%post
cd /tmp/custom_data >> /tmp/custom.log 2>&1
chmod +x install_packages.sh
sh install_packages.sh</p> <p>
# remove custom_data
rm -rf /tmp/custom_data</p> <p>
#vim syntax on
echo alias vi='vim' >> /etc/bashrc</p> <p># disable ipv6
echo "alias net-pf-10 off" >> /etc/modprobe.d/dist.conf
echo -e "optionstipv6tdisable=1" >> /etc/modprobe.d/dist.conf
echo "NETWORKING_IPV6=no" >> /etc/sysconfig/network</p> <p>#append lib
echo "/usr/local/lib/" >> /etc/ld.so.conf</p> <p>#modify lang
echo 'export LANG=zh_CN.UTF8' >> /etc/profile</p> <p>#disable system auto mail
echo "unset MAILCHECK" >> /etc/profile</p> <p>#modify history
echo 'export HISTTIMEFORMAT="%F %T `whoami` "' >> /etc/profile
sed -i "s/HISTSIZE=1000/HISTSIZE=999999999/" /etc/profile</p> <p>#modifu ssh port on 3389
echo 'Port 3389' >> /etc/ssh/sshd_config
echo 'UseDNS no' >> /etc/ssh/sshd_config</p> <p>
for i in `ls /etc/rc3.d/S*`
do
CURSRV=`echo $i|cut -c 15-`
chkconfig --level 3 $CURSRV off
done</p> <p>for i in crond rsyslog iptables network ntpd sshd sysstat;do chkconfig --level 3 $i on;done</p> <p>sed -i '/HOSTNAME=/d' /etc/sysconfig/network
echo 'HOSTNAME=test' >> /etc/sysconfig/network</p> <p></p> <p># sysctl
echo "net.core.netdev_max_backlog = 32768" >> /etc/sysctl.conf
echo "net.core.rmem_default = 8388608" >> /etc/sysctl.conf
echo "net.core.rmem_max = 16777216" >> /etc/sysctl.conf
echo "net.core.somaxconn = 32768" >> /etc/sysctl.conf
echo "net.core.wmem_default = 8388608" >> /etc/sysctl.conf
echo "net.core.wmem_max = 16777216" >> /etc/sysctl.conf
echo "net.ipv4.ip_local_port_range = 5000 65000" >> /etc/sysctl.conf
echo "net.ipv4.tcp_fin_timeout = 30" >> /etc/sysctl.conf
echo "net.ipv4.tcp_keepalive_time = 300" >> /etc/sysctl.conf
echo "net.ipv4.tcp_max_orphans = 3276800" >> /etc/sysctl.conf
echo "net.ipv4.tcp_max_syn_backlog = 65536" >> /etc/sysctl.conf
echo "net.ipv4.tcp_max_tw_buckets = 5000" >> /etc/sysctl.conf
echo "net.ipv4.tcp_mem = 94500000 915000000 927000000" >> /etc/sysctl.conf
echo "net.ipv4.tcp_syn_retries = 2" >> /etc/sysctl.conf
echo "net.ipv4.tcp_synack_retries = 2" >> /etc/sysctl.conf
echo "net.ipv4.tcp_syncookies = 1" >> /etc/sysctl.conf
echo "net.ipv4.tcp_timestamps = 0" >> /etc/sysctl.conf
echo "net.ipv4.tcp_tw_recycle = 1" >> /etc/sysctl.conf
echo "net.ipv4.tcp_tw_reuse = 1" >> /etc/sysctl.conf
/sbin/sysctl -p</p> <p># modify core ulimt
echo -e "*tsofttnofilet65535" >> /etc/security/limits.conf
echo -e "*thardtnofilet65535" >> /etc/security/limits.conf</p> <p>echo -e "*tsofttnofilet65535" >> /etc/security/limits.d/90-nproc.conf
