歡迎來到Linux教程網
Linux教程網
Linux教程網
Linux教程網
您现在的位置: Linux教程網 >> UnixLinux >  >> Linux基礎 >> 關於Linux

Centos 5.X的初始化腳本

#!/bin/bash

# Program:

#       system_init_shell

# History:

#       2012/04/1 [email protected]

# Release:

#       1.1

cat << EOF

+--------------------------------------------------------------+

|          === Welcome to Centos 5.x System init ===           |

+--------------------------------------------------------------+

+---------------------------by opsren--------------------------+

EOF

#CHANGE yum

cd /etc/yum.repos.d

mv CentOS-Base.repo CentOS-Base.repo.bak

wget http://mirrors.163.com/.help/CentOS-Base-163.repo

mv CentOS-Base-163.repo  CentOS-Base.repo

yum clean metadata  #清除以前的緩存

yum makecache  #重新建立緩存

#update gcc

yum -y install gcc gcc-c++ bison patch unzip mlocate flex lrzsz sysstat

#set ntp

/usr/sbin/ntpdate ntp.api.bz

echo "*/5 * * * * /usr/sbin/ntpdate ntp.api.bz > /dev/null 2>&1" >> /var/spool/cron/root

service crond restart

#set clock

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

hwclock --hctosys

cat >> /etc/security/limits.conf << EOF

*           soft   nofile       102400

*           hard   nofile       102400

EOF

#close useless service

for i in `ls /etc/rc3.d/S*`

do

   CURSRV=`echo $i|cut -c 15-`

   echo $CURSRV

case $CURSRV in

   cpuspeed | crond | irqbalance | network | sshd | syslog | local )

   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 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!!"

#close ctrl+alt+del

sed -i "s/ca::ctrlaltdel:\/sbin\/shutdown -t3 -r now/#ca::ctrlaltdel:\/sbin\/shutdown -t3 -r now/" /etc/inittab

#close tty

sed -i "/tty[3-6]/ s/^/#/" /etc/inittab

#set purview

chmod 600 /etc/{passwd,shadow,group,gshadow}

#chattr /etc/{passwd,shadow}

#chattr +i /etc/{passwd,shadow,group,gshadow}

#lock system user

 passwd -l xfs

 passwd -l news

 passwd -l nscd

 passwd -l dbus

 passwd -l vcsa

 passwd -l games

 passwd -l haldaemon

 passwd -l gopher

 passwd -l ftp

 passwd -l mailnull

 passwd -l pcap

 passwd -l mail

 passwd -l shutdown

 passwd -l halt

 passwd -l uucp

 passwd -l operator

 passwd -l sync

 passwd -l adm

 passwd -l lp

#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

#vim setting

sed -i "8 s/^/alias vi='vim'/" /root/.bashrc

echo 'syntax on' > /root/.vimrc

#init_ssh

ssh_cfg="/etc/ssh/sshd_config"

sed -i -e '74 s/^/#/' -i -e '76 s/^/#/' $ssh_cfg

#sed -i "s/#Port 22/Port 65535/" $ssh_cfg

sed -i -e 's/GSSAPIAuthentication yes/GSSAPIAuthentication no/' -e 's/#UseDNS yes/UseDNS no/' $ssh_cfg

sed -i 's/#axAuthTries 6/axAuthTries 6/' $ssh_cfg

#client

sed -i -e '44 s/^/#/' -e '48 s/^/#/' $ssh_cfg

service sshd restart

echo "ssh is init is ok.............."

sed -i "s/HISTSIZE=1000/HISTSIZE=500/" /etc/profile

source /etc/profile

#history security

chattr +a /root/.bash_history

chattr +i /root/.bash_history

#tunoff disk I/0

mount -o noatime -o nodiratime -o remount /data

#mount -o noatime -o nodiratime -o remount /data1

cat << EOF

 +--------------------------------------------------------------+

 |                    ===System init over===                    |

 +--------------------------------------------------------------+

 +---------------------------by 邱治軍--------------------------+

EOF

echo "###############################################################"

Copyright © Linux教程網 All Rights Reserved