Linux Tutorials on the topic “debian”
Author: nagyorgy •
Tags: debian, linux, security •
It is a five minutes' exercise to increase security on an IPv4 addressed machine. The purpose of the setup described in this tutorial is to lock out port scanners and malicious port openers for a period of time.
Author: Neil Golden •
Tags: centos, debian, email, fedora, freebsd, linux, opensuse, server, suse, ubuntu •
If you have a Gmail account, you can configure your MTA to relay outgoing mail through Gmail. This gives you the benefit of Gmail's reliability and robust infrastructure, and provides you with a simple means of sending email from the command line. In this tutorial, we will use Postfix as our MTA. Postfix is a free, open-source, actively maintained, and highly secure mail transfer agent.
Author: Muhammad Arul •
Tags: debian, kvm, linux, server, virtualization •
Proxmox Virtual Environment or short Proxmox VE is an Open Source server virtualization software based on Debian Linux. In this tutorial, I will show you the installation of Proxmox on a server that runs a minimal Debian 8 installation, e.g. in a datacenter.
Author: Stephan Jau •
Tags: centos, debian, email, linux, opensuse, suse, ubuntu •
Spam is an annoyance and there's a multitude of ways to counteract it. However spammers also get smarter and try to bypass filters and stuff. In addition, ICANN has lately approved a great mean gTLDs (generic Top Level Domains), like .biz, .info etc. Some of those gTLDs are, in my opinion, exclusive used by spammers. Lately, I have gotten a lot of spam from the .xyz gTLD. So the question was, how to block email coming from such domains using that gTLD.
Author: Antonio Valencia •
Tags: debian, desktop, linux, server, ubuntu •
Author: Bill Toulas •
Tags: centos, debian, desktop, fedora, opensuse, suse, ubuntu •
Most modern GNU/Linux distributions use some kind of a software service that tracks the user activities and events. These events can be anything, from the opening of a document file, to the chat conversation. This isn't happening for the purpose to monitor the user and sell this usage data information to 3rd parties, but to help users enjoy a more user-friendly and unified experience across their applications. For example, if you want to quickly locate that document that you opened last weekend, chances are that you will easily and promptly find it after opening your file manager and going to the “Recent” folder.
Author: Croydon •
Tags: debian, linux, virtualization •
Quota support is an often requested feature in lxc. Linux filesystem quota is required when you want to give multiple users access to a container and want to control that one user is not using all the disk space. Quota is also required for web hosting servers, e.g. with ISPConfig 3, for the same reason: one website shall not be able to fill up the whole disk. This howto shows you, how you can use lxc with hard disk quota using qemu nbd with a qcow image file on Debian 8.
Author: Till Brehm •
Tags: centos, debian, fedora, linux, other, security, ubuntu •
Servers connected to the internet are seeing a constant level of attacks and scans all day. While a firewall and regular system updates are a good first defense to keep the system safe, you should also check regularly that no attacker got in. The tools described in this tutorial are made for these sanity checks, they scan for malware, viruses and rootkits.
Author: stefbon •
Tags: centos, debian, linux, networking, opensuse, shell, ubuntu •
Monitoring a directory for changes with Linux is possible through the well-known mechanism inotify. With inotify it's possible to set a watch on a directory, configure it to watch events on the contents, and you'll receive messages on a file descriptor when something happens. This works perfectly when the directory is on local storage, like a hard drive, SSD or a USB drive, But it is not sufficient when the directory is on a network filesystem when the storage is on another computer. Another user working in the same directory, connected via the same or another filesystem, can remove a file and the watch you've set on it will not get notified.
Author: Manh.Luong •
Tags: centos, debian, linux, security, ubuntu •
Listed below are the step by step procedures to reset the root password in different versions of CentOS, CoreOS, Debian, Ubuntu and FreeBSD. Begin this procedure by booting your server into single user mode.