1. Spectacle
    • 화면 캡쳐 : 윈도우 픽픽 같음, 그놈 기본은 강조 표시 등 간단한 수정이 안되어 불편
  2. GIMP (GNU Image Manipulation Program, 그누 이미지 처리 프로그램)
    • 이미지 편집
  3. Shotcut
    • 동영상 편집
  4. Color Picker
    • 화면에서 RGB 색상 알아내기

Class에 선언되지 않은 필드 정보가 넘어옴(columns 필드 선언되지 않음)

org.jboss.resteasy.spi.ReaderException: com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "columns"

...
Caused by: com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "columns"

무시하려면

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;

@JsonIgnoreProperties(ignoreUnknown = true)
public class .....
## configmap
apiVersion: v1
kind: ConfigMap
metadata:
  name: test-cm
data:
  kube.config: |-
    # ~/.kube/config
    apiVersion: v1
    clusters:
...
      name: kubernetes
    contexts:

          command: ncp-iam-authenticator
  ncloud.config: |-
    # ~/.ncloud/configure
    [DEFAULT]
    ncloud_access_key_id = G
    ncloud_secret_access_key = d
    ncloud_api_url = https://n
    
    
    
    ## deployment
    spec:
  replicas: 1
  selector:
    matchLabels:
      app: test-app
  strategy:
    type: RollingUpdate
  template:
    metadata:
      labels:
        app: test-app
    spec:
      containers:
      - env:
      ...
        volumeMounts:
        - mountPath: /home/default/.kube/config
          name: kubeconfigcm
          subPath: kube.config
        - mountPath: /home/default/.ncloud/configure
          name: kubeconfigcm
          subPath: ncloud.config
          restartPolicy: Always
      volumes:
      - configMap:
          defaultMode: 420
          items:
          - key: kube.config
            path: kube.config
          - key: ncloud.config
            path: ncloud.config
          name: test-cm
        name: kubeconfigcm

 

build.gradle

    implementation ('org.springframework.boot:spring-boot-starter-jdbc') {
        exclude group: 'com.zaxxer', module: 'HikariCP'
    }
    implementation group: 'org.apache.commons', name: 'commons-dbcp2', version: '2.9.0'

application.yaml

 

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3380/testdb
    username: root
    password: test
    dbcp2:
      initial-size: 5
      max-total: 10
      test-while-idle: true
      time-between-eviction-runs-millis: 1000
      num-tests-per-eviction-run: 1

 

[Javascript]

// https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/rollups/aes.js
// https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/rollups/pbkdf2.js

var passphrase = "key...변경";
var iv = CryptoJS.lib.WordArray.random(128/8);
var key = CryptoJS.enc.Hex.parse(CryptoJS.SHA1(passphrase).toString().substring(0,32));
console.log("key: ", key)
var ct = CryptoJS.AES.encrypt(str, key, { iv: iv });
var enc = iv.concat(ct.ciphertext).toString();

console.log("enc: ", enc)
## enc:  b3ff8dd004bb643f0aba857baccb0d45e1565d2f4a1d727c9a268580d3a2031b

console.log("Result: " + CryptoJS.AES.decrypt({
        ciphertext: CryptoJS.enc.Hex.parse(enc.substring(32))
    }, CryptoJS.enc.Hex.parse(CryptoJS.SHA1(passphrase).toString().substring(0,32)),
    {
        iv: CryptoJS.enc.Hex.parse(enc.substring(0,32)),
    }).toString(CryptoJS.enc.Utf8));
    
## Result: abcd

enc = "B8160A9EDCA2CFECE3E6444BFDE09B780D8DD2D873B93080E7F5A6F4B5644217";
console.log("JAVA 에서 암호화한 문자열 복호화 Result: " + CryptoJS.AES.decrypt({
        ciphertext: CryptoJS.enc.Hex.parse(enc.substring(32))
    }, CryptoJS.enc.Hex.parse(CryptoJS.SHA1(passphrase).toString().substring(0,32)),
    {
        iv: CryptoJS.enc.Hex.parse(enc.substring(0,32)),
    }).toString(CryptoJS.enc.Utf8));
    
