Remote server common commands

[DevShivmohan]

• Clone a repo onto the server if not available [Clone it inside a new folder] git clone <repo-url>

• Clone a specific branch git clone -b <branch-name> <repo-url>

• Pulling the updated code on the remote server git pull

• overwrite local conflicting changes made, before pulling git checkout <file-path-to-overwrite>

• To stop a service on a particular port

  • find the PID of the process running on the required port to stop sudo netstat -tulpn | grep LISTEN
  • kill the process using the above obtained PID kill -SIGKILL <PID>

• To start a spring-boot application

  • execute the below command on the root directory of project mvn spring-boot:run &
  • To detach the console screen Press: control + (A+D)
  • For gradle project run screen gradle bootRun

• Alternative approach to start spring-boot application execute the below command on the root directory of project, this will create the required jar in the /target folder mvn clean install execute the below command on the root directory of project, this will start the application java -jar <path-to-created-jar> & To detach the console screen Press: control + (A+D)

[DevShivmohan]

If server gives an error like this

• while run mvn spring-boot:run & command

then run command with sudo like this sudo mvn spring-boot:run & then this issue has been fixed.

[DevShivmohan]

Kill process with indentified port 8080 [Linux system]

private void killProcessViaPort(){
        try {
            String pid=null;
            Process process=Runtime.getRuntime().exec("netstat -ltnup | grep ':8080'");
            var scanner=new Scanner(process.getInputStream());
            while (scanner.hasNext()){
                var readline=scanner.nextLine();
                System.out.println(readline);
                if(readline.contains(":8080")){
                    StringBuilder stringBuilder=new StringBuilder();
                    for(char ch:readline.substring(readline.indexOf("LISTEN      "),readline.lastIndexOf("/java")).toCharArray())
                        if((""+ch).matches("[0-9]+"))
                            stringBuilder.append(ch);
                    pid=stringBuilder.toString();
                    scanner.close();
                    break;
                }
            }
            log.info("killing process with PID "+pid);
            if(pid!=null && !pid.isBlank()){
                process=Runtime.getRuntime().exec("kill -SIGKILL "+pid);
                process.waitFor();
                log.info("Process killed");
            }
        }catch (Exception e){
            e.printStackTrace();
        }
    }