/" \
-redoLogFileSize 200 -emConfiguration NONE -ignorePreReqs