As a DBA, you must know the important locations of Oracle database and Exadata log files. Like database alert log file there is also a alert log file for the exadata cell nodes. So lets look at the locations of all these files.
Cell alert.log file
/opt/oracle/cell/log/diag/asm/cell/{node name}/trace/alert.log
if the CELLTRACE parameter is set just do cd $CELLTRACE
MS logfile
/opt/oracle/cell/log/diag/asm/cell/{node name}/trace/ms-odl.log.
orif the CELLTRACE parameter is set just do cd $CELLTRACE
Database alert logfile:
$ORACLE_BASE/diag/rdbms/{DBNAME}/{sid}/trace/alert_{sid}.log
Example: /u01/app/oracle/diag/rdbms/db12c/db12c1/trace/alert_db12c1.log
ASM alert.log
$ORACLE_BASE/diag/asm/+asm/+ASM{instance number}/trace/ alert_+ASM {instance number}.log
Ex: /u01/app/oracle/diag/asm/+asm/+ASM1/trace/alert_+ASM1.log
Listener logfile
$ORACLE_BASE/diag/tnslsnr/{node name}/listener/trace/listener.log
Example: /u01/app/oracle/diag/tnslsnr/orahowdb/listener/trace/listener.log
Diskmon logfiles
$GRID_HOME/log/{node name}/diskmon/diskmon.lo*
Ex: /u01/app/11.2.0/grid/log/orahowdb2/diskmon/diskmon.log
Clusterware CRS alert.log
$GRID_HOME/log/{node name}/alert{node name}.log
Ex: /u01/app/11.2.0/grid/log/orahowdb2/alertorahowdb2.log
Important Log Locations Clusterware daemon logs are all under /log/. Structure under /log/: alert.log - look here first for most clusterware issues ./admin: ./agent: ./agent/crsd: ./agent/crsd/oraagent_oracle: ./agent/crsd/ora_oc4j_type_oracle: ./agent/crsd/orarootagent_root: ./agent/ohasd: ./agent/ohasd/oraagent_oracle: ./agent/ohasd/oracssdagent_root: ./agent/ohasd/oracssdmonitor_root: ./agent/ohasd/orarootagent_root: ./client: ./crsd: ./cssd: ./ctssd: ./diskmon: ./evmd: ./gipcd: ./gnsd: ./gpnpd: ./mdnsd: ./ohasd: ./racg: ./racg/racgeut: ./racg/racgevtf: ./racg/racgmain: ./srvm:
Os message log file
/var/log/messages
