HW and SW threats: how to block?
by home user
Good afternoon,
background:
In the past few months, I've seen a few articles on the internet about coin mining, also called cryptojacking. Seems that in a variety of ways, software can be loaded onto remote computers and then run to mine crypto-currency, often without the user knowing it. This is done to make money, sometimes for good purposes, but sometimes for malicious people or organizations. The running of most such scripts is barely noticeable (deliberately!), but some can take up so much cpu and/or gpu so as to fry the processors (by overheating them).
question:
I realize there's no perfect protection. But based on the knowledge and experience of the members of this list, which of the coin-mining blockers available for Firefox is best (most effective)?
thanks,
Bill.
6 years
Program won't start
by Jonathan Ryshpan
Seagate's SeaTools for Linux won't start on my system. The file is
rather old and in a funky format, but it looks like it ought to
run. Nevertheless, it won't run. Can anyone tell me what's goi
ng on? Here's what happens:
$ ls -l st-rwxr-xr-x. 1 jonrysh jonrysh 180149 Sep 12 2001 st
$ file st
st: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV),
dynamically linked, interpreter /lib/ld-linux.so.2, for GNU/Linux
2.2.5, not stripped
$ st
bash: ./st: No such file or directory
$ strace st
execve("./st", ["st"], 0x7ffc80690900 /* 76 vars */) = -1 ENOENT (No
such file or directory)
open("/usr/share/locale/locale.alias", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=2997, ...}) = 0
read(3, "# Locale name alias data base.\n#"..., 4096) = 2997
read(3, "", 4096) = 0
close(3) = 0
open("/usr/share/locale/en_US.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) =
-1 ENOENT (No such file or directory)
open("/usr/share/locale/en_US.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1
ENOENT (No such file or directory)
open("/usr/share/locale/en_US/LC_MESSAGES/libc.mo", O_RDONLY) = -1
ENOENT (No such file or directory)
open("/usr/share/locale/en.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1
ENOENT (No such file or directory)
open("/usr/share/locale/en.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1
ENOENT (No such file or directory)
open("/usr/share/locale/en/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT
(No such file or directory)
fstat(2, {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 4), ...}) = 0
write(2, "strace: exec: No such file or di"..., 40strace: exec: No such
file or directory
) = 40
getpid() = 18983
exit_group(1) = ?
+++ exited with 1 +++
6 years
Windows eats Fedora installation USB stick
by D. Hugh Redelmeier
Sometimes when I try to install Fedora, Windows eats my installation
USB stick.
Fedora is distributed as a .iso (a CD/DVD image). This image is cleverly
designed such that if you dump it, byte for byte, onto a USB stick (not
into a filesystem), you get a stick that can be booted.
I install by booting this disk, usually in UEFI mode.
But sometimes the firmware escapes me and Windows is booted. For example,
if I am not quick enough typing ESC / DEL / F12 / whatever to steer the
firmware to boot the USB stick.
When that happens, Windows always seems to damage the image on the USB
stick. What the heck is up with that?
When I boot the installation stick, I always choose the option to
check the contents before booting Fedora. I do this because the
Windows damage is unannounced.
I just had it happen again. Here's the damage, as found by cmