ORA-27121: unable to determine size of shared memory segment

Installing Oracle 10G on Ubuntu this morning...

Got the following error:

Code:

ERROR:
 
ORA-01034: ORACLE not available
 
ORA-27121: unable to determine size of shared memory segment
 
Linux Error: 13: Permission denied

This is caused by Oracle installer not setting setuid on $ORACLE_HOME/bin/oracle. To fix do:

Code:

$ cd $ORACLE_HOME/bin
$ chmod 6751 oracle

	`ERROR:`

	`ORA-01034: ORACLE not available`

	`ORA-27121: unable to determine size of shared memory segment`

	`Linux Error: 13: Permission denied`

	`$ cd $ORACLE_HOME/bin`
	`$ chmod 6751 oracle`