Tech Tip: Save an Online Video with your Browser (no extensions needed)
Sometimes when you're watching online videos on youtube or other sites, you want to save some of them for later offline playback. You've probably heard of Firefox extensions like DownloadHeloper that can do this, but sometimes you may only have a bare version of Firefox, or perhaps a different browser, one that doesn't have a plugin for doing this. Using the tip below, you can save videos no matter what browser you're using.
First, find the browser process id:
$ ps xfa | grep firefox # or grep any other browsers' name
Say, we get 12279. Note that you may get more than one result from the above command: you need the process id of the binary executable. The firefox command, for instance, is normally a script which starts the real binary.Then, list its opened files, by:
$ ls -lU /proc/12279/fd
This will show you the files opened by the process, there may be a lot of them. The file name is the file descriptor number, it is a symbolic link that points to the real file that is opened on that file descriptor. The output will look something like:
# NAME REAL FILE lrwx------ 1 grp usr ... 59 -> socket: lrwx------ 1 grp usr ... 62 -> /home/gektop/.mozilla/firefox/u824gy5z.default/signons.sqlite lrwx------ 1 grp usr ... 70 -> /tmp/moz_media_cache (deleted) lrwx------ 1 grp usr ... 73 -> /home/gektop/.mozilla/firefox/u824gy5z.default/places.sqlite-journal lrwx------ 1 grp usr ... 74 -> /tmp/FlashZzxRDM lrwx------ 1 grp usr ... 75 -> /var/tmp/etilqs_5I5bzLh21aIoh4a (deleted)
Now look for names matching the pattern "/tmp/Flash??????". In the above example, we see /tmp/FlashZzxRDM. This is really a .flv file, you can open it with mplayer or any other video player and see that it is a video. If you see more than one file you may need to try playing them to see which one you're looking for.
The last step is to simply copy the file to your home directory, renaming it in the process (e.g. "jackson.flv"). Wait till after the browser has played the entire video, otherwise you may get an incomplete file.
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.
Join Linux Journal's Mike Diehl and Pat Cameron of Help Systems.
Free to Linux Journal readers.Register Now!
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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.
This ebook takes a look at some of the practical applications of the Linux on Power platform and ways you might bring all the performance power of this open architecture to bear for your organization. There are no smoke and mirrors here—just hard, cold, empirical evidence provided by independent sources. I also consider some innovative ways Linux on Power will be used in the future.Get the Guide