10/01/2017 – 一江春水向东流

centos系统优化脚本

#!/bin/bash
#written by mofansheng@2015-11-03
#system optimization script
#The fllow apply to CentOS 6.x
. /etc/init.d/functions
 
function check_ok(){
  if [ $? -eq 0 ]
   then
     echo ""
     continue
  else
     echo "pls check error"
     exit
  fi
}
 
cat<<EOF
-----------------------------------------------------------------------
|                     system optimization                             |
-----------------------------------------------------------------------
EOF
#1. 更新系统
yum update -y
yum install net-tools wget telnet perl perl-devel kernel-devel bash-completion ntpdate vim
#yum install gcc cmake bzip2-devel curl-devel db4-devel libjpeg-devel libpng-devel freetype-devel libXpm-devel gmp-devel libc-client-devel openldap-devel unixODBC-devel postgresql-devel sqlite-devel aspell-devel net-snmp-devel libxslt-devel libxml2-devel pcre-devel pspell-devel libmemcached libmemcached-devel zlib-devel  vim wget   lrzsz  tree
yum groupinstall "Development tools" -y
#2. 给/etc/rc.local添加执行权限
chmod +x /etc/rc.d/rc.local

#3. 关闭不必要服务close unimportant system services
echo "===Close unimportant system services,it will take serval mintinues==="
for i in `systemctl list-unit-files |grep 'enabled'| awk '{print $1}' |grep -Ev "crond|sshd|sysstat|rsyslog|network|dbus|systemd|multi|default|NetworkManager|auditd"`; do 
	systemctl disable $i;systemctl stop $i;systemctl status $i
done
check_ok
action "Close unimportant system services" /bin/true
 
 
#4. close selinux
echo "===close SELINUX==="
if [ `getenforce` != "Disabled" ]
then
 sed -i  '/^SELINUX/s/enforcing/disabled/g' /etc/selinux/config
 setenforce 0
 echo "selinux is disabled"
else
 action "SELINUX is closed" /bin/true
fi
check_ok
action "Close SELINUX" /bin/true
 
#5. 关闭防火墙安装iptables
systemctl   stop   firewalld.service 
systemctl   disable firewalld.service
yum install iptables-services -y

#6. 修改主机名
hostnamectl set-hostname vm1

#7. 设置字符集 
yum -y install kde-l10n-Chinese
localectl set-locale LANG=zh_CN.utf8
echo "LANG=zh_CN.UTF-8" > /etc/environment
echo "LC_ALL=zh_CN.UTF-8" >> /etc/environment
echo "LANG=zh_CN.utf8" > /etc/locale.conf
source  /etc/locale.conf

#8. 加大打开文件数的限制（open files）和内核优化
echo "* soft nofile 65535" >> /etc/security/limits.conf 
echo "* hard nofile 65535" >> /etc/security/limits.conf
echo "* soft nproc 65535" >> /etc/security/limits.conf
echo "* hard nproc 65535" >> /etc/security/limits.conf

