LinuxQuestions.org - linux-related notes

Just annotations of little "how to's", so I know I can find how to do something I've already done when I need to do it again, in case I don't remember anymore, which is not unlikely. Hopefully they can be useful to others, but I can't guarantee that it will work, or that it won't even make things worse.

Bash conversion of Opera sessions to "netscape standard" bookmarks

Posted 06-11-2014 at 03:34 AM by the dsc (linux-related notes)

Tags bookmarks, convert, opera, sessions

You run it on the session folder (.win files, usually on ~/.opera/sessions/), and it will generate a single html file with all the bookmarks (taken from the last visited URL for any given tab in that session, hence the file/variable "lasturl" -- the session files record some "history", but this isn't being exported/converted here), and coded "subfolders" for each session file, with the filenames as titles. Every time it runs it rewrites this generated html file....

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Restore some of chrome/ium performance by ditching extensions

Posted 06-05-2014 at 08:42 PM by the dsc (linux-related notes)
Updated 06-05-2014 at 08:44 PM by the dsc

It may be obvious at hindsight but took me a while to try it.

Chrome/ium already has the advantage of being able to enable/disable extensions without restart, so it's really a good practice, compared with Firefox. You can sometimes enable an extension just while you're using it.

I think the particular extension that was causing most of the slowness was/is Tampermonkey, which is sort of a scriptish/greasemonkey for Chrome. I think that there may be some bug with it because...

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Simple "at"-like script thingie to run other things at a given time

Posted 05-31-2014 at 01:00 PM by the dsc (linux-related notes)
Updated 05-31-2014 at 01:16 PM by the dsc (bad phrasing/grammar)

Tags lazyness

Code:

#!/bin/bash
now=$(date +%s)
then=$(date --date "$1" +%s)
sleep $((then-now))

I was just tired to try to figure the syntax and usage of "at", when I just wanted gxmessage to pop up to remind me of something.

Usage: "when 17:20 && gxmessage whatever or whatever you want to start at 17:20"

Change "when" to whatever name you wish to call it. Perhaps "by" is more grammatically...

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Possible key mechanism to disable xscreensaver automatically when watching youtube and the like

Posted 05-29-2014 at 08:07 PM by the dsc (linux-related notes)

Tags xscreensaver, youtube

I haven't even tried it yet, it just looks like a good candidate method to mess with eventually:

Code:

top p $mplayer_pid -bd 0.25 n 3 | grep $mplayer_pid | awk '{print $9}'

I saw it here:
https://forums.gentoo.org/viewtopic-...4-start-0.html

That would give "larger than zero" numbers when mplayer is playing (I think Debian's/current "top" syntax is a little bit different and requires "b" and "d" separated,...

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Liquorix kernel seems more responsive than Debian's default

Posted 05-28-2014 at 10:46 AM by the dsc (linux-related notes)

Tags kernel, liquorix

I'm somewhat skeptical of the tuned-kernel movement, so I didn't install it expecting to make my OS "fly" or anything. It just happened that recently there had been some weird kernel error messages ("perf samples too long"), and, related to that or not, the OS would become sluggish with lots of read-or-write activity (on my old HDD that must be really slow, to add to sluggishness). Apparently you can sort of solve it in a sysctl-like way, printing a "0" to some file/parameter,...

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