On-line Encrypted Backups for Your Laptop
Listing 4. Some EncFS Options and Their Results When Using OmniFS to Mount the On-line Storage
x, 1, 256, 4096, 2, R, n, R == OK x, 1, 256, 4096, 1, n, R, R == BAD x, 1, 256, 4096, 3, n, n, R == OK x, 1, 256, 4096, 3, R, n, R == OK
Some filesystem people dislike FUSE because of the extra context switches it can introduce. The use of two FUSE filesystems layered on top of each other, as shown in this article, means there is quite a bit of context switching going on in order actually to get data to the network. For the purposes of this article, the overhead of these context switches is irrelevant when compared to Internet connection speed.
Encrypting your home directory can give peace of mind in the event that your laptop is stolen. With on-line backups, you also are protected against losing your important changes along with your laptop or its crashing hard disk.
By using FUSE to expose the on-line storage as a filesystem, the encryption and synchronization can be left intact when you decide to change your on-line storage provider. The OmniFS filesystem uses HTTP to communicate with the on-line storage provider, so it should work even when your Internet connection has aggressive packet filtering.
“eCryptfs: a Stacked Cryptographic Filesystem” by Mike Halcrow, LJ, April 2007: www.linuxjournal.com/article/9400
Mounting eCryptfs as a Nonroot User: ecryptfs.sourceforge.net/ecryptfs-faq.html#nonroot
Openomy Storage Service: www.openomy.com
OpenomyFS: FUSE Filesystem for Openomy: mauricecodik.com/projects/ofs
GMailFS, Mount Your Gmail Account: richard.jones.name/google-hacks/gmail-filesystem/gmail-filesystem.html
FUSE: Filesystem in Userspace: fuse.sourceforge.net
Ruby FUSE Bindings: rubyforge.org/projects/fusefs
Create a Filesystem inside a Berkeley DB File: www.kernel.org/pub/linux/kernel/people/jgarzik/fs
Omnidrive, Free On-line Storage: www.omnidrive.com
OmniFS Home: users.tpg.com.au/panyam/omnifs.html
FUSE Filesytem for Mounting SSH: fuse.sourceforge.net/sshfs.html
EncFS FUSE Filesystem Home Page: arg0.net/wiki/encfs
Ben Martin has been working on filesystems for more than ten years. He is currently working toward a PhD combining Semantic Filesystems with Formal Concept Analysis to improve human-filesystem interaction.
Practical Task Scheduling Deployment
July 20, 2016 12:00 pm CDT
One of the best things about the UNIX environment (aside from being stable and efficient) is the vast array of software tools available to help you do your job. Traditionally, a UNIX tool does only one thing, but does that one thing very well. For example, grep is very easy to use and can search vast amounts of data quickly. The find tool can find a particular file or files based on all kinds of criteria. It's pretty easy to string these tools together to build even more powerful tools, such as a tool that finds all of the .log files in the /home directory and searches each one for a particular entry. This erector-set mentality allows UNIX system administrators to seem to always have the right tool for the job.
Cron traditionally has been considered another such a tool for job scheduling, but is it enough? This webinar considers that very question. The first part builds on a previous Geek Guide, Beyond Cron, and briefly describes how to know when it might be time to consider upgrading your job scheduling infrastructure. The second part presents an actual planning and implementation framework.
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With all the industry talk about the benefits of Linux on Power and all the performance advantages offered by its open architecture, you may be considering a move in that direction. If you are thinking about analytics, big data and cloud computing, you would be right to evaluate Power. The idea of using commodity x86 hardware and replacing it every three years is an outdated cost model. It doesn’t consider the total cost of ownership, and it doesn’t consider the advantage of real processing power, high-availability and multithreading like a demon.
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