cat >> /etc/sysctl.conf << "EOF"
#CTCDN系统优化参数
fs.file-max = 655536
#关闭ipv6
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
#决定检查过期多久邻居条目
net.ipv4.neigh.default.gc_stale_time=120
#使用arp_announce / arp_ignore解决ARP映射问题
net.ipv4.conf.default.arp_announce = 2
net.ipv4.conf.all.arp_announce=2
net.ipv4.conf.lo.arp_announce=2
# 避免放大攻击
net.ipv4.icmp_echo_ignore_broadcasts = 1
# 开启恶意icmp错误消息保护
net.ipv4.icmp_ignore_bogus_error_responses = 1
#关闭路由转发
net.ipv4.ip_forward = 0
net.ipv4.conf.all.send_redirects = 0
net.ipv4.conf.default.send_redirects = 0
#开启反向路径过滤
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.default.rp_filter = 1
#处理无源路由的包
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.conf.default.accept_source_route = 0
#关闭sysrq功能
kernel.sysrq = 0
#core文件名中添加pid作为扩展名
kernel.core_uses_pid = 1
# 开启SYN洪水攻击保护
net.ipv4.tcp_syncookies = 1
#修改消息队列长度
kernel.msgmnb = 65536
kernel.msgmax = 65536
#设置最大内存共享段大小bytes
kernel.shmmax = 68719476736
kernel.shmall = 4294967296
#timewait的数量，默认180000
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
#每个网络接口接收数据包的速率比内核处理这些包的速率快时，允许送到队列的数据包的最大数目
net.core.netdev_max_backlog = 262144
#限制仅仅是为了防止简单的DoS 攻击
net.ipv4.tcp_max_orphans = 3276800
#未收到客户端确认信息的连接请求的最大值
net.ipv4.tcp_max_syn_backlog = 262144
net.ipv4.tcp_timestamps = 0
#内核放弃建立连接之前发送SYNACK 包的数量
net.ipv4.tcp_synack_retries = 1
#内核放弃建立连接之前发送SYN 包的数量
net.ipv4.tcp_syn_retries = 1
#启用timewait 快速回收
net.ipv4.tcp_tw_recycle = 1
#开启重用。允许将TIME-WAIT sockets 重新用于新的TCP 连接
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_mem = 94500000 915000000 927000000
net.ipv4.tcp_fin_timeout = 1
#当keepalive 起用的时候，TCP 发送keepalive 消息的频度。缺省是2 小时
net.ipv4.tcp_keepalive_time = 1800
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.tcp_keepalive_intvl = 15
#允许系统打开的端口范围
net.ipv4.ip_local_port_range = 1024    65000
#修改防火墙表大小，默认65536
net.netfilter.nf_conntrack_max=655350
net.netfilter.nf_conntrack_tcp_timeout_established=1200
# 确保无人能修改路由表
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.default.accept_redirects = 0
net.ipv4.conf.all.secure_redirects = 0
net.ipv4.conf.default.secure_redirects = 0
EOF
#生效
sysctl -p
#用户进程限制
sed -i 's#4096#65535#g' /etc/security/limits.d/20-nproc.conf  #加大普通用户限制  也可以改为unlimited
 
#set SSH
sed -i 's/#UseDNS yes/UseDNS no/g' /etc/ssh/sshd_config
sed -i 's/#Port 22/Port 65500/g' /etc/ssh/sshd_config
service sshd restart
 
 
#set system files permission
chmod 600 /etc/passwd
chmod 600 /etc/group
chmod 600 /etc/shadow
chmod 600 /etc/gshadow
 
 
#set ntp
yum install ntpdate -y
ntpdate ntp.fudan.edu.cn
echo "* 3 * * * /usr/sbin/ntpdate ntp.fudan.edu.cn >/dev/null 2>&1" >>/etc/crontab
service crond restart
check_ok
action "ntpdate is installed and add in crontab" /bin/true
 
 
#set vim
echo "===install vim,it will take serval mintinues==="
yum install vim-enhanced -y &>/dev/null
alias vi=vim
echo "alias vi=vim" >>/root/.bashrc
check_ok
action "vim is installed" /bin/true
 
 
#set yum repos
echo "===update yum repos,it will take serval mintinues==="
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
yum clean all &>/dev/null
yum makecache &>/dev/null
check_ok
action  "yum repos update is ok" /bin/true

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#!/bin/bash

#written by mofansheng@2015-11-03

#system optimization script

#The fllow apply to CentOS 6.x

. /etc/init.d/functions

function check_ok(){

if [ $? -eq 0 ]

then

echo ""

continue

else

echo "pls check error"

exit

}

cat<<EOF

-----------------------------------------------------------------------

| system optimization |

-----------------------------------------------------------------------

EOF

#1. 更新系统

yum update -y

yum install net-tools wget telnet perl perl-devel kernel-devel bash-completion ntpdate vim

#yum install gcc cmake bzip2-devel curl-devel db4-devel libjpeg-devel libpng-devel freetype-devel libXpm-devel gmp-devel libc-client-devel openldap-devel unixODBC-devel postgresql-devel sqlite-devel aspell-devel net-snmp-devel libxslt-devel libxml2-devel pcre-devel pspell-devel libmemcached libmemcached-devel zlib-devel vim wget lrzsz tree

yum groupinstall "Development tools" -y

#2. 给/etc/rc.local添加执行权限

chmod +x /etc/rc.d/rc.local

#3. 关闭不必要服务close unimportant system services

echo "===Close unimportant system services,it will take serval mintinues==="

