CentOS 已经发布了6.2版了，现在已经可以用在生产环境了，新版本的内核也能更好的利用硬件。写了一个脚本，用来初始化系统环境，现在分享出来，你可以根据自己的需要，，对脚本进行相应的修改。
脚本的内容如下：
#!/bin/bash#author suzezhi#this script is only for CentOS 6#check the OSplatform=`uname -i`if [ $platform != “x86_64” ];thenecho “this script is only for 64bit Operating System !”exit 1fiecho “the platform is ok”version=`lsb_release -r |awk ‘{print substr($2,1,1)}’`if [ $version != 6 ];thenecho “this script is only for CentOS 6 !”exit 1ficat << EOF+—————————————+| your system is CentOS 6 x86_64||start optimizing…….|+—————————————EOF#make the 163.com as the default yum repomv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backupwget -O /etc/yum.repos.d/CentOS-Base.repo#add the third-party repo#add the epelrpm -Uvh rpm –import /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6#add the rpmforgerpm -Uvh rpm –import /etc/pki/rpm-gpg/RPM-GPG-KEY-rpmforge-dag#update the system and set the ntpyum clean allyum -y update glibc\*yum -y update yum\* rpm\* python\*yum -y updateyum -y install ntpecho “* 4 * * * /usr/sbin/ntpdate 210.72.145.44 > /dev/null 2>&1” >> /var/spool/cron/rootservice crond restart#set the file limitecho “ulimit -SHn 102400” >> /etc/rc.localcat >> /etc/security/limits.conf << EOF*soft nofile65535*hard nofile65535EOF#set the control-alt-delete to guard against the miSUSEsed -i ‘s#exec /sbin/shutdown -r now#\#exec /sbin/shutdown -r now#’ /etc/init/control-alt-delete.conf#disable selinuxsed -i ‘s/SELINUX=enforcing/SELINUX=disabled/’ /etc/selinux/config#set sshsed -i ‘s/^GSSAPIAuthentication yes$/GSSAPIAuthentication no/’ /etc/ssh/sshd_configsed -i ‘s/#UseDNS yes/UseDNS no/’ /etc/ssh/sshd_configservice sshd restart#tune kernel parametrescat >> /etc/sysctl.conf << EOFnet.ipv4.tcp_fin_timeout = 1net.ipv4.tcp_keepalive_time = 1200net.ipv4.tcp_mem = 94500000 915000000 927000000net.ipv4.tcp_tw_reuse = 1net.ipv4.tcp_timestamps = 0net.ipv4.tcp_synack_retries = 1net.ipv4.tcp_syn_retries = 1net.ipv4.tcp_tw_recycle = 1net.core.rmem_max = 16777216net.core.wmem_max = 16777216net.core.netdev_max_backlog = 262144net.core.somaxconn = 262144net.ipv4.tcp_max_orphans = 3276800net.ipv4.tcp_max_syn_backlog = 262144net.core.wmem_default = 8388608net.core.rmem_default = 8388608EOF/sbin/sysctl -p#define the backspace button can erase the last character typedecho ‘stty erase ^H’ >> /etc/profileecho “syntax on” >> /root/.vimrc#stop some crontabmkdir /etc/cron.daily.bakmv /etc/cron.daily/makewhatis.cron /etc/cron.daily.bakmv /etc/cron.daily/mlocate.cron /etc/cron.daily.bakchkconfig bluetooth offchkconfig cups offchkconfig ip6tables off#disable the ipv6cat > /etc/modprobe.d/ipv6.conf << EOFIalias net-pf-10 offoptions ipv6 disable=1EOFIecho “NETWORKING_IPV6=off” >> /etc/sysconfig/networkcat << EOF+————————————————-+|optimizer is done|| it’s recommond to restart this server !|+————————————————-+EOF对脚本的内容做一下说明：
总结失败的原因能够让人越来越谨慎。
