Prevent Postfix Brute Force | An often used attack vector is brute forcing MTA logins. While most admins watch ssh auth logs like a hawk, email auth/login logs are most often not closely watched for this sort of thing if at all. I’ll show you one way to easily prevent a Postfix brute force attack! This how-to focuses on fail2ban
Linux Mint Debian Edition LMDE Review
Linux Mint Debian Edition LMDE Review | I have decided to give Linux Mint Debian Edition a go on my main desktop! Here is my quick minty-fresh brushed metal review. LMDE is Debian testing ever so slightly fine-tuned for the desktop. Elegance is the most apt (pun intended) word to describe LMDE. LMDE is 100% Debian compatible (uses regular Debian repositories), but
Enable FileVault in OS X
Enable FileVault in OS X | Mac OS X since 10.3 has had a feature called FileVault. FileVault as of Mac OS X 10.5 uses 256 bit AES to encrypt your home directory. This is particularly good if you use a laptop. If your laptop is stolen, the hard drive home directory contents are basically gibberish to someone if they attempt
Select Fastest Debian Mirror for apt-get
Select Fastest Debian Mirror for apt-get | With Debian you can easily auto-detect the fastest mirror for apt-get! First install this package: $ sudo apt-get install netselect-apt Then run the following, adjusting for your desired version. I’m using LMDE, so I’m going to run: $ sudo netselect-apt testing Other examples: sudo netselect-apt [stable|testing|unstable|experimental|release_codename|sid] This will query various debian mirrors then leave a
Privacy Inspector – Android
Privacy Inspector – Android | There is a great free Android app called Privacy Inspector which scans your apps to find out what they are doing with your phone’s information. Most of this sort of info is collected and sold to advertisers. In this example, I’ll scan the Engadget app to see what information it is snooping from my phone.
Compact VirtualBox Hard Disk .vdi
Compact VirtualBox Hard Disk .vdi | If you use VirtualBox ‘Dynamically Expanding’ disk images, you can also compact the image back down in size. This example shows how to shrink down a Windows virtual machine guest running on a Linux host. Step 1: Inside the Windows VM, defrag the hard drive. Go ahead and defrag even if it says a defrag
Detect Network Cable Link in Linux
Detect Network Cable Link in Linux | To check for the presence of a network link, use the command ethtool. For example, this checks eth0: # ethtool eth0 or $ sudo ethtool eth0 Look for a line which says ‘Link detected: yes / no’. The exact output may vary depending on your Linux distribution. Debian / Ubuntu looks like this: Red Hat
Bash Tips – Return to Previous Location
Bash Tips – Return to Previous Location | Ok this is a quick one, but useful! To return to the previous working directory, simply type: cd – and hit enter. Cool!
OS X: Files Skipping Trash And Deleting Immediately
OS X: Files Skipping Trash And Deleting Immediately | You may have seen this in OS X when trying to delete files: “This item will be deleted immediately. You can’t undo this action.” Deleting and recreating the .Trash directory will generally solve this. Here’s a quick guide! 1. Crack open a terminal: Applications > Utilities > Terminal 2. Next, remove the existing Trash directory
Batch Rename Files with rename
Batch Rename Files with rename | How can I batch rename files in Linux? There are tons of how-tos and guides on using sed, mv, and other commands to batch rename files. However, a very powerful tool available in Debian and Ubuntu Linux is simply rename. The rename command can be used to mass / bulk rename files, file extensions, rename