for i in `systemctl list-unit-files |grep 'enabled'| awk '{print $1}' |grep -Ev "crond|sshd|sysstat|rsyslog|network|dbus|systemd|multi|default|NetworkManager|auditd"`; do

systemctl disable $i;systemctl stop $i;systemctl status $i

done

check_ok

action "Close unimportant system services" /bin/true

#4. close selinux

echo "===close SELINUX==="

if [ `getenforce` != "Disabled" ]

then

sed -i '/^SELINUX/s/enforcing/disabled/g' /etc/selinux/config

setenforce 0

echo "selinux is disabled"

else

action "SELINUX is closed" /bin/true

check_ok

action "Close SELINUX" /bin/true

#5. 关闭防火墙安装iptables

systemctl stop firewalld.service

systemctl disable firewalld.service

yum install iptables-services -y

#6. 修改主机名

hostnamectl set-hostname vm1

#7. 设置字符集

yum -y install kde-l10n-Chinese

localectl set-locale LANG=zh_CN.utf8

echo "LANG=zh_CN.UTF-8" > /etc/environment

echo "LC_ALL=zh_CN.UTF-8" >> /etc/environment

echo "LANG=zh_CN.utf8" > /etc/locale.conf

source /etc/locale.conf

#8. 加大打开文件数的限制（open files）和内核优化

echo "* soft nofile 65535" >> /etc/security/limits.conf

echo "* hard nofile 65535" >> /etc/security/limits.conf

echo "* soft nproc 65535" >> /etc/security/limits.conf

echo "* hard nproc 65535" >> /etc/security/limits.conf

cat >> /etc/sysctl.conf << "EOF"

