Tag: admin

Admin of machines, usually linux

Booting a McMyAdmin Server on Rackspace Public Cloud

Posted on by roaet

We’ll be using a Ubuntu 14.10 image. The size/flavor you choose depends on the amount of players that you want to support.

Synopsis

  • Make instance
  • Install stuff and run Minecraft in tmux

Process of Making a Rackspace Instance

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<wip>
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Installing the Base Packages

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# update all of our package lists
sudo apt-get update

# install utilities and java
# if openjdk-7-jre is not available use openjdk-6-jre
sudo apt-get -y install unzip python-software-properties \
openjdk-7-jre tmux

# create a user to run the server as and become them
sudo adduser minecraft
sudo su minecraft
cd ~

# get the config files for the server to work
cd /usr/local
sudo wget http://mcmyadmin.com/Downloads/etc.zip
sudo unzip etc.zip

# download mcmyadmin and unzip
wget http://mcmyadmin.com/Downloads/MCMA2_glibc25.zip
unzip MCMA2_glibc25.zip && rm MCMA2_glibc25.zip

# create our working directory
mkdir mcmyadmin
mv MCMA2_Linux_x86_64 mcmyadmin

# run the script with the admin password
# this will put you into blue(maybe) screen saying to
# complete setup with the web interface
./MCMA2_Linux_x86_64 -setpass A_Password_For_You

# You should now be able to log on to the web interface
# which is at http://YOUR_IP:8080
# I recommend setting your License if you have a McMyAdmin key
# You can find the License portion in About > Updates

# When done stop McMyAdmin by typing in the blue interface
/quit

# Then start it again and go to website to accept EULA
./MCMA2_Linux_x86_64

# Your new Minecraft server and world will be up now
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If you want to import a world

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# Stop the server from interface using /quit
# These instructions are from some other linux server to this one
# (this might take awhile, my world was 750 MB)
scp world_backup.tar minecraft@YOUR_IP:~

# remove the existing world
rm mcmyadmin/Minecraft/world -rf

# untar and mv the world folder into the Minecraft folder
tar -xvf world_backup.tar
mv world mcmyadmin/Minecraft/

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Running the Server in Tmux

[code lang=text]
# As the minecraft user:
tmux
cd ~/mcmyadmin
./MCMA2_Linux_x86_64
[/code]

How to use Agent Forwarding with sudo

Posted on by roaet

This is apparently a pretty common thing to do but I was unaware. It’s pretty simple once you know about it and I’m just blogging about it to remember:

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# SSH into the machine with the -A argument:

$ ssh -A user@host -p 314

# Once on the machine if you need to use sudo
# use the -E argument to save the environment:

$ sudo -E su
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Some concerns are that a clever person on the machine can use your credentials to do nefarious things.

This is useful for allowing you to use your ssh-keys (such as github, or SSHing into other machines using a key) from your local machine on remote machines.

You will need to ensure that your ssh config ~/.ssh/config contains (I put mine at the top) ForwardAgent yes for this to work.

Cheers