来源：https://blog.csdn.net/weixin_42318691/article/details/108396640
家中esxi服务器外网访问。
esxi ip:192.168.2.71
服务器反代esxi，nginx配置如下
```
server{
        listen  [访问端口]     ssl;
        server_name [访问的域名];
        ssl_certificate    [证书路径]/fullchain.pem;
        ssl_certificate_key    [证书路径]/privkey.pem;
        ssl_session_timeout     5m;
        ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
        ssl_prefer_server_ciphers on;

        location / {
                proxy_pass https://192.168.2.71;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header Host $host;
                proxy_set_header X-Forward-Proto https;
                
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection "upgrade";
        }
}
```



反向代理esxi

描述
给你二叉树的根节点 root ，返回它节点值的 前序 遍历。

数据范围：二叉树的节点数量满足 
1≤n≤100
 
1≤n≤100  ，二叉树节点的值满足 
1≤val≤100
 
1≤val≤100  ，树的各节点的值各不相同
示例 1：
![](https://uploadfiles.nowcoder.com/images/20211111/392807_1636599059575/FE67E09E9BA5661A7AB9DF9638FB1FAC)

示例1
输入：
{1,#,2,3}
返回值：
[1,2,3]
```c++
/**
 * struct TreeNode {
 *	int val;
 *	struct TreeNode *left;
 *	struct TreeNode *right;
 *	TreeNode(int x) : val(x), left(nullptr), right(nullptr) {}
 * };
 */
class Solution {
public:
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     * 
     * @param root TreeNode类 
     * @return int整型vector
     */
    void preorder(vector<int>&res,TreeNode* root){
        if(root==NULL){
            return;
        }
        res.push_back(root->val);
        preorder(res, root->left);
        preorder(res,root->right);
    }
    vector<int> preorderTraversal(TreeNode* root) {
        // write code here
        vector<int>res;
        preorder(res, root);
        return res;
        
    }
};
```
### 中序遍历
```c++
/**
 * struct TreeNode {
 *	int val;
 *	struct TreeNode *left;
 *	struct TreeNode *right;
 *	TreeNode(int x) : val(x), left(nullptr), right(nullptr) {}
 * };
 */
class Solution {
public:
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     * 
     * @param root TreeNode类 
     * @return int整型vector
     */ 
    void inorder(vector<int>&res,TreeNode* root){
        if(root==NULL){
            return;
        }
        
        inorder(res, root->left);
        res.push_back(root->val);
        inorder(res, root->right);

    }
    vector<int> inorderTraversal(TreeNode* root) {
        // write code here
        vector<int>res;
        inorder(res, root);
        return res;
    }
};
```
### 后序遍历
```c++
/**
 * struct TreeNode {
 *	int val;
 *	struct TreeNode *left;
 *	struct TreeNode *right;
 *	TreeNode(int x) : val(x), left(nullptr), right(nullptr) {}
 * };
 */
class Solution {
public:
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     * 
     * @param root TreeNode类 
     * @return int整型vector
     */
    void postorder(vector<int>&res,TreeNode *root){
        if(root==NULL){
            return;
        }
        postorder(res, root->left);
        postorder(res, root->right);
        res.push_back(root->val);

    }
    vector<int> postorderTraversal(TreeNode* root) {
        // write code here
        vector<int>res;
        postorder(res,root);
        return res;

    }
};
```


二叉树-先/中/后序遍历

drop、truncate、 delete区别
最基本：
● drop直接删掉表。
● truncate删除表中数据，再插入时自增长id又从1开始。
● delete删除表中数据，可以加where字句。

drop,truncate,delete区别

    showDetail = new ShowDetail(ui->stackedWidget->widget(2));
    showDetail->move(60,155);

qt ui文件内嵌入ui文件

下载nexus
https://www.sonatype.com/products/sonatype-nexus-oss-download
https://download.sonatype.com/nexus/3/latest-unix.tar.gz
```bash
wget https://download.sonatype.com/nexus/3/latest-unix.tar.gz
tar -zxvf latest-unix.tar.gz 
```
运行nexus
```bash
root@iZj6ccbk1bxo1f33sa7xgyZ:/www/wwwroot/mirrors.momen.world/nexus-3.59.0-01/bin# ./nexus start
WARNING: ************************************************************
WARNING: Detected execution as "root" user.  This is NOT recommended!
WARNING: ************************************************************
Starting nexus
root@iZj6ccbk1bxo1f33sa7xgyZ:/www/wwwroot/mirrors.momen.world/nexus-3.59.0-01/bin# ./nexus status
WARNING: ************************************************************
WARNING: Detected execution as "root" user.  This is NOT recommended!
WARNING: ************************************************************
nexus is running.
root@iZj6ccbk1bxo1f33sa7xgyZ:/www/wwwroot/mirrors.momen.world/nexus-3.59.0-01/bin# 
```
https://blog.csdn.net/qq_44214446/article/details/128272077
查看nexus属性文件
nexus-3.59.0-01/etc$ cat nexus-default.properties 
创建gpg密钥对
`gpg --gen-key`
打印密钥信息
`gpg --list-keys`
导出并查看公钥
`gpg -a -o [密钥uid]_pub.asc --export [密钥uid]`
导出并查看私钥
`gpg -a -o [密钥uid]_pri.asc --export-secret-key [密钥uid]`