# Một số lệnh Linux mà tôi hay dùng

1. Dừng app đang chạy trên cổng 8080

```shell
sudo kill -9 `sudo lsof -t -i:8080`
```

2. Mở thu mục config nginx Ubuntu

```shell
cd /etc/nginx/sites-available
```

3. Restart nginx Ubuntu

```shell
sudo systemctl restart nginx
```

4. Đọc log

```shell
tail -f nohup.out
```

5. Đọc log service oci

```shell
journalctl -u oci -f
```

6. Mở toàn bộ port ubuntu iptables

```shell
sudo iptables -I INPUT -j ACCEPT
```

7. Tạo soft link nginx

```shell
sudo ln -s /etc/nginx/sites-available/example.conf /etc/nginx/sites-enabled/
```

8. Cấu hình run java on service

```shell
cd /etc/systemd/system
tạo file <nameservice>.service
================================
[Unit]
Description=oci_app
After=syslog.target
[Service]
WorkingDirectory=/usr/oci
ExecStart=java -jar oci-0.0.2.jar
SuccessExitStatus=143
Type=simple
ExecStop=/bin/kill -15 $MAINPID
[Install]
WantedBy=multi-user
```

9. Run/Stop service

```shell
sudo systemctl start oci
sudo systemctl stop oci
sudo systemctl status oci
```

10. Multi app nginx

```shell
server {
	listen ...;
	...
	location / {
		proxy_pass http://127.0.0.1:8080;
	}
	location /blog {
		rewrite ^/blog(.) /$1 break;
		proxy_pass http://127.0.0.1:8181;
	}
	location /mail {
		rewrite ^/mail(.) /$1 break;
		proxy_pass http://127.0.0.1:8282;
	}
}
```

11. Đổi tên file

```shell
mv [old_file_name] [new_file_name]
```

12. Khi tạo mới postgresql, mặc đinh user postgres ko có password. Sử dụng lệnh sau để tạo mật khẩu

```shell
sudo passwd postgres
```

<br>


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