brmlab user:yan

Default applications handling in archlinux

Anonymous (anonymous@undisclosed.example.com) — 2019-09-06T14:35:08+00:00

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	x-scheme-handler/https=firefox.desktop;		x-scheme-handler/https=firefox.desktop;
	text/html=firefox.desktop;		text/html=firefox.desktop;
-
-	[Added Associations]
	...		...
	</code>		</code>
		+
		+	===== mutt =====
		+	So far I did not fully understood communication between mutt and mimeapps.list, it interacts, but not fully (for example .pdf is recognized without any issue whereas excel files are having a hard time). Generally robust way how to link extensions with default apps is by using mailcap file as shown here: https://github.com/jelly/Dotfiles/blob/master/.mutt/mailcap (needs to be called in .muttrc) and described here: https://gitlab.com/muttmua/mutt/wikis/MuttFaq/Attachment

	===== changing default pdf viewer =====		===== changing default pdf viewer =====

Porting rpm/deb package into archlinux enviroment

Anonymous (anonymous@undisclosed.example.com) — 2018-04-30T05:02:42+00:00

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	===== Porting rpm/deb package into archlinux enviroment =====		===== Porting rpm/deb package into archlinux enviroment =====
-	For some software there is only a precompiled package available (usually the case of commercial ones - for example in the my case [[https://aur.archlinux.org/packages/mestrenova/\| this sw]]). But, the [[https://www.archlinux.org/\|Archlinux]] is not as widely used distribution as the rpm/deb packaging system based distributions. That means that the package for the Archlinux is sometimes unavailable as it is in my case. Luckily, it's not so hard to get a successful port of the package. I've performed a case-example of this on the [[http://mestrelab.com/software/mnova/\|MestReNova]] NMR software.	+	For some software there is only a precompiled package available (usually the case of commercial ones - for example in the my case [[https://aur.archlinux.org/packages/mestrenova/\| this sw]]). But, the [[https://www.archlinux.org/\|Archlinux]] is not as widely used distribution as the rpm/deb packaging system based distributions. This means that the package for the Archlinux is sometimes unavailable as it is in my case. Luckily, it's not so hard to get a successful port of the package. I've performed a case-example of this on the [[http://mestrelab.com/software/mnova/\|MestReNova]] NMR software.

	This method should be avoided when the source code is available. You should have some really good motive to undergo this. Keep in mind that this is not the cleanest and the safest way how to make a SW package.		This method should be avoided when the source code is available. You should have some really good motive to undergo this. Keep in mind that this is not the cleanest and the safest way how to make a SW package.

Bluetooth

Anonymous (anonymous@undisclosed.example.com) — 2017-05-20T14:35:07+00:00

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	* bluejacking, bluesnarfing etc - working on older devices which have bad implementation of BT protocol, or ommit some security measures. Usage is nicely explained on BT linux forum [[http://www.backtrack-linux.org/forums/showthread.php?t=5637&s=f59f4f7919b89e8c9d16773560795863\|6]]. They are probably useless for newer devices.		* bluejacking, bluesnarfing etc - working on older devices which have bad implementation of BT protocol, or ommit some security measures. Usage is nicely explained on BT linux forum [[http://www.backtrack-linux.org/forums/showthread.php?t=5637&s=f59f4f7919b89e8c9d16773560795863\|6]]. They are probably useless for newer devices.
	* HID attacks - those can be probably easiest to fruitify - basically you should be able to intercept BT keyboard in manner that you can send your own commands through this interface or you can take aquistion of communication.		* HID attacks - those can be probably easiest to fruitify - basically you should be able to intercept BT keyboard in manner that you can send your own commands through this interface or you can take aquistion of communication.
-	* carwhisperer - I have no idea how actual this SW really is, but people ussually change their mobile phone more often than their cars. It should be able to record communication in car or in opposite direction play some nice audio into vehicle.	+	* carwhisperer - I have no idea how actual this SW really is, but people ussually change their mobile phone more often than their cars. It should be able to record communication in car or in opposite direction play some nice audio in vehicle.

	===== sources =====		===== sources =====

Dell inspiron 5537 battery "feature"

Anonymous (anonymous@undisclosed.example.com) — 2017-07-08T20:54:14+00:00

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	+	====== Dell inspiron 5537 battery "feature" ======
	+	When Dell Power Manager is turned on, battery consumption on linux is almost on maximum - that means around 23W. When power manager is turned off, power consumption can be reduced (gpu turned off, wake on lan turned off, display brightness decreased, cpu clock speed reduced etc) to 10W. There is no linux power manager (but this applies to almost any notebook except few thinkpads).

