Perfect FTP Server for Debian or Ubuntu

This installation was performed on a Ubuntu 14.04 distribution system.

While there are a variety of FTP server tools available for Linux, one of the most popular and mature options is vsftpd. Begin by SSHing into your server as root and use the apt-get command to install vsftpd:

apt-get update
apt-get install vsftpd
Reading package lists... Done
Building dependency tree
Reading state information... Done
[...]
The following NEW packages will be installed:
 vsftpd
0 upgraded, 1 newly installed, 0 to remove and 18 not upgraded.
Need to get 111 kB of archives.
After this operation, 361 kB of additional disk space will be used.
Get:1 http://mirrors.digitalocean.com/ubuntu/ trusty-updates/main vsftpd amd64 3.0.2-1ubuntu2.14.04.1 [111 kB]
Fetched 111 kB in 0s (231 kB/s)
Preconfiguring packages ...
Selecting previously unselected package vsftpd.
(Reading database ... 175600 files and directories currently installed.)
Preparing to unpack .../vsftpd_3.0.2-1ubuntu2.14.04.1_amd64.deb ...
Unpacking vsftpd (3.0.2-1ubuntu2.14.04.1) ...
Processing triggers for man-db (2.6.7.1-1) ...
Processing triggers for ureadahead (0.100.0-16) ...
Setting up vsftpd (3.0.2-1ubuntu2.14.04.1) ...
vsftpd start/running, process 18690
Processing triggers for ureadahead (0.100.0-16) ...

Configuration
The next step is to change any configuration settings for vsftpd. Open the /etc/vsftpd.conf file in your preferred text editor: Continue reading “Perfect FTP Server for Debian or Ubuntu” »

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Install Proxmox VE on Debian 9 – Stretch

The installation of a supported Proxmox VE server should be done via Bare-metal_ISO_Installer. In some case it makes sense to install Proxmox VE on top of a running Debian Stretch 64-bit, especially if you want a custom partition layout. For this HowTO the following Debian Stretch ISO was used:

Install a standard Debian Stretch (amd64)

Install a standard Debian Stretch, for details see Debian, and select a fixed IP. It is recommended to only install the “standard” package selection and nothing else, as Proxmox VE brings its own packages for qemu, lxc.

Add an /etc/hosts entry for your IP address
Please make sure that your hostname is resolvable via /etc/hosts, i.e you need an entry in /etc/hosts which assigns an IPv4 address to that hostname.

Note: Make sure that no IPv6 address for your hostname is specified in `/etc/hosts`

For instance if your IP address is 192.168.15.77, and your hostname prox4m1, then your /etc/hosts file should look like: Continue reading “Install Proxmox VE on Debian 9 – Stretch” »

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How to disable Network Manager on Linux

Disable Network Manager Completely

Here is how to disable Network Manager completely, so that Network Manager stops running on your Linux system.

To disable Network Manager on Debian 8 or later:

$ sudo systemctl stop NetworkManager.service
$ sudo systemctl disable NetworkManager.service

To disable Network Manager on Debian 7 or earlier:

$ sudo /etc/init.d/network-manager stop
$ sudo update-rc.d network-manager remove

To disable Network Manager on Ubuntu or Linux Mint: Continue reading “How to disable Network Manager on Linux” »

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Install Redis Server and PHP-Redis on Debian or Ubuntu System

you can install the phpredis extension from the Ubuntu respositories.

First, if you don’t have it installed already, let’s install Redis:

sudo apt-get install redis-server

After we get Redis installed (and/or verified that it was installed), we can install the PHP module for Redis:

sudo apt-get install php5-redis

After the module is done installing, you will want to restart your webserver and/or process manager (php-fpm, spawncgi, et cetera). Once you’ve restarted, you can check phpinfo() for a new section labeled Redis.

