MongoDB 3.2 Bash Install Script

MongoDB 3.2 Bash Install Script

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The below script installs MongoDB 3.2.x on Debian. Copy and paste the script into a file called install_mongo.sh and execute it as root.

#!/bin/bash
set -e

echo "Installing repo"
apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv EA312927

echo "deb http://repo.mongodb.org/apt/debian wheezy/mongodb-org/3.2 main" > /etc/apt/sources.list.d/mongodb-org-3.2.list


echo "Installing binaries"
apt-get update
apt-get install -y mongodb-org
service mongod stop


echo "Setting up default settings"
rm -rf /var/lib/mongodb/*
cat > /etc/mongod.conf <<'EOF'
storage:
  dbPath: /var/lib/mongodb
  directoryPerDB: true
  journal:
    enabled: true
  engine: "wiredTiger"

systemLog:
  destination: file
  logAppend: true
  path: /var/log/mongodb/mongod.log

net:
  port: 27017
  bindIp: 0.0.0.0
  maxIncomingConnections: 100

replication:
  oplogSizeMB: 128
  replSetName: "rs1"

security:
  authorization: enabled

EOF

service mongod start
sleep 5

mongo admin <<'EOF'
use admin
rs.initiate()
exit
EOF

sleep 5

echo "Adding admin user"
mongo admin <<'EOF'
use admin
rs.initiate()
var user = {
  "user" : "admin",
  "pwd" : "admin",
  roles : [
      {
          "role" : "userAdminAnyDatabase",
          "db" : "admin"
      }
  ]
}
db.createUser(user);
exit
EOF

echo "Complete"

Then connect to the local MongoDB instance

mongo admin -u admin -p admin

MongoDB shell version: 3.2.7
connecting to: admin
rs1:PRIMARY>

 


Install Oracle Java In Debian/ Ubuntu using apt-get

Category : How-to

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java-logo

Oracle Java, due to Oracle’s license conditions, it quite a pain to install. The problem is that anyone who isn’t Oracle isn’t allowed to distribute the JDK binaries – they have to be downloaded strictly from Oracle. Luckily the guys over at webupd8team have been creative in this area and created and apt-get package that downloads the Java binaries from Oracle, presents the license agreement that you have to accept and and installs Java on the local machine.

Add Java Repository Using apt-add-repository on Ubuntu

We’ll use the apt-add-repository tool in this section to add the webupd8team’s ppa repository to our local apt package manager. This method should be used on Ubuntu – see the next section for Debian.

Before running the command, make sure you’ve got apt-add-repository installed as it’s often missing in the more minimal installations.

apt-get install software-properties-common

Older versions of Ubuntu (13.10 and older) would need a slightly different package:

apt-get install python-software-properties

Once you’ve got the package installed, go ahead and add the ppa Java repository and update your local apt cache with the new available packages.

apt-add-repository ppa:webupd8team/java
apt-get update

Add Java Repository Manually on Debian

If you’re using Debian or would like to manually add and maintain the list of repositories used by your apt installation then use the below commands.

echo "deb http://ppa.launchpad.net/webupd8team/java/ubuntu xenial main" | tee /etc/apt/sources.list.d/webupd8team-java.list
echo "deb-src http://ppa.launchpad.net/webupd8team/java/ubuntu xenial main" | tee -a /etc/apt/sources.list.d/webupd8team-java.list
apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys EEA14886
apt-get update

This will create a new file containing the repository location in /etc/apt/sources.list.d/webupd8team-java.list

 

Installing Oracle Java

When using this method, the first step of the install process is to download the Oracle Java binaries from Oracle.com. You’ll then need to accept the license agreement and then the installation will begin.

You can automatically accept the license agreement, which is useful when scripting the install where it’s impossible to interact with the process. The first command in the following sections instructs the install to automatically accept the license agreement. If you’d like to read and manually accept the agreement then do not run the first line.

Choose your Java version:

Install Java 7

For Oracle JDK7 use:

echo oracle-java7-installer shared/accepted-oracle-license-v1-1 select true | /usr/bin/debconf-set-selections
apt-get install oracle-java7-installer

Install Java 8

For Oracle JDK8 use:

echo oracle-java8-installer shared/accepted-oracle-license-v1-1 select true | /usr/bin/debconf-set-selections
apt-get install oracle-java8-installer

 

Java Variables

Finally, you can set the Java variables automatically using another package provided by the webupd8team. Upgrading, say from Java 7 to Java 8 will automatically remove the predecessors package.

apt-get install oracle-java7-set-default

Or

apt-get install oracle-java8-set-default

Scripted Install

See the following for copy and paste scripts for installing:


Proxmox 4.2 is now available

Category : Tech News

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proxmox logo gradA new version of Proxmox has been released building on the solid foundations laid down with the version 4 branch of Proxmox VE. The latest version 4.2 brings a new GUI, integration with Let’s Encrypt, updated packages and countless bug fixes.

You can download the ISO from https://www.proxmox.com/en/downloads/category/iso-images-pve

Highlights of the 4.2 release:

  • Based on Debian 8.4
  • New GUI using Sencha Ext JS 6
  • Let’s Encrypt support
  • Numerous LXC updates
    • Ability to add network rate limits
    • Add mount points via the GUI
    • Improved backups

Upgrade

Before updating, make sure all your VM’s have been stopped, both LXC and KVM. Ensure you have the required repository entries for apt-get. You’ll either need a valid license key or to add the less stable pve-no-subscription repository. See Proxmox 3.1 package/ updates manager (this also works for version 4.x) for more information.