## JAVA 에서 암호화한 문자열 복호화 Result: abcd

[Java]

// com.google.guava:guava:29.0-jre


import com.google.common.base.Charsets;
import com.google.common.hash.Hashing;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import javax.xml.bind.DatatypeConverter;
import java.security.AlgorithmParameters;
import java.util.Arrays;

public class AesCryptUtil {
    private static Logger logger = LoggerFactory.getLogger(AesCryptUtil.class);

    public static String encryptAES(String data, String secretKey) {
        try {
            byte[] secretKeys = Arrays.copyOfRange(Hashing.sha1().hashString(secretKey, Charsets.UTF_8).asBytes(), 0, 16);
            SecretKey secret = new SecretKeySpec(secretKeys, "AES");

            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
            cipher.init(Cipher.ENCRYPT_MODE, secret);

            AlgorithmParameters params = cipher.getParameters();

            byte[] iv = params.getParameterSpec(IvParameterSpec.class).getIV();
            byte[] cipherText = cipher.doFinal(data.getBytes(Charsets.UTF_8));

            return DatatypeConverter.printHexBinary(iv) + DatatypeConverter.printHexBinary(cipherText);
        } catch (Exception e) {
            logger.error("===== exception", e);
            throw new RuntimeException(e);
        }
    }

    public static String decryptAES(String data, String secretKey) {
        try {
            byte[] secretKeys = Arrays.copyOfRange(Hashing.sha1().hashString(secretKey, Charsets.UTF_8).asBytes(), 0, 16);

            String hexedIv = data.substring(0, 32);

            String hexedCipherText = data.substring(32);

            byte[] iv = DatatypeConverter.parseHexBinary(hexedIv);
            byte[] cipherText = DatatypeConverter.parseHexBinary(hexedCipherText);

            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");

            cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(secretKeys, "AES"), new IvParameterSpec(iv));

            return new String(cipher.doFinal(cipherText), Charsets.UTF_8);
        }catch (Exception e) {
            logger.error("===== exception", e);
            throw new RuntimeException(e);
        }
    }

    public static void main(String[] args) throws Exception {
        String key = "key...변경";


        String abcd = AesCryptUtil.encryptAES("abcd", key);
        System.out.println("enc: " + abcd);
        System.out.println("dec: " + AesCryptUtil.decryptAES(abcd, key));
        System.out.println("javascript 암호화한 문자열 복호화 dec: " + AesCryptUtil.decryptAES("b3ff8dd004bb643f0aba857baccb0d45e1565d2f4a1d727c9a268580d3a2031b", key));
    }
}

[참고] https://stackoverflow.com/questions/37368710/decrypt-aes-cbc-pkcs5padding-with-cryptojs

 

Decrypt AES/CBC/PKCS5Padding with CryptoJS

I generate 128bit AES/CBC/PKCS5Padding key using Java javax.crypto API. Here is the algorithm that I use: public static String encryptAES(String data, String secretKey) { try { byte[]

stackoverflow.com

 

 

환경

  • Fedora 37
  • GHOME 43.2
  • RDP 서버

현상

GUI 화면이 잠겨 있는 상황에서는 RDP Client 에서 접속 안됨

Failed to start remote desktop session: GDBus.Error:org.freedesktop.DBus.Error.AccessDenied: Session creation inhibited

해결 방법

Gnome Extensions > Allow Locked Remote Desktop 설치

https://extensions.gnome.org/extension/4338/allow-locked-remote-desktop/

 

아래 안 되는듯

Alt+F2, type lg

global.backend.get_remote_access_controller().uninhibit_remote_access = () => {}

 

2023.08 Chrome 한글 전환 이슈 등등 이슈

Google Chrome 사이트에서 RPM 다운로드 받지 않고, Fedora Repository에 있는 Chrome 설치하면 아무 문제 없네;;

 

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

 

2023부터 네이버 웨일로 바꿔 사용 중.. 위 문제들 없이 좋은거 같음

(deb를 rpm으로 변환해서 설치)

 

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

 

36 버전 사용 중 업데이트 시 또는 37 버전 에서 Chrome 렌더링 이슈 생김.. 깜빡깜빡.. 한 참 뒤에 열리기는 함..

