groupadd -g 5000 dba useradd -g dba oracle passwd oracle vi /etc/oraInst.loc inventory_loc=/home/oracle/oraInventory inst_group=dba chown -R oracle.dba /etc/oraInst.loc vi /etc/sysctl.conf kernel.shmmax=536870912 kernel.shmmni=4096 kernel.shmall=2097152 kernel.sem=250 32000 100 128 fs.file-max=65536 net.ipv4.ip_local_port_range=1024 65000 net.core.rmem_default=262144 net.core.rmem_max=262144 net..