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‘When you are forwarding ports through a tunnel, either locally or remotely (i.e., with the -L or -R switches), you can modify the session real-time. The way that you do this is after you start the session, you press SHIFT + ` + c (The ` key also has a ~ in it, which is the actual keypress sent to the session). If it doesn’t work the first time, press ENTER a couple of times and try it again. Once you get the “ssh>” prompt, type “?” for the commands you can put in. Here’s an example session:

‘Getting the right cropping values using GIMP

In 5 steps:
Where to find the cropping values
1. Open up GIMP.
2. Open one of the images in GIMP.
3. Using the Rectangle Select Tool (hotkey “R”), select the area you want to be cropped.
4. Note the X, Y, Width and Height values GIMP gives you (have a look at the picture, you can find them in the GIMP main window).
5. Close GIMP (or leave it open if you plan to use it again soon).

‘Let’s have a look at a rather simple mencoder command that should create a WMP-compatible MPEG file:

[rechosen@localhost ~]$ mencoder
-oac lavc -ovc lavc -lavcopts acodec=mp2:vcodec=mpeg2video:mbd=1:vbitrate=1800 -of mpeg -o

Replace “
” with the video source (for example a file or a DVD scene) and “” with the file you want the output to be written to (e.g. “samplemovie.mpg” or “dvdbackup.mpeg”). You can also replace the value after “vbitrate=” with a higher or lower bitrate, depending on the desired quality of the outputfile (you could also leave it away entirely, but it will then default to 800, which is quite low and therefore pretty much only suitable for very low resolution movies).

‘If you use bash for scripting you will undoubtedly have to use conditions a lot, for example for an if … then construct or a while loop. The syntax of these conditions can seem a bit daunting to learn and use. This tutorial aims to help the reader understanding conditions in bash, and provides a comprehensive list of the possibilities. A small amount of general shell knowledge is assumed.

Difficulty: Basic – Medium
Introduction

Bash features a lot of built-in checks and comparisons, coming in quite handy in many situations. You’ve probably seen if statements like the following before:

‘System administration command. This simple backup utility accesses ext2 and ext3 file devices directly, quickly backing up files without affecting file access times. files may be specified as a mount point or as a list of files and directories to back up. While you can use this on a mounted system, dump may write corrupted information to the backup when the kernel has written only part of its cached information. Dump maintains a record of which files it has saved in /etc/dumpdates, and will perform incremental backups after creating an initial full backup. Use the restore command to restore a dump backup.
Options
-a

‘Last year Vector Linux came in four flavors. The list has now been expanded to seven different variations on the distribution: Standard, Deluxe, SOHO, Live, Light, Mini, and Light Live. SOHO, with KDE as the default desktop and all the most popular applications, is the full featured version. Standard is based on the Xfce4 desktop and provides superior speed and performance. Both are freely downloadable. Deluxe, available for purchase, is Standard plus a second CD with additional applications including KDE and OpenOffice. Live, as the name implies, is a live CD version of Standard. Light is a paired down, extremely lightweight version designed to run on older systems with as little as 64MB of RAM. In reality it will run with less than that. Light is built around either a JWM or Fluxbox desktop and lightweight applications. Mini is a further reduced version of Light that fits on a 5cm/3″ mini CD and requires only 1.1GB of disk space. Finally, Light Live is, as you’d expect, the live CD version of Light. So far only new Standard and Deluxe versions have been released but the others, all in various stages of development and testing, can already be sampled. This review will stick strictly with the Standard version from here on out.

‘A few weeks ago a new version of RSSTail came out. After reading the RSSTail page I found out that you can use RSSTail as a plugin to a fantastic application called multitaill. That is when I realized that multitail is actually written by the same person.

‘Researchers at Sophos discovered that Apple updated the anti-malware protection built-into Mac OS X when it released a new version earlier this week.

Mac OS X 10.6.4 has been updated to provide limited protection against OSX/Pinhead-B (called HellRTS by Apple), a backdoor Trojan which can allow remote hackers to gain control over Mac computers for the purposes of identity theft, spying and the distribution of spam.

This malware was distributed disguised as the iPhoto application by malicious hackers.

Sophos researchers discovered that Apple updated a file called XProtect.plist – the file that contains elementary signatures of a handful of Mac threats – to detect HellRTS.

‘Facebook, Twitter and Skype are Internet behemoths, counting hundreds of millions users each, so it is not surprising that many malicious email campaigns masquerade as legitimate notices coming from these three sources.

The number of emails that try to trick recipients into downloading malicious files has surged in the last few days. Users are notified that their Twitter or Facebook password has been reset, that they should check details of purchases effected through Skype, that they have messages waiting for them, etc.