>ORA-00845: MEMORY_TARGET not supported on this system
how & why did you mess up & break the initialization parameters?
When as last time DB started without error?
What changed since then?
post results of following OS command
ls -ltr $ORACLE_HOME/dbs/
The DB has never started. I am trying to get it going. Here is what I got after running ls
# ls -ltr $ORACLE_HOME/dbs/
-rwxr-xr-x 1 oracle dba 2851 Aug 29 2011 init.ora
-rw-r----- 1 oracle dba 1536 Sep 3 11:44 orapwXE
-rw-r----- 1 oracle dba 2560 Sep 3 11:44 spfileXE.ora
Pl see this related thread - Ubuntu 12.04 Oracle XE and ORA-00845: MEMORY_TARGET not supported
Ubuntu is not a supported distro - so expect issues - Oracle&reg; Database Express Edition
/etc/init.d/oracle-shm is not available for Ubuntu 13.04.