centos6.6系统初始化脚本

#!/bin/bash
# Program:
#       system_init_shell
# History:
#       2012/06/01 25061008@qq.com
# Release:
#       1.1
cat << EOF
 +--------------------------------------------------------------+
 |          === Welcome to CentOS 6.x System init ===           |
 +--------------------------------------------------------------+
 +---------------------------by 元心科技--------------------------+
EOF
for i in `ls /etc/yum.repos.d/*`
do
    mv ${i} ${i}_bak
done

cp ./configs/local.repo /etc/yum.repos.d/
yum clean all
for i in gcc gcc-c++ glibc make autoconf libtool-ltdl-devel gd-devel freetype-devel libxml2-devel libjpeg-devel libpng-devel openssl-devel curl-devel bison patch unzip libmcrypt-devel libmhash-devel ncurses ncurses-devel sudo bzip2 mlocate flex lrzsz sysstat lsof setuptool  system-config-network-tui system-config-firewall-tui ntp libaio-devel wget ntp createrepo yum-downloadonly iftop
do
   yum -y install ${i} > /dev/null 2>&1
   if [ $? -eq 0 ];
   then
        echo "${i} is installed"
   else
        echo "${i} is installed to error"
   fi
done

#set profile
\cp ./configs/profile /etc
source /etc/profile

#set ntp
echo "*/5 * * * * /usr/sbin/ntpdate time.windows.com > /dev/null 2>&1" >> /var/spool/cron/root
service crond restart

#set clock
hwclock --set --date="`date +%D\ %T`"
hwclock --hctosys

#set ulimit
echo "ulimit -SHn 102400" >> /etc/rc.local
cat >> /etc/security/limits.conf << EOF
 *           soft   nofile       102400
 *           hard   nofile       102400
 *           soft   nproc        102400
 *           hard   nproc        102400
EOF

#set max user processes
#sed -i 's/1024/102400/' /etc/security/limits.d/90-nproc.conf

# turnoff the control-alt-delete
sed -i 's#exec /sbin/shutdown -r now#\#exec /sbin/shutdown -r now#' /etc/init/control-alt-delete.conf

#close useless service
for i in `ls /etc/rc3.d/S*`
do
   CURSRV=`echo $i|cut -c 15-`
   echo $CURSRV
case $CURSRV in
   crond | irqbalance | network | sshd | rsyslog | sysstat )
   echo "Base services, Skip!"
   ;;
   *)
   echo "change $CURSRV to off"
   chkconfig --level 2345 $CURSRV off
   service $CURSRV stop
   ;;
esac
done
echo "service is init is ok.............."

#set LANG
:> /etc/sysconfig/i18n
cat >> /etc/sysconfig/i18n << EOF
 LANG="en_US.UTF-8"
EOF

#set ssh
sed -i 's/^GSSAPIAuthentication yes$/GSSAPIAuthentication no/' /etc/ssh/sshd_config
sed -i 's/#UseDNS yes/UseDNS no/' /etc/ssh/sshd_config
service sshd restart

#set sysctl
true > /etc/sysctl.conf
cat >> /etc/sysctl.conf << EOF
 net.ipv4.ip_forward = 0
 net.ipv4.conf.default.rp_filter = 1
 net.ipv4.conf.default.accept_source_route = 0
 kernel.sysrq = 0
 kernel.core_uses_pid = 1
 net.ipv4.tcp_syncookies = 1
 kernel.msgmnb = 65536
 kernel.msgmax = 65536
 kernel.shmmax = 68719476736
 kernel.shmall = 4294967296
 net.ipv4.tcp_max_tw_buckets = 6000
 net.ipv4.tcp_sack = 1
 net.ipv4.tcp_window_scaling = 1
 net.ipv4.tcp_rmem = 4096 87380 4194304
 net.ipv4.tcp_wmem = 4096 16384 4194304
 net.core.wmem_default = 8388608
 net.core.rmem_default = 8388608
 net.core.rmem_max = 16777216
 net.core.wmem_max = 16777216
 net.core.netdev_max_backlog = 262144
 net.core.somaxconn = 262144
 net.ipv4.tcp_max_orphans = 3276800
 net.ipv4.tcp_max_syn_backlog = 262144
 net.ipv4.tcp_timestamps = 0
 net.ipv4.tcp_synack_retries = 1
 net.ipv4.tcp_syn_retries = 1
 net.ipv4.tcp_tw_recycle = 1
 net.ipv4.tcp_tw_reuse = 1
 net.ipv4.tcp_mem = 94500000 915000000 927000000
 net.ipv4.tcp_fin_timeout = 1
 net.ipv4.tcp_keepalive_time = 1200
 net.ipv4.ip_local_port_range = 1024 65535
EOF
/sbin/sysctl -p
echo "sysctl set OK!!"

#disable ipv6
#echo "alias net-pf-10 off" >> /etc/modprobe.conf
#echo "alias ipv6 off" >> /etc/modprobe.conf
#/sbin/chkconfig ip6tables off
#echo "ipv6 is disabled!"

#disable selinux
sed -i '/SELINUX/s/enforcing/disabled/' /etc/selinux/config
setenforce 0

#vim setting

sed -i "8 s/^/alias vi='vim'/" /root/.bashrc
echo 'syntax on' > /root/.vimrc

cat << EOF
 +--------------------------------------------------------------+
 |                    ===System init over===                    |
 +--------------------------------------------------------------+
 +---------------------------by 元心科技------------------------+
EOF
echo "###############################################################"