Run the below commands on each server in your cluster.

apt-get update
apt-get dist-upgrade

Restart all Proxmox servers to complete the installation.


How To Proxy The Apt-Get Package Manager

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If you’re using Debian, Ubuntu, or any similar distribution which uses apt-get as it’s package manager and you’re behind a http proxy then you’re going to need to tell apt-get what your proxy settings are.

The way you tell apt-get what your proxy settings are is simple; set an environment variable and apt-get will pick it up and do the rest.

Set an environment variable called http_proxy and specify your http proxy server protocol (http or https), ip address and port. apt-get will then direct all of it’s fetch operations through the http proxy using the specified details. Use the following syntax to export the http_proxy variable and substitute IP and PORT for your proxy details.

export http_proxy=http://IP:PORT

For example, if your proxy uses the ip 10.10.10.10 and port 8080 then you’d write the following:

export http_proxy=http://10.10.10.10:8080

If your proxy requires user authentication then use the below syntax, substituting USER and PASSWORD for your proxy authentication details.

export http_proxy=http://USER:[email protected]:8080

You can also add this to your .bash_profile so that the variable is set each time you log in. Just remember to update your password if it ever changes!

vi ~/.bash_profile

How To Fix A Full /boot Partition on Linux

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full-boot-mountUtilities such as apt-get generally install kernel updates by adding the new kernel to the Linux boot list and set it as the default. This means that the next time the system boots, the new kernel will be loaded. The problem is that the old kernel is still there (just incase the new one doesn’t work, you’ve got a fall back!), and the kernel before that, and the kernel before that…

The current 3.x kernel for Ubuntu is around 20MB so it doesn’t take long for the kernel updates to fill a tiny 200-or-so-Mb boot partition where they are stored.

The good news is that it’s easy to clear out the old updates, but it’s important to not remove the latest one that you’re using.

Which Kernel am I Running?

It’s quick and easy to see which kernel version you are running. Use the uname command with the -a switch and pay attention to the version numbers reported.

uname -a
3.19.0-47-generic

This shows that you’re using version 3.19.0-47.

List Currently Installed Kernels

Next you’ll need to list the kernel packages that are currently installed so that you can remove any outdated ones to free up the space on the /boot partition.

Run the below dpkg command to list the installed kernel packages and their versions.

dpkg --list 'linux-image*'

dpkg-kernel-package-listThe above output shows several versions of kernel that are all taking up space on the /boot partition however we only really need the current running version given by the above uname -a command. It’s a good idea to keep the last 2 kernels just incase you notice an issue down the line, but the above list is quite excessive.

Remove Unused Kernel Packages to Free Space on /boot

Once you’ve identified your current kernel and the kernel packages you have installed it’s time to remove the ones you don’t need.

Using apt-get enter the package names of the kernel packages to remove.

apt-get remove linux-image-3.19.0-25-generic

If you get an error running this command then see the next section.

note: the above screenshot of the installed packages cropped the full version name – it’s missing the generic part. You can use tab completion with the apt-get command, or use an asterisk after the version number to remove the required package. 

Errors Removing Packages

If you get an error warning about dependencies similar to the below then you may need to manually remove a few kernel packages to free up some space.

[[email protected]:~] $apt-get remove linux-image-extra-3.19.0-25-generic
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies.
 linux-image-generic-lts-vivid : Depends: linux-image-3.19.0-49-generic but it is not going to be installed
                                 Depends: linux-image-extra-3.19.0-49-generic but it is not going to be installed
                                 Recommends: thermald but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

The problem here is that the original update failed to install the latest version of the kernel (version 3.19.0-49-generic in this case) and apt-get doesn’t like doing anything else until that problem has been resolved.

First we need to free up some space. Carefully delete 2 of the older kernel packages with a command similar to the below, but with old version numbers from your system returned by the above section List Currently Installed Kernels.

rm /boot/*-3.19.0-25*
rm /boot/*-3.19.0-33*

Check and double check this command because there’s no going back once it’s ran! It’s perfectly safe to do as long as you are using old version numbers that you’re no longer using.

You can now run apt-get to complete the original upgrade now that it has the space. This will remove the error when trying to remove the unused kernel packages in the above section.

apt-get install -f

Now go back to the above section and remove the old kernel packages that you no longer need.


Install Nginx on Debian/ Ubuntu

Category : How-to

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nginx-logoInstalling Nginx on Debian or Ubuntu is as easy as a single apt-get command, however it does not install the latest version of Nginx. In fact, the latest stable Nginx version is 1.8 and the latest package in Debian’s standard repository is 1.2

To get the latest stable version we need to add a new source to our package manager. Before doing so, add the Nginx PGP key which is used to sign all packages. Run the below commands to download the key from Nginx.com, add it to our package manager and clean up the local downloaded file.

wget http://nginx.org/keys/nginx_signing.key
apt-key add nginx_signing.key
rm nginx_signing.key

We can now create the new source file with the Nginx repository location.

vi /etc/apt/sources.list.d/nginx.list

Add one of the following depending on your Linux distribution. You will need to change wheezy or trusty to the codename of your distribution version.

Debian

deb http://nginx.org/packages/debian/ wheezy nginx
deb-src http://nginx.org/packages/debian/ wheezy nginx

Ubuntu

deb http://nginx.org/packages/ubuntu/ trusty nginx
deb-src http://nginx.org/packages/ubuntu/ trusty nginx

 

Finally, update your local repository cache and install Nginx.

apt-get update
apt-get install nginx

Run -v on nginx and you should see something like version 1.8.0.

nginx -v
nginx version: nginx/1.8.0

 


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