How can I start a server which just shutdown - amazon-web-services

I am a junior for web design&server. ten minutes ago, I want to fix some problem with mysql on CentOS server, but I use a wrong command and I'm not discover:
shutdown -h now
now, this server is already shutdown...
I usually use ssh to connect, it doesn't work now.
I just have a few informations with this server...
it's user centOS 6.6 and it might be amazon-web-services, and i have ip, port, root password
is there any way that I can use to restart this server?
with this informations...
Thanks...

Go to your vps dashboard from your vps provider website. You can start OS from there.

Related

The error of Django application crashed ngnix and the server

My Django application run well for a while, then I got 502 Bad Gateway, after a few hours, I am unable to ping the domain and use SSH to connect my server(from Amazon Lightsail). My other application served by ngnix was also not available then. While if I didn't start the Django application, ther application served by ngnix would run steadily. So I guess it is the error of my Django application crashed ngnix and the server.
After rebooting the server for serveral times, the server seems recovered then I can ping the domain and use SSH to connect the server. But after a while, the same problem would occurs again. I wonder how to fix the problem.
Some diagnostic information since the start of the Django application to the end of the Nginx server provided below.
The RAM usage is high during the process.
The uwsgi log. https://bpa.st/FP7Q
The Nginx error log. https://bpa.st/35EQ

How can I troubleshoot PCs not seeing each other over my LAN

I'm a complete newbie when it comes to networking. I have two PCs on my LAN both running Manjaro. My main aim is to test functionality on a Django server running on one PC, from the other. I am running the Django server on the PC with ip address 192.168.1.138 using the command
python manage.py runserver 192.168.1.138:8000
and in settings.py
ALLOWED_HOSTS = ['localhost', '192.168.1.138']
I can ping 192.168.1.138 from the client PC, and ping the client PC from the server PC. But if I enter the ip address/port into the browser, it fails with
took too long to respond
I don't know if this a separate problem or a manifestation of the first, but when I run NitroShare, I am able to 'see' the PC running the Django server from the PC acting as the client, but if I try to transfer a file, again it times out. I am unable to see the client from the server in NitroShare.
Any suggestions or help gratefully received
Ensure you don't have a firewall running (or that it allows connections to port 8000). Manjaro's docs imply there might be no firewall by default, but in case there is, see https://wiki.manjaro.org/index.php?title=Firewalls
Set ALLOWED_HOSTS = ['*'], don't bother with limiting them.
Run with python manage.py runserver 0:8000 ; the 0 stands for 0.0.0.0, i.e. has the server listening on all network interfaces.
First I would scan with the other PC the open ports of you "Server"-PC, you can do that with tools like Nmap. Make sure you opened the ports of your "Server"-PC at your router interface. Another option could be the launching of the django app in a docker container. Here's the link of the official docker image at DockerHub:
https://hub.docker.com/_/django

Couldn't connect web socket client to websocket server on local host windows 10

I have an application signed for microsoft store which starts a web socket server on localhost (0.0.0.0:8081) on launching. Then I run python script with websocket client on the same host and try to connect to server (ws://127.0.0.1:8081) and it couldn't connect. But I can connect without any problems if I run this python script from another PC. Actually it works fine on local PC on another platforms: Win7, MacOS.
What i tried:
disabled windows firewall and defender
tried to add exception for application using CheckNetIsolation LoopbackExempt
tried to connect using different ip (0.0.0.0, 127.0.0.1, pc name)
It seems like I have to switch/set on/off some option for application or win10, but I can't find it
Thanks for help in advance
I found a solution https://learn.microsoft.com/en-us/windows/iot-core/develop-your-app/loopback
if you want to connect smth to win application on win 10 you should run
CheckNetIsolation.exe LoopbackExempt -is -n=your application
permanently
the best way to add it to start up menu

Is it possible to know, when running jetty server started?

I would like to know when my jetty server started.
is there any command/any other way, that can show, when the running jetty server started?
if you are start jetty from command line then sudo service jetty start will give you the starting time as well it will start the server or you can use sudo service jetty check to get the starting time of jetty server

Access Django App on AWS ec2 host

This issue might seem very trivial but please try to suggest a solution for this if possible.
I have deployed a django App on AWS ec2 host and I am able to run the following command successfully.
(venv)[ec2-user#ip-xxx-xx-xx-xx abc]$ python manage.py runserver
Performing system checks...
System check identified no issues (0 silenced).
January 03, 2016 - 13:15:31
Django version 1.7.1, using settings 'abc.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CONTROL-C.
But I am not able to access http://127.0.0.1:8000/ from the browser.
On googling it's suggesting to use nginx or gunicorn. I am not sure if nginx, gunicorn etc. are to be used for this.
Can someone please let me know how can this be accessed from browser ?
Thanks,
You need to open HTTP port in AWS instance menu.(all ports except ssh closed in AWS)
Go to your console.aws.amazon.com, then pick your instance and go to last menu item "security groups". It lauch wizard, click on "Inbound" in bottom menu, then "edit", and add HTTP or any port what you want :)
And be sure you using your public AWS IP, to open in browser
Add some screen for you, hope it help:
In order to archive this all you need to do 3 simple steps.
Go to the EC2 Console and open up the security group of your instance. go to inbound tab.
click Edit and then press add rule...add entry with type of Custom TCP Rule and port 8000..
Go to your Django project,your app and open up the settings.py script. List your IPv4 address in the allowed_hosts section.. Ex : ALLOWED_HOSTS=['public IPv4']'
Now in the console run command python manage.py runserver 0.0.0.0:8000...
Open any web browser(from any device) and open the link 'public IPv4':8000
No need any app servers like Apache, NginX..
#Baterson is right. You should open port 8000 for your server first.
Official document is here: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/authorizing-access-to-an-instance.html . It is highly detailed.