#CTCDN系统优化参数

fs.file-max = 655536

#关闭ipv6

net.ipv6.conf.all.disable_ipv6 = 1

net.ipv6.conf.default.disable_ipv6 = 1

#决定检查过期多久邻居条目

net.ipv4.neigh.default.gc_stale_time=120

#使用arp_announce / arp_ignore解决ARP映射问题

net.ipv4.conf.default.arp_announce = 2

net.ipv4.conf.all.arp_announce=2

net.ipv4.conf.lo.arp_announce=2

# 避免放大攻击

net.ipv4.icmp_echo_ignore_broadcasts = 1

# 开启恶意icmp错误消息保护

net.ipv4.icmp_ignore_bogus_error_responses = 1

#关闭路由转发

net.ipv4.ip_forward = 0

net.ipv4.conf.all.send_redirects = 0

net.ipv4.conf.default.send_redirects = 0

#开启反向路径过滤

net.ipv4.conf.all.rp_filter = 1

net.ipv4.conf.default.rp_filter = 1

#处理无源路由的包

net.ipv4.conf.all.accept_source_route = 0

net.ipv4.conf.default.accept_source_route = 0

#关闭sysrq功能

kernel.sysrq = 0

#core文件名中添加pid作为扩展名

kernel.core_uses_pid = 1

# 开启SYN洪水攻击保护

net.ipv4.tcp_syncookies = 1

#修改消息队列长度

kernel.msgmnb = 65536

kernel.msgmax = 65536

#设置最大内存共享段大小bytes

kernel.shmmax = 68719476736

kernel.shmall = 4294967296

#timewait的数量，默认180000

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

#每个网络接口接收数据包的速率比内核处理这些包的速率快时，允许送到队列的数据包的最大数目

net.core.netdev_max_backlog = 262144

#限制仅仅是为了防止简单的DoS 攻击

net.ipv4.tcp_max_orphans = 3276800

#未收到客户端确认信息的连接请求的最大值

net.ipv4.tcp_max_syn_backlog = 262144

net.ipv4.tcp_timestamps = 0

#内核放弃建立连接之前发送SYNACK 包的数量

net.ipv4.tcp_synack_retries = 1

#内核放弃建立连接之前发送SYN 包的数量

net.ipv4.tcp_syn_retries = 1

#启用timewait 快速回收

net.ipv4.tcp_tw_recycle = 1

#开启重用。允许将TIME-WAIT sockets 重新用于新的TCP 连接

net.ipv4.tcp_tw_reuse = 1

net.ipv4.tcp_mem = 94500000 915000000 927000000

net.ipv4.tcp_fin_timeout = 1

#当keepalive 起用的时候，TCP 发送keepalive 消息的频度。缺省是2 小时

net.ipv4.tcp_keepalive_time = 1800

net.ipv4.tcp_keepalive_probes = 3

net.ipv4.tcp_keepalive_intvl = 15

#允许系统打开的端口范围

net.ipv4.ip_local_port_range = 1024 65000

#修改防火墙表大小，默认65536

net.netfilter.nf_conntrack_max=655350

net.netfilter.nf_conntrack_tcp_timeout_established=1200

# 确保无人能修改路由表

net.ipv4.conf.all.accept_redirects = 0

net.ipv4.conf.default.accept_redirects = 0

net.ipv4.conf.all.secure_redirects = 0

net.ipv4.conf.default.secure_redirects = 0

EOF

#生效

sysctl -p

#用户进程限制

sed -i 's#4096#65535#g' /etc/security/limits.d/20-nproc.conf #加大普通用户限制也可以改为unlimited

#set SSH

sed -i 's/#UseDNS yes/UseDNS no/g' /etc/ssh/sshd_config

sed -i 's/#Port 22/Port 65500/g' /etc/ssh/sshd_config

service sshd restart

#set system files permission

chmod 600 /etc/passwd

chmod 600 /etc/group

chmod 600 /etc/shadow

chmod 600 /etc/gshadow

#set ntp

yum install ntpdate -y

ntpdate ntp.fudan.edu.cn

echo "* 3 * * * /usr/sbin/ntpdate ntp.fudan.edu.cn >/dev/null 2>&1" >>/etc/crontab

service crond restart

check_ok

action "ntpdate is installed and add in crontab" /bin/true

#set vim

echo "===install vim,it will take serval mintinues==="

yum install vim-enhanced -y &>/dev/null

alias vi=vim

echo "alias vi=vim" >>/root/.bashrc

check_ok

action "vim is installed" /bin/true

#set yum repos

echo "===update yum repos,it will take serval mintinues==="

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

yum clean all &>/dev/null

yum makecache &>/dev/null

check_ok

action "yum repos update is ok" /bin/true

By sean, 7 years ago

未分类

Mac系统下安装ipython分别支持python2和python3

操作系统：Mac10.11.5 python2.7.13 python3.6.1 安装python2：

brew install python

1	brew install python

安装python3：

brew install python3

1	brew install python3

此时，命令行输入python3则打开python3，输入python则打开python2。利用pip安装 ipython

sudo pip install ipython
sudo pip3 install ipython

1 2	sudo pip install ipython sudo pip3 install ipython

用pip安装ipython则是安装到python2的site-packages中，同理用pip3则是安装到python3的site-packages中。进入/usr/local/bin目录下，可以看到ipython文件，用vi打开：

sudo vi ipython

1	sudo vi ipython

#!/usr/local/opt/python/bin/python2.7

# -*- coding: utf-8 -*-
import re
import sys

from IPython import start_ipython

if __name__ == '__main__':
    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
    sys.exit(start_ipython())

#!/usr/local/opt/python/bin/python2.7

# -*- coding: utf-8 -*-

import re

import sys

from IPython import start_ipython

if __name__ == '__main__':

sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])

sys.exit(start_ipython())

#!/usr/local/opt/python/bin/python2.7这个目录就是指向python的版本，
例如我要定向成python3可以修改该成#!/usr/local/opt/python3/bin/python3.6
这样ipython这个命令打开的ipython指向的python版本就是python3了。为了方便我们可以复制这个文件为ipython3，把ipython3这个命令文件指向python3版本，这样在终端输入ipython打开的就是python2，输入ipython3打开的就是python3，是不是很方便！

#!/usr/local/opt/python/bin/python2.7这个目录就是指向python的版本，

例如我要定向成python3可以修改该成#!/usr/local/opt/python3/bin/python3.6

这样ipython这个命令打开的ipython指向的python版本就是python3了。为了方便我们可以复制这个文件为ipython3，把ipython3这个命令文件指向python3版本，这样在终端输入ipython打开的就是python2，输入ipython3打开的就是python3，是不是很方便！

By sean, 7 years10/01/2017 ago

October 1, 2017

未分类

centos系统优化脚本

未分类

Mac系统下安装ipython分别支持python2和python3