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|
#!/bin/bash
echo
"这个是系统初始化脚本,请慎重运行!"
input_fun()
{
OUTPUT_VAR=$1
INPUT_VAR=
""
while
[ -z $INPUT_VAR ];
do
read
-p
"$OUTPUT_VAR"
INPUT_VAR
done
echo
$INPUT_VAR
}
input_again()
{
MYHOSTNAME=$(input_fun
"please input the hostname:"
)
DOMAINNAME=$(input_fun
"please input the domainname:"
)
CARD_TYPE=$(input_fun
"please input card type(eth0):"
)
IPADDR=$(input_fun
"please input ip address(192.168.100.1):"
)
NETMASK=$(input_fun
"please input netmask(255.255.255.0):"
)
GATEWAY=$(input_fun
"please input gateway(192.168.100.1):"
)
MYDNS1=$(input_fun
"please input DNS1(114.114.114.114):"
)
MYDNS2=$(input_fun
"please input DNS2(8.8.4.4):"
)
}
input_again
MAC=$(
ifconfig
$CARD_TYPE |
grep
"HWaddr"
|
awk
-F[
" "
]+
'{print $5}'
)
#SET COMPUTER NAME
cat
>
/etc/sysconfig/network
<<ENDF
NETWORK=
yes
HOSTNAME=$MYHOSTNAME
ENDF
cat
>
/etc/sysconfig/network-scripts/ifcfg-
$CARD_TYPE <<ENDF
DEVICE=$CARD_TYPE
BOOTPROTO=static
HWADDR=$MAC
NM_CONTROLLED=
yes
ONBOOT=
yes
TYPE=Ethernet
IPV6INIT=no
IPADDR=$IPADDR
NETMASK=$NETMASK
GATEWAY=$GATEWAY
ENDF
/etc/init
.d
/network
restart
cat
>
/etc/hosts
<<ENDF
127.0.0.1 $MYHOSTNAME $MYHOSTNAME.$DOMAINNAME localhost
$IPADDR $MYHOSTNAME $MYHOSTNAME.$DOMAINNAME localhost
ENDF
cat
>
/etc/resolv
.conf <<ENDF
domain $DOMAINNAME
search $DOMAINNAME
nameserver $MYDNS1
nameserver $MYDNS2
ENDF
#关闭SEKINUX
sed
-i
's/SELINUX=enforcing/SELINUX=disabled/g'
/etc/sysconfig/selinux
setenforce 0
#修改文件打开数
echo
"* soft nofile 66666"
>>
/etc/security/limits
.conf
echo
"* hard nofile 66666"
>>
/etc/security/limits
.conf
#优化内核参数
cat
>>
/etc/sysctl
.conf << ENDF
net.ipv4.tcp_max_syn_backlog = 65536
net.core.netdev_max_backlog = 32768
net.core.somaxconn = 32768
net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_syn_retries = 2
net.ipv4.tcp_tw_recycle = 1
#net.ipv4.tcp_tw_len = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_mem = 94500000 915000000 927000000
net.ipv4.tcp_max_orphans = 3276800
net.ipv4.ip_local_port_range = 1024 65535
ENDF
sysctl -p
#关闭系统不用的服务
for
server
in
`chkconfig --list |
grep
3:on|
awk
'{ print $1}'
`
do
chkconfig --level 3 $server off
done
for
server
in
crond network rsyslog sshd
do
chkconfig --level 3 $server on
done
#增加用户并sudo提权
user_add()
{
USERNAME=$(input_fun
"please input new user name:"
)
useradd
$USERNAME
passwd
$USERNAME
}
user_add
chmod
+w
/etc/sudoers
echo
"$USERNAME ALL=(ALL) ALL"
>>
/etc/sudoers
chmod
-w
/etc/sudoers
#设置时间时区同步
yum -y
install
ntpdate
/usr/sbin/ntpdate
time
.nist.gov
echo
"*/5 * * * * root /usr/sbin/ntpdate time.nist.gov 1> /dev/null 2>&1"
>>
/var/spool/cron/root
#配置SSHD
sed
-i
'/^#Port/s/#Port 22/Port 65535/g'
/etc/ssh/sshd_config
sed
-i
'/^#UseDNS/s/#UseDNS yes/UseDNS no/g'
/etc/ssh/sshd_config
sed
-i
's/#PermitRootLogin yes/PermitRootLogin no/g'
/etc/ssh/sshd_config
sed
-i
's/#PermitEmptyPasswords no/PermitEmptyPasswords no/g'
/etc/ssh/sshd_config
iptables -A INPUT -p tcp --dport 65535 -j ACCEPT
/etc/init
.d
/sshd
restart
|
本文转自 rong341233 51CTO博客,原文链接:http://blog.51cto.com/fengwan/1430307