分享个简易版Linux服务器初始化Shell脚本

该Shell脚本主要用于新安装Linux服务器系统的初始化工作，具体包括：

关闭IPv6模块

关闭SELinux

让vim显示颜色

设置系统语言编码

优化系统服务

内核参数优化等。

可以根据自己的实际情况修改，可用于生产环境。原作者是NetSeek，本人做了部分修改。

复制代码

代码如下:

#!/bin/sh

# desc: lsm03624 modified by www.webnginx.com

#——————-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

* hard 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

cpuspeed | crond | irqbalance | microcode_ctl | mysqld | network | nginx | php-fpm | sendmail | sshd | syslog )

#这个启动的系统服务根据具体的应用情况设置，其中network、sshd、syslog是三项必须要启动的系统服务！

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 = 6″ >> /etc/sysctl.conf

echo “optimizited kernel configure was done!”