What should I clear from the existing machine if rac installation fails or you want to reinstall it?

Rac installation fails or you want to reinstall it. On the existing machine, you should clear the items that cannot be successfully installed once. Sometimes you may have to wait for multiple times. In this way, you need to clear the previously installed items.
Some items are cleared as follows, and the steps are irrelevant. My OS is: redhat as 4 update 7,
Oracle version: 10.2.0.11. rm-rf/etc/oracle/* rm-rf/var/tmp /. modify the/etc/inittab in oracle and delete the following three rows. www.2cto.com h1: 2: respawn:/etc/init. evmd run>/dev/null 2> & 1 </dev/nullh2: 2: respawn: /etc/init.css d fatal>/dev/null 2> & 1 </dev/nullh3: 2: respawn:/etc/init. crsd run>/dev/null 2> & 1 </dev/null2.rm-rf/etc/ora * -- oracle software is installed before 3.rm-rf/tmp/* 4.rm-rf /crs/* 5.cd/app/oracle -- ORACLE_BASE directory www.2cto.com Rm-rf admin -- rm-rf oraInventory/6.cd/app/oracle/product/10.2.0/db_2 -- ORACLE_HOME directory rm-rf * 7 should be available only after the database is created. -- clear raw devicedd used by ocr and voting if =/dev/zero of =/dev/raw/raw1 bs = 104857600 count = 1 (bs is measured in bytes) dd if =/dev/zero of =/dev/raw/raw2 bs = 104857600 count = 18. -- clear the partitiondd used by the disk group if =/dev/zero of =/dev/sdb1 bs = 1610612736 count = 1dd if =/dev/zero of =/dev/sdc1 bs = 1610612736 count = 1dd if =/dev/zero o F =/dev/sdd1 bs = 1610612736 count = 19. chown oracle. oinstall/crs -- crs is the main directory of crs. After crs is installed, its owner is changed to root. to reinstall it, you need to change it to oracle. Of course, it is recommended to restart the machine !!