On Ubuntu 14.x System, you may try:

Install Redis 2.8.9

sudo apt-add-repository ppa:chris-lea/redis-server
sudo apt-get update
sudo apt-get install redis-server

Remove Redis 2.8.9

sudo apt-get purge--auto-remove redis-server
 

 

 

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Install Varnish on Debian 8

We are going to install the latest version of varnish which is 5.2 at the time of writing. In order to install the latest version, we have to download the source and compile it.  You have to install some dependencies to compile the Varnish:

apt-get install make automake autotools-dev libedit-dev libjemalloc-dev libncurses-dev libpcre3-dev libtool pkg-config python-docutils python-sphinx

Now you can download the Varnish from the repository:

wget https://varnish-cache.org/_downloads/varnish-5.2.1.tgz

You can also download and install other release from here:

https://varnish-cache.org/releases/index.html

Extract the “tar.gz” file with the command below:

tar xvzf varnish-5.*.tar.gz

Switch to the extracted directory and start compiling: Continue reading “Install Varnish on Debian 8” »

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Apache Virtual Hosts on Debian 8

Step 1 — Creating the Directory Structure

The first step that we are going to take is to make a directory structure that will hold the site data that we will be serving to visitors.

Our document root, the top-level directory that Apache looks at to find content to serve, will be set to individual directories under the /var/www directory. We will create a directory for each of the virtual hosts we’ll configure.

Within each of these directories, we’ll create a folder called public_html that will hold the web pages we want to serve. This gives us a little more flexibility in how we deploy more complex web applications in the future; the public_html folder will hold web content we want to serve, and the parent folder can hold scripts or application code to support web content.

Create the directories using the following commands:

sudo mkdir -p /var/www/example.com/public_html
sudo mkdir -p /var/www/test.com/public_html

Since we created the directories with sudo, they are owned by our root user. If we want our regular user to be able to modify files in our web directories, we change the ownership, like this: Continue reading “Apache Virtual Hosts on Debian 8” »

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stress test your web server with httperf

Httperf is a tool for measuring web server performance. It provides a flexible facility for generating various HTTP workloads and for measuring server performance.

NOTE : for accurate results, it’s best to run httperf from a remote machine and not from the localhost

to install httperf in red-hat based distributions (additional repo are needed. For centos you’ll need rpmforge, see here for installation)

yum install httperf

or in debian based

apt-get install httperf

An example of httperf stress test Continue reading “stress test your web server with httperf” »

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Enable root logins using ssh in Debian 8.0

By default you can no longer login using ssh as root with just a password since it is more secure to use a pre-shared key. However, you can you can still enable root logins using password authentication.

To do this you need to edit the ssh config file ‘/etc/ssh/sshd_config/sshd_config’ as root.

# vi /etc/ssh/sshd_config

Then find the entry in the Authentication section of the file that says ‘PermitRootLogin’ and change ‘without-password’ to ‘yes’. Continue reading “Enable root logins using ssh in Debian 8.0” »

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Add Linux machine on LibreNMS

Install SNMPD first

SNMPd is not installed by default. You must first install snmpd.

apt-get update
apt-get install snmpd lsb -y

Backup default snmp.conf file on the ‘/etc/snmp/’ directory and copy new one from the librenms directory.

mv /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.asli
cp /opt/librenms/snmpd.conf.example /etc/snmp/snmpd.conf

or instead copy-paste below snmpd text Continue reading “Add Linux machine on LibreNMS” »

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Perfect Backup MX using Postfix

This is quite simple, and with a very simple setup, and does not require that much, since we do not need to send out e-mails from clients from this server, or use ASMTP. I find that MySQL is not needed here, but could be used. I will use normal flat files, since the number of domains to run a backup for is most likely a rather small number. 

This setup can be editet to run all times of different checks, antivirus etc.  Normally you would make sure that the setup is exactly the same on both the primary MTA, and the backup. It hardenens the systems, and should reduce spam, and unwanted traffic. Create public DNS entries. Remember to create an MX record with an lower priority than the primary mail server, or else this will not work! 

Example:example.com. 43200 IN MX 10 mail.example.com.
example.com. 43200 IN MX 20 backup.example.com.

After this these two records are created with A records pointing to different IPs (different servers).  Continue reading “Perfect Backup MX using Postfix” »

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