Command
yum update -y yum install haproxy mv /etc/haproxy/haproxy.cfg /etc/haproxy/haproxy.cfg.default vi /etc/haproxy/haproxy.cfg
copy to haproxy.cfg
global ulimit-n 51200 defaults log global mode tcp option dontlognull timeout connect 1000ms timeout client 150000ms timeout server 150000ms frontend 80-in bind *:80 default_backend 80-out backend 80-out server server1 original Ip maxconn 20480
Auto start haproxy
sudo chkconfig haproxy on
firewall
firewall-cmd --zone=public --add-port=80/tcp --permanent
systemctl stop firewalld.service systemctl start firewalld.service systemctl restart firewalld.service
Ipatbles
iptables -A INPUT -p tcp --dport 80 -j ACCEPT iptables -A OUTPUT -p tcp --sport 80 -j ACCEPT
systemctl save iptables.service systemctl restart iptables.service
Postfix中有一套Mail Queue Management机制,所有队列中的邮件都可以全自动的处理,但在发送大量邮件的时候,有必要对这个队列进行手工的维护处理,比如说,删除队列中的邮件. 以下是一些常用的命令：
列出目前在 Mail Queue 中的邮件
mailq
刪除所有在 Queue 中的邮件
postsuper -d ALL
fdisk -l
mkdir /home/sdb1 mount -t ntfs-3g /dev/sdb1 /home/sdb1
vi /etc/fstab /dev/sdb1 /home/sdb1 ntfs-3g defaults 0 0
http://php.net/manual/en/timezones.php
date.timezone = Pacific/Auckland
command
cd / du --max-depth=1 -h
/var/log
Configure eth0
vi /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE="eth0" NM_CONTROLLED="yes" ONBOOT=yes HWADDR=A4:BA:DB:37:F1:04 TYPE=Ethernet BOOTPROTO=static NAME="System eth0" UUID=5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03 IPADDR=192.168.1.44 NETMASK=255.255.255.0
## Configure Default Gateway
#
vi /etc/sysconfig/network
NETWORKING=yes HOSTNAME=centos6 GATEWAY=192.168.1.1
## Restart Network Interface
#
/etc/init.d/network restart
## Configure DNS Server
#
vi /etc/resolv.conf
nameserver 8.8.8.8 # Replace with your nameserver ip nameserver 192.168.1.1 # Replace with your nameserver ip
Linux VPS添加SWAP(交换分区)
1.进入目录
cd /var/
2.获取要增加的SWAP文件块(这里以1GB为例)
dd if=/dev/zero of=swapfile bs=1024 count=1038336
2G
dd if=/dev/zero of=swapfile bs=2048 count=2097152
3.创建SWAP文件
/sbin/mkswap swapfile
4.激活SWAP文件
/sbin/swapon swapfile
5.查看SWAP信息是否正确
/sbin/swapon –s
6.添加到fstab文件中让系统引导时自动启动
echo "/var/swapfile swap swap defaults 0 0" >>/etc/fstab
上面这步也可以修改/etc/fstab，末尾加入/var/swapfile swap swap defaults 0 0
7.查看是否挂载成功
free -m
一次性安装代码
cd /var/ dd if=/dev/zero of=swapfile bs=1024 count=1038336 /sbin/mkswap swapfile /sbin/swapon swapfile echo "/var/swapfile swap swap defaults 0 0" >>/etc/fstab
安装命令如下：
curl -LsSf http://github.com/mxcl/homebrew/tarball/master | sudo tar xvz -C/usr/local --strip 1
当brew安装成功后，就可以随意安装自己想要的软件了，例如wget，命令如下：
sudo brew install wget
卸载的话，命令如下：
sudo brew uninstall wget
查看安装软件的话，命令如下：
sudo brew search /apache*/
注意/apache*/是使用的正则表达式，用/分割。
Introduction
Rsync, which stands for “remote sync”, is a remote and local file synchronization tool. It uses an algorithm that minimizes the amount of data copied by only moving the portions of files that have changed.
In this guide, we will cover the basic usage of this powerful utility. We will be using an Ubuntu 12.04 VPS in the examples, but you can use any modern Linux distribution to follow along.
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