 

열리면 chrome://flags 들어가서 Vulkan Disabled

비디오 하드웨어 디코딩 성능 관련 옵션으로 보임

 

[확인] https://forum.babylonjs.com/t/performance-and-rendering-issues-since-fedora-37-upgrade/35739

 

Performance and rendering issues since Fedora 37 upgrade

I upgraded to Fedora 37 and now all Babylon-related rendering is flickering (with a bright interframe) and the browser seems to be struggling because of high CPU load. Almost any other WebGL(2) content is rendering just as before (e.g. three.js-based). I t

forum.babylonjs.com

Wayland, X11 옵션 선택

chrome://flags/#ozone-platform-hint

 

 

import org.apache.commons.codec.DecoderException;
import org.apache.commons.codec.binary.Hex;

public class Test {
    public static void main(String[] args) {
        String hexString = "123 abc [0xea][0xb0][0x80][0xeb][0x82][0x98] [0xeb][0x8b][0xa4][0xeb][0x9d][0xbc]";
        do {
            hexString = hexToString(hexString); // output : 123 abc 가나 다라
        } while (hexString.indexOf("[0x") > -1);
        System.out.println("en : " + hexString);
    }
    
    private static String hexToString(String s) {
        try {
            int idx = s.indexOf("[0x");
            if (idx > -1) {
                String t = s.substring(idx, idx + 18);
                String c = new String(Hex.decodeHex(t.replaceAll("\\[0x", "").replaceAll("\\]", "").toCharArray()));
                s = s.replace(t, c);
            }
        } catch (DecoderException e) {
            throw new RuntimeException(e);
        }

        return s;
    }
}
groupadd -g 200 nexus
useradd -g 200 -u 200 nexus

yum install -y podman java-1.8.0-openjdk-devel.x86_64

mkdir /data/nexus2-data

podman load -i docker_image_nexus_2.15.1-02.tar
podman run -d -p 8088:8081 --name nexus2 -v /data/nexus2-data:/sonatype-work --privileged=true registry.hub.docker.com/sonatype/nexus:2.15.1-02
podman logs -f $(podman ps -a -q -f name=nexus2)
#podman rm --force $(podman ps -a -q -f name=nexus2)

mkdir /root/.m2
cat << EOF > /root/.m2/settings.xml
<settings>
  <mirrors>
    <mirror>
      <id>nexus</id>
      <mirrorOf>*</mirrorOf>
      <url>http://localhost:8088/nexus/content/groups/public</url>
    </mirror>
  </mirrors>
</settings>
EOF

https://extensions.gnome.org/#

  • Dash to Panel
    • 실행한 창이 하단 TaskBar 에 표시
    • 빠른 단축 아이콘 설정
    • 설치 에러 시 42.46 버전 설치(Fedora 37 에서..)
  • Window List
    • 실행한 창이 하단 TaskBar 에 표시(Dash To Panel 사용하기 전에 사용 했었음)
  • Launch new instance
    • 실행 아이콘을 클랙 했을때 새로운 창이 열림(예로 브라우저 클릭 시 이미 실행 되어 있을때도 빈 창이 열림)
  • Applications Menu
    • 메뉴에 프로그램 드롭다운 버튼 생김
  • Places Status Indicator
    • 메뉴에 탐색기의 기본 메뉴 처럼 드롭다운 버튼 생김
  • Extenstion List
    • 메뉴에 확장 드롭다운 버튼 생김
  • Allow Locked Remote Desktop
    • 화면 잠금 시에도 원격 RDP 접속 허용

 

 

 

 

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