Install by docs from https://www.cherryservers.com/blog/install-jenkins-ubuntu

## Prepare installation

Открываю нужный сервер
```sh
wsl
```
```sh
sudo apt update
```
```sh
sudo apt upgrade
```
```sh
	sudo apt install openjdk-21-jdk openjdk-21-jre -y &&
	java -version
```
## Add Jenkins Repository

```sh
sudo wget -O /usr/share/keyrings/jenkins-keyring.asc https://pkg.jenkins.io/debian-stable/jenkins.io-2023.key
```
Next, add the Jenkins repository to your system’s sources.list:
```sh
sudo sh -c 'echo deb [signed-by=/usr/share/keyrings/jenkins-keyring.asc] https://pkg.jenkins.io/debian binary/ > /etc/apt/sources.list.d/jenkins.list'
```

```sh
sudo apt update
```

```sh
sudo apt install jenkins -y
```
If the software was installed incorrectly, you can reinstall it after uninstalling it first.:
```sh
sudo apt remove --purge jenkins
```

```sh
jenkins --version
```

Try run jenkins without service
```sh
sudo -u jenkins /usr/bin/jenkins --httpPort=8081 --httpListenAddress=0.0.0.0
```

```sh
sudo mcedit /lib/systemd/system/jenkins.service
```

```sh
sudo systemctl start jenkins &&
sudo systemctl enable jenkins &&
sudo systemctl status jenkins
```

```sh
sudo journalctl -xeu jenkins.service | tail -n 50
```
Если порт занят, проверяем кем:
```sh
sudo lsof -i :8081
```
Переопределяем порт:
```sh
sudo mcedit /etc/default/jenkins
```
```conf
HTTP_PORT=8081
```

```sh
sudo systemctl restart jenkins
```

```sh
start http://127.0.0.1:8081
```


See what port in locked
```sh
netstat -tpln
```