BACKUP ORACLE HOME AND INVENTORY

Oracle Home and Inventory Backup
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tar -cvf $ORACLE_HOME $ORACLE_HOME/oraInventory | gzip > Backup_Software_Version.tar.gz

Note:
tar -cvf <destination_location> <source_location>

ORACLE_HOME & ORACLE_CRS_HOME backup’s (for all nodes in RAC)

cd /u01/before_patch_backup

tar -cvf oracle_base_jun30.tar $ORACLE_BASE
tar -cvf oracle_home_jun30.tar $ORACLE_HOME
tar -cvf oracle_crs_home_jun30.tar $ORACLE_CRS_HOME

Controlfile Backup
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alter database backup controlfile to trace;

show parameter user_dump_dest
(go to udump dest and make the note of controlfile trace)