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These questions are about Linux in general -- NOT specific to a particular distribution. If the question just happens to be in a Linux environment, please specify your Linux distribution in the body of your question, but do NOT use the /linux tag.

1
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virtual memory into the actual memory pages (including swap). Let's see what man 5 proc tells us about it: /proc/[pid]/pagemap (since Linux 2.6.25) This file shows the mapping of each of the … RAM. 62 If set, the page is in swap space 61 (since Linux 3.5) The page is a file-mapped page or a shared anonymous page. 60-56 (since …
answered Jan 31 '17 by grochmal
11
votes
I'll go with the question in reverse order: Why are there so many? Those are devices that stand for most inputs present on a machine (there are others, a microphone for example will not be …
answered Jan 27 '17 by grochmal
3
votes
ln, on the other hand, will overwrite a file with a link to another file. Yet, you can be rather sure that a link to itself is a file that never ever had data (or was explicitly deleted before the creation of the soft link). (on Linux and using ln from coreutils, that is) …
answered Sep 10 '16 by grochmal
2
votes
For the sake of clarity I'm adding a more-or-less scripted test of what we talked about in the comments. This is on kernel 4.7.2 where the issue does not happen either: $ cd /dev/shm $ free …
answered Sep 14 '16 by grochmal
4
votes
PhantomJS respects fontconfig directories and even the old font.dir/font.scale postscript font configuration. For example I have and old Type 1 font: $ find ~/.fonts/Type1/ /home/grochmal/.fonts/Typ …
answered Aug 11 '16 by grochmal
19
votes
Do not set proxy_redirect to off, that is not doing what you think it is doing. proxy_redirect performs something similar to URL rewriting, for example: location /sales/ { proxy_pass http://ip_ …
answered Jun 20 '16 by grochmal
2
votes
are compiling it from source. Hell, you can even compile everything from scratch. The exception to the rule that a *BSD/Linux distro can be used as an effective desktop are embedded systems. Some … embedded systems purposely leave the C compiler out, so you cannot compile extra software. All that said, Kali Linux uses Debian repositories, from which you can get everything available on Debian …
answered Aug 30 '16 by grochmal
3
votes
There is nothing wrong with your VNC server. Why that happened Welcome to the other side of the internet! The side that is not behind a NAT and a firewall. vnc too many security failures simply …
answered Jun 9 '16 by grochmal
1
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NetworkManager, which uses a plugin system to support several types of VPNs. My knowledge on NetworkManger is on Arch Linux but OpenSUSE has documentation on using NetworkManager. Unfortunately …
answered Jul 28 '16 by grochmal
6
votes
Xorg is probably very difficult. But, I believe that an understanding of the concepts behind the evolution of fonts may prove a decent starting point. Disclaimer: I deal a lot with fonts on Linux, but … I never really needed to change Xorg code relating to fonts. The Arch Linux wiki has a lot of info on this too A bit of history Original UNIX fonts were simply bitmap fonts. Today these can be …
answered Jan 18 '17 by grochmal
6
votes
Background /proc and /sys filesystems are just a view of kernel structures, both filesystems reside in memory. Although both filesystems are writable (well, some of the files in there are writable) …
answered Jul 1 '16 by grochmal
2
votes
There isn't a way. From the UDEV perspective the partition uevents are sent directly from the kernel, there is no indirection. From the kernel side things happen from __blkdev_get() which will alway …
answered Oct 30 '16 by grochmal
0
votes
xmonad is non-reparenting and this causes issues with some applications. Moreover, the problem happens because the applications do not know that xmonad is a non-reparenting window manager. A common …
answered Jun 29 '16 by grochmal
2
votes
Most modern hard drives have their own controllers. It could really be whatever: A cache (in the disk controller) written into the actual storage Speed regulation to ensure that the disk spins at t …
answered Jul 31 '16 by grochmal
2
votes
Installation pacman -S extra/gnome installs a lot of things, including Xord and GDM. extra/gnome is a group of packages which you can select or deselect in pacman. But for a typical gnome install y …
answered Aug 24 '16 by grochmal

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