原创 Qt C/C++ 編程獲取root權限 彈出系統授權窗口pkexec
system("pkexec ls /"); pkexec不同於sudo， sudo是在終端詢問用戶密碼，切換到管理員權限。pkexec會彈出操作系統授權窗口，輸入密碼後獲得管理員權限
2020-06-19 18:08:22
原创 linux dd urandom 生成指定大小隨機內容文件
正確方法 [yeqiang@localhost tmp]$ ll -h | grep data.bin -rw-rw-r--. 1 yeqiang yeqiang 100K 2020-06-17 15:43:20 data.bin [y
2020-06-19 18:08:22
8
原创 gnu C/C++ C語言十六進制打印緩衝區內容
void printhexDump(const char *buffer, size_t len) { if (buffer == NULL || len <= 0) { return; }
2020-06-19 18:08:22
原创 解決phabircator Unable to find `git-http-backend` in $PATH!
git clone 錯誤如下 [yeqiang@localhost tmp]$ git clone http://127.0.0.1:81/diffusion/2/test.git Cloning into 'test'... User
2020-06-19 18:08:22
5
原创 ‘strncpy’ output truncated before terminating nul copying as many bytes from a string as its length
錯誤信息： In function ‘AllocString’, inlined from ‘SetData’ at /home/yeqiang/Downloads/openjdk-jdk-14-23/src/java.desk
2020-06-19 18:08:22
原创 git 排除已經加入版本控制的文件、目錄
[yeqiang@localhost tmp]$ mkdir testignore [yeqiang@localhost tmp]$ cd testignore/ [yeqiang@localhost testignore]$ git
2020-06-19 18:08:22
原创 websocket Frame研究
https://www.cnblogs.com/imayi/archive/2012/05/05/2485343.html
2020-06-19 18:08:21
原创 解決銀河麒麟kylin.desktop-generic編譯生成的程序執行報錯“權限不夠”
問題復現 編寫一個簡單的a.c程序 #include <stdio.h> void main(){ printf("zzz\n"); } 編譯該程序，生成a.out可執行程序 greatwall@greatwall-KVM-V
2020-06-13 22:55:44
10
原创 Qt C++ cannot find -lGL
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-redhat-linux/9/../../../libGL.so when searching for -lGL /usr/b
2020-06-13 22:55:44
原创 openjdk8 AtomicLong addAndGet()方法源碼分析
AtomicLong 類 /** * Atomically adds the given value to the current value. * * @param delta the value
2020-06-08 19:16:09
原创 Fedora 31 上用minkube部署一個單節點kubernetes並測試基礎kubectl指令
下載minkube [yeqiang@localhost ~]$ cd Downloads/ [yeqiang@localhost Downloads]$ curl -LO https://storage.googleapis.com/
2020-06-08 19:15:58
15
原创 Java長整形原子操作測試
package com.example; import java.util.concurrent.Semaphore; import java.util.concurrent.atomic.AtomicLong; import or
2020-06-08 19:15:58
原创 JSON parse error: Cannot deserialize value of type `java.time.LocalDateTime
方案一 @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd HH:mm:ss") @JsonFormat(shape = JsonFormat.
2020-05-23 09:58:31
原创 Fedora31 Docker-ce group mountpoint does not exist: unknown.
方案一： $ sudo dnf install grubby $ sudo grubby --update-kernel=ALL --args="systemd.unified_cgroup_hierarchy=0" $ reboot
2020-05-21 16:21:09
原创 docker phpmyadmin訪問宿主服務器上的mysql
docker run --rm -e PMA_HOST=172.17.0.1 -e PMA_PORT=3306 -e PMA_USER=root -e PMA_PASSWORD=root -p 20001:80 phpmyadmin/p
2020-05-21 16:21:09