echo "Running runMeFixEtc.sh for Oracle install on Linux"
#
echo "Setting hosts file"
cp -p /etc/hosts /etc/hosts_original
cat >> /etc/hosts << EOF
# server IP address | fully qual domain name | local name
192.168.1.15  db_server.fqd_name.com db_server
123.45.67.89  db_server.fqd_name.com db_server
EOF
#
echo "copying ifcfg-eth0 to ifcfg-lo for Oracle"
mkdir /etc/sysconfig/network-scripts/SAVE
cp -p /etc/sysconfig/network-scripts/ifcfg-lo /etc/sysconfig/network-scripts/SAVE
cp -f etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-lo
#
echo "setting parameters for Oracle in csh.login"
cp -p csh.login csh_login.original
cat >> /etc/csh.login << EOF
if ( $USER == "oracle" ) then
  limit maxproc 16384
  limit descriptors 65536
  umask 022
endif
EOF
#
echo "adding oraInst.loc for Oracle"
#  MAKE SURE THIS IS THE PATH YOU WANT TO USE
#  AFTER CREATING THE ORACLE USER, WE WILL CHANGE OWNER OF THE FILE
touch etc/oraInst.loc
cat >> /etc/otaInst.loc << EOF
inventory_loc=/u01/app/oracle/oraInventory
inst_group=oinstall
EOF
#
echo "adding parameters for Oracle in profile"
cp -p /etc/profile /etc/profile_original
cat >> /etc/profile << EOF
# added per Oracle install instructions
# http://www.oracle.com/technology/pub/articles/smiley_10gdb_install.html
if [ $USER = "oracle" ]; then
    if [ $SHELL = "/bin/ksh" ]; then
        ulimit -p 16384
        ulimit -n 65536
    else
        ulimit -u 16384 -n 65536
    fi
    umask 022
fi
EOF
#
echo "setting kernel parameters for Oracle"
cp -p /etc/sysctl.conf /etc/sysctl_conf_original
cat >> /etc/sysctl.conf <<EOF
# These kernel tweaks were provided by the Oracle install guide
# http://www.oracle.com/technology/pub/articles/smiley_10gdb_install.html
kernel.shmall = 2097152
#  Half the size of the physical memory, in bytes
#  should be   grep MemTotal /proc/meminfo  multiplied by 512
kernel.shmmax = 3952031744
kernel.shmmni = 4096
kernel.sem = 250 32000 100 128
# fs.file-max = 65536  # ours is already better
net.ipv4.ip_local_port_range = 1024 65000
net.core.rmem_default = 262144
net.core.wmem_default = 262144
net.core.rmem_max = 262144
net.core.wmem_max = 262144
EOF
/sbin/sysctl -p
#
echo "setting security limits.conf for Oracle"
cp -p /etc/security/limits.conf /etc/security/limits_conf_original
cat >> /etc/security/limits.conf <<EOF
oracle soft nproc 2047
oracle hard nproc 16384
oracle soft nofile 1024
oracle hard nofile 65536
EOF
#
echo "setting pam.d login parameter for Oracle"
echo "It might be better to do this one by hand"
echo " there is a line in the file that needs to be"
echo " the last line. 
cp -p /etc/pam.d/login /etc/pam.d/login_original
cat >> /etc/pam.d/login <<EOF
# added for oracle
session	   required	pam_limits.so
# pam_selinux.so open should be the last session rule
session    required	pam_selinux.so open
EOF
#
echo "Done"
#