Linux系统最小化安装之后的系统基础环境安装以及内核优化脚本

 1 #!/bin/bash
 2 #添加epel和rpmforge的外部yum扩展源
 3 cd /usr/local/src
 4 wget http://mirrors.ustc.edu.cn/fedora/epel//5/x86_64/epel-release-5-4.noarch.rpm
 5 rpm -ivh epel-release-5-4.noarch.rpm
 6 wget http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.2-2.el5.rf.x86_64.rpm
 7 rpm -ivh rpmforge-release-0.5.2-2.el5.rf.x86_64.rpm
 8 #安装gcc基础库文件以及sysstat工具
 9 yum -y install gcc gcc-c++ vim-enhanced unzip unrar sysstat
10 #配置ntpdate自动对时
11 yum -y install ntp
12 echo "01 01 * * * /usr/sbin/ntpdate ntp.api.bz    >> /dev/null 2>&1" >> /etc/crontab
13 ntpdate ntp.api.bz
14 service crond restart
15 #配置文件的ulimit值
16 ulimit -SHn 65535
17 echo "ulimit -SHn 65535" >> /etc/rc.local
18 cat >> /etc/security/limits.conf << EOF
19 *                     soft     nofile             60000
20 *                     hard     nofile             65535
21 EOF
22 #tune kernel parametres(基础系统内核优化)
23 cat >> /etc/sysctl.conf << EOF
24 net.ipv4.tcp_syncookies = 1
25 net.ipv4.tcp_syn_retries = 1
26 net.ipv4.tcp_tw_recycle = 1
27 net.ipv4.tcp_tw_reuse = 1
28 net.ipv4.tcp_fin_timeout = 1
29 net.ipv4.tcp_keepalive_time = 1200
30 net.ipv4.ip_local_port_range = 1024 65535
31 EOF
32 /sbin/sysctl -p
33 #禁用control-alt-delete组合键以防止误操作
34 sed -i 's@ca::ctrlaltdel:/sbin/shutdown -t3 -r now@#ca::ctrlaltdel:/sbin/shutdown -t3 -r now@' /etc/inittab
35 #关闭SElinux
36 sed -i 's@SELINUX=enforcing@SELINUX=disabled@' /etc/selinux/config
37 #ssh服务配置优化
38 sed -i -e '74 s/^/#/' -i -e '76 s/^/#/' /etc/ssh/sshd_config
39 sed -i 's@#UseDNS yes@UseDNS no@' /etc/ssh/sshd_config
40 service sshd restart
41 #禁用ipv6地址
42 echo "alias net-pf-10 off" >> /etc/modprobe.conf
43 echo "alias ipv6 off" >> /etc/modprobe.conf
44 echo "install ipv6 /bin/true" >> /etc/modprobe.conf
45 echo "IPV6INIT=no" >> /etc/sysconfig/network
46 sed -i 's@NETWORKING_IPV6=yes@NETWORKING_IPV6=no@'    /etc/sysconfig/network
47 chkconfig ip6tables off
48 #vim基础语法优化
49 echo "syntax on" >> /root/.vimrc
50 echo "set nohlsearch" >> /root/.vimrc
51 #停用系统中不必要的服务
52 chkconfig bluetooth off
53 chkconfig sendmail off
54 chkconfig kudzu off
55 chkconfig nfslock off
56 chkconfig portmap off
57 chkconfig iptables off
58 chkconfig autofs off
59 chkconfig yum-updatesd off
60 #重启服务器
61 reboot