Brain's Workbench
Install ncftp client
Type the following apt-get command under Debian / Ubuntu Linux to install ncftp client, run:
$ sudo apt-get install ncftp
If you are RHEL / CentOS / Fedora Linux user, type the following yum command to install ncftp client (first turn on EPEL repo):
# yum install ncftp
Syntax and examples:
The syntax is as follows:
Command Line Tool
Most users will simply use the GUI to manage users. But there is also a full featured command line tool called pveum (short for “Proxmox VE User Manager”). Please note that all Proxmox VE command line tools are wrappers around the API, so you can also access those function through the REST API.
Here are some simple usage examples. To show help type:
pveum
or (to show detailed help about a specific command)
pveum help useradd
Create a new user:
pveum useradd testuser@pve -comment "Just a test"
Set or Change the password (not all realms support that):
pveum passwd testuser@pve
Disable a user:
pveum usermod testuser@pve -enable 0
Create a new group:
Once setting up the LAMP stack, you must be wondering to see that you no longer been able to login phpmyadmin using root credentials.
MySQL 5.7 changed the secure model: now MySQL root login requires a sudo (while the password still can be blank). I.e., phpMyAdmin will be not able to use root credentials.
The simplest (and safest) solution will be create a new user and grant required privileges.
1. Connect to mysql
sudo mysql --user=root mysql
2. Create a user for phpMyAdmin
Run the following commands (replacing some_pass by the desired password):
CREATE USER 'phpmyadmin'@'localhost' IDENTIFIED BY 'some_pass'; GRANT ALL PRIVILEGES ON *.* TO 'phpmyadmin'@'localhost' WITH GRANT OPTION; FLUSH PRIVILEGES;
If your phpMyAdmin is connecting to localhost, this should be enough.
First Check if NetworkManager is running on Ubuntu / Debian
Usually you should be using NetworkManager by default (Ubuntu 14.04), just in case you want to be sure, use this command to verify:
dpkg --get-selections | grep network-manager
In case there is some output like:
network-manager install
it is installed, if there is nothing returned, you are probably using a different network managing daemon. It would be possible that network manager is installed but inactive. Lets check if its running the hard way:
ps aux | grep network-manager
If thats returning something different than itself, you can be sure using the NetworkManager in Ubuntu / Debian.
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:
Exporting all addresses (mailboxes, aliases and distribution lists) is a vital tool if you have a backup MX and only want it to accept email for valid recipients. One reason for that is to stop spammers who simply use a dictionary of common names to generate recipient email addresses which would flood a backup MX with undeliverable email. Some anti-spam providers (e.g. Postini) have automatic provisioning processes for making this possible.
A naive process of extracting mailboxes looks like this:
/opt/zimbra/bin/zmaccts | grep 'active' | egrep -v '^\W+' | awk '{print $1}'
Unfortunately, this doesn’t give distribution lists and aliases, so a more sophisticated approach is necessary, for which there is no specific tool and requires using the ldap tool thus:
There are two main directives responsible for Nginx upstream timed out (110: Connection timed out) error:
proxy_read_timeout – Defines a timeout for reading a response from the proxied server. Default is 60 seconds.
location ~ ^/slow-proxy {
proxy_read_timeout 180; # <---
proxy_pass ...;
}
* you can use proxy_read_timeout inside http, server and location blocks.
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
Nginx can be configured as a load balancer to distribute incoming traffic around several backend servers. SSL termination is the process that occurs on the load balancer which handles the SSL encryption/decryption so that traffic between the load balancer and backend servers is in HTTP. The backends must be secured by restricting access to the load balancer’s IP, which is explained later in this article.
Prerequisites
In this tutorial the commands must be run as the root user or as a user with sudo privileges. You can see how to set that up in the Users Tutorial.
We need to set a FQDN hostname before we set up the mail server. On CentOS Linux, hostname is set in two files: Hostname setting:
nano /etc/sysconfig/network
# Part of file: /etc/sysconfig/network
HOSTNAME=demo.iredmail.org
Hostname <=> IP address mapping: /etc/hosts. WARNING: Please list the FQDN hostname as the first item.
# Part of file: /etc/hosts
127.0.0.1 demo.iredmail.org demo localhost localhost.localdomain
Verify the FQDN hostname with command ‘hostname -f’. If you change the hostname, please reboot the server to make it work.
Requirements
Metabase requires at least 1GB of RAM. All the required dependencies will be installed throughout the tutorial. You will need a minimal installation of CentOS 7 with root access on it. If you are logged in as a non-root user, you can run sudo -i to switch to root user.
Update Base System
Before installing any package it is recommended that you update the packages and repository using the following command.
yum -y update
Install Node.js
Node.js is required by Mailtrain as it is built using Nodemailer. Node.js is a very popular JavaScript runtime and Nodemailer is a module for Node.js applications to send emails.
Add Node.js 8.x repository:
curl --silent --location https://rpm.nodesource.com/setup_8.x | sudo bash -
Install Node.js.
yum -y install nodejs
Install MariaDB
To store Mailtrain database we will need to install MariaDB. MariaDB is a fork of MySQL
Install MariaDB repository into your system.