Linux 基本系统初始化脚本第一版

继续共享线上脚本，本脚本主要用于新装linux系统初始化工作。

#!/bin/sh 
# desc:  coralzd modified by www.freebsdsystem.org  www.linuxtone.org 
#-------------------cut begin------------------------------------------- 
#welcome 
cat << EOF 
+--------------------------------------------------------------+ 
|         === Welcome to Centos System init ===                | 
+--------------http://www.linuxtone.org------------------------+ 
+----------------------Author:NetSeek--------------------------+ 
EOF 
 
#disable ipv6 
cat << EOF 
+--------------------------------------------------------------+ 
|         === Welcome to Disable IPV6 ===                      | 
+--------------------------------------------------------------+ 
EOF 
echo "alias net-pf-10 off" >> /etc/modprobe.conf 
echo "alias ipv6 off" >> /etc/modprobe.conf 
/sbin/chkconfig --level 35 ip6tables off 
echo "ipv6 is disabled!" 
 
#disable selinux 
sed -i '/SELINUX/s/enforcing/disabled/' /etc/selinux/config 
echo "selinux is disabled,you must reboot!" 
 
#vim 
sed -i "8 s/^/alias vi='vim'/" /root/.bashrc 
echo 'syntax on' > /root/.vimrc 
 
#zh_cn 
sed -i -e 's/^LANG=.*/LANG="zh_CN.UTF-8"/'   /etc/sysconfig/i18n 
# configure file max to 52100 
echo "*                soft              nofile             52100 
*                               soft              nofile             52100" >> /etc/security/limits.conf 
 
#tunoff services 
#-------------------------------------------------------------------------------- 
cat << EOF 
+--------------------------------------------------------------+ 
|         === Welcome to Tunoff services ===                   | 
+--------------------------------------------------------------+ 
EOF 
#--------------------------------------------------------------------------------- 
for i in `ls /etc/rc3.d/S*` 
do 
              CURSRV=`echo $i|cut -c 15-` 
 
echo $CURSRV 
case $CURSRV in 
          crond | irqbalance | microcode_ctl | network | random | sendmail | sshd | syslog | local | mysqld ) 
      echo "Base services, Skip!" 
      ;; 
      *) 
          echo "change $CURSRV to off" 
          chkconfig --level 235 $CURSRV off 
          service $CURSRV stop 
      ;; 
esac 
done 
rm -rf /etc/sysctl.conf 
echo "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 = 134217728 
net.ipv4.ip_local_port_range = 1024 65536 
net.core.rmem_max = 16777216 
net.core.wmem_max = 16777216 
net.ipv4.tcp_rmem = 4096 87380 16777216 
net.ipv4.tcp_wmem = 4096 65536 16777216 
net.ipv4.tcp_fin_timeout = 3 
net.ipv4.tcp_tw_recycle = 1 
net.core.netdev_max_backlog = 30000 
net.ipv4.tcp_no_metrics_save = 1 
net.core.somaxconn = 262144 
net.ipv4.tcp_syncookies = 0 
net.ipv4.tcp_max_orphans = 262144 
net.ipv4.tcp_max_syn_backlog = 262144 
net.ipv4.tcp_synack_retries = 2 
net.ipv4.tcp_syn_retries = 2 
vm.swappiness = 3" >> /etc/sysctl.conf 
echo "optimizited kernel configure was done!"