	+	Battery died out after aprox. 2.5 year - after battery was disassembled it looked like in one serial pair of two batteries died. Problem was that it does not meant rapid capacity drop, but instead rendered battery completely unusable. It looks like it is normal lifespan of that battery type (many people report sudden death of their battery pack on 5537).
	+
	+	=== overall dell inspiron 5537 usage report ===
	+	* when display brightness is not on min or max there is some high frequency noise coming out of it, it is not loud, but in quiet enviroment it distracts attention
	+	* when I started to use this notebook as mobile after aprox 2 years display started flickering (connector for LVDS cable on display side - when pressure is applied flickering vanish), change of cable did not fix flickering - need to resolder connector or change for new LCD.
	+	* plastic chassis is not bad, but wont last long under heavy-duty usage. Be little gentle to it if you want it to last.

Installing newest possible/reasonable (3.4.3) python on windows XP

Anonymous (anonymous@undisclosed.example.com) — 2018-09-07T11:30:50+00:00

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	+	===== Installing newest possible/reasonable (3.4.3) python on windows XP =====
	+	Recently I needed to get running rather newer python code on old air-gapped windows PC. I did not found out any reasonable and non-outdated explanation how to do so, so I want to sum up my experience.
	+
	+	===== Target =====
	+	Newest [[https://matplotlib.org/\|matplotlib]] (that means 2.3.3 at time of the writing of the article)
	+	[[https://riverbankcomputing.com/software/pyqt/intro \| PyQt5]] support (I've found out this condition rather tough one, but I've managed)
	+	Minimal personal intervention during the installation and setting up process
	+
	+	===== Approach =====
	+	[[https://sourceforge.net/projects/winpython/files/WinPython_3.4/3.4.3.7/WinPython-32bit-3.4.3.7Qt5.exe/download \| WinPython-3.4.3.7Qt5 ]] - after this you got pretty much everything, however, the version of [[https://matplotlib.org/\|matplotlib]] was too old for my evil intentions.
	+	For that reason I needed to copy and then install these .whl packages:
	+	* [[https://files.pythonhosted.org/packages/1d/65/10ff40db250c84095363a3deb3e3fd9b7011597f9a45ff78ea2f05ecaa71/kiwisolver-1.0.1-cp34-none-win32.whl\| kiwisolver-1.0.1]]
	+	* [[https://files.pythonhosted.org/packages/f7/d2/e07d3ebb2bd7af696440ce7e754c59dd546ffe1bbe732c8ab68b9c834e61/cycler-0.10.0-py2.py3-none-any.whl \| cycler-0.10.0]]
	+	* [[https://files.pythonhosted.org/packages/5f/25/e52d3f31441505a5f3af41213346e5b6c221c9e086a166f3703d2ddaf940/pip-18.0-py2.py3-none-any.whl \| pip-18.0]]
	+	and then finally
	+	* [[https://files.pythonhosted.org/packages/f7/22/dd2a3f32ea8f2f970a6dc37c12da6d948c4f9bdb769d7a6f9bef635b8e8f/matplotlib-2.2.3-cp34-cp34m-win32.whl \| matplotlib-2.3.3]]
	+
	+	pip slightly mumbled during the update, but worked afterwards. Hope that this will be useful to someone someday or rather that nobody will need WinXP in the future.
	+
	+
	+

Amnesia virtual machine for browsing

Anonymous (anonymous@undisclosed.example.com) — 2017-02-21T04:41:13+00:00

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	====== Amnesia virtual machine for browsing ======		====== Amnesia virtual machine for browsing ======
-	As javascript features look more and more funny every new time, it looks like it would be wise to cut off browser from reach of internet, or from rest of the system - kernel, libraries, battery state information... On one hand browser in virtual is not safe (see [[user:jenda:linux-insecurity#remote_code_execution]] CVE's at bottom to get some insight), on the other it's probably still much safer than when it has access to the rest of the system. As HTTPS everywhere, ABP and NoScript started to be "must-have" Live-CD virtual variant is not an option, but perstistency means inherently also persistency of unwecomed [[https://en.wikipedia.org/wiki/Remote_administration_tool \| RATs]]. Those two antagonistic demands can be resolved, when machine could be run in "amnesic-mode" once (browsing) an than in "perstistive-mode" in another (fiddling noscript, updating) occasion.	+	As javascript features look more and [[https://www.vusec.net/projects/anc/\|more]] funny every new time, it looks like it would be wise to cut off browser from reach of internet, or from rest of the system - kernel, libraries, battery state information... On one hand browser in virtual is not safe (see [[user:jenda:linux-insecurity#remote_code_execution]] CVE's at bottom to get some insight), on the other it's probably still much safer than when it has access to the rest of the system. As HTTPS everywhere, ABP and NoScript started to be "must-have" Live-CD virtual variant is not an option, but perstistency means inherently also persistency of unwecomed [[https://en.wikipedia.org/wiki/Remote_administration_tool \| RATs]]. Those two antagonistic demands can be resolved, when machine could be run in "amnesic-mode" once (browsing) an than in "perstistive-mode" in another (fiddling noscript, updating) occasion.

	===== Setting up host =====		===== Setting up host =====