Pomelo Lee workspace

	mount -o loop /mnt/ubuntu-16.04.2-server-amd64.iso /cdrom

mount -o loop -t iso9660  /mnt/ubuntu-16.04.2-server-amd64.iso /cdrom

umount /dev/sdb4
mount /dev/sdb4 /mnt
mount -o loop /mnt/ubuntu-16.04.2-server-amd64.iso /cdrom
或者
mount -o loop -t iso9660  /mnt/ubuntu-16.04.2-server-amd64.iso /cdrom

sudo apt-get install openssh-server

#sudo vi /etc/ssh/sshd_config

#sudo service ssh restart

#sudo  passwd  root

$ git config --global user.name "Leeyz"
$ git config --global user.email "[email protected]"

$ git config --global credential.helper store

$ rm ~/.gitconfig
$ rm ~/.git-credentials

$ git config --global http.emptyAuth true

mysql> show global variables like '%general%';
+------------------+----------------------------+
| Variable_name    | Value                      |
+------------------+----------------------------+
| general_log      | OFF                         |
| general_log_file | /var/run/mysqld/mysqld.log |
+------------------+----------------------------+
2 rows in set (0.00 sec)
 
mysql> set global general_log=on;
Query OK, 0 rows affected (0.00 sec)
 
mysql> set global general_log_file='/data/logs/mysql/mysql_general_log.log';
ERROR 1231 (42000): Variable 'general_log_file' can't be set to the value of '/data/logs/mysql/mysql_general_log.log'

chown -R mysql:mysql /data/logs/mysql/
chomd 777 /data/logs/mysql/mysql_general_log.log

git config --global user.email "你的邮件地址"
git config --global user.name "你的Git用户名"

#!/bin/sh
git filter-branch --env-filter '
OLD_EMAIL="旧的Email地址"
CORRECT_NAME="正确的用户名"
CORRECT_EMAIL="正确的邮件地址"
if [ "$GIT_COMMITTER_EMAIL" = "$OLD_EMAIL" ]
then
    export GIT_COMMITTER_NAME="$CORRECT_NAME"
    export GIT_COMMITTER_EMAIL="$CORRECT_EMAIL"
fi
if [ "$GIT_AUTHOR_EMAIL" = "$OLD_EMAIL" ]
then
    export GIT_AUTHOR_NAME="$CORRECT_NAME"
    export GIT_AUTHOR_EMAIL="$CORRECT_EMAIL"
fi
' --tag-name-filter cat -- --branches --tags

git push --force --tags origin 'refs/heads/*'

shell> hostnamectl set-hostname centos7
shell> su
shell> hostname
centos7

shell> vi /etc/sysconfig/network
# Created by anaconda
NETWORKING=yes
HOSTNAME=centos6
:wq #保存并退出

#A主机设置
shell> vi /etc/sysconfig/network
GATEWAY=192.168.1.100 #当前主机内网ip
:wq #保存并退出
#A/B主机设置
shell> vi /etc/hosts
192.168.1.100 hostname
:wq #保存并退出

#ignore these files
*.class
classes/
target/
build/

Sets the root directory for requests. For example, with the following configuration
location /i/ {
    root /data/w3;
}
The /data/w3/i/top.gif file will be sent in response to the “/i/top.gif” request

Defines a replacement for the specified location. For example, with the following configuration
location /i/ {
    alias /data/w3/images/;
}
on request of “/i/top.gif”, the file /data/w3/images/top.gif will be sent.

location /api/v1/upload {  
     alias /home/v1/upload/;  
}

package main
 
import (
    "fmt"
    "time"
)
 
func main() {
    i := 10000
    for j := 0; j < 3; j++ {
        // 使用多协程处理，其中可以预见的是除数为0会抛出异常
        go divide(i, j)
    }
 
    // 为了保证前面线程运行完，这里休眠一下
    for {
        time.Sleep(1 * time.Second)
    }
}
 
func divide(i, j int) {
    // 定义recover方法，在后面程序出现异常的时候就会捕获
    defer func() {
        if r := recover(); r != nil {
            // 这里可以对异常进行一些处理和捕获
            fmt.Println("Recovered:", r)
        }
    }()
 
    fmt.Println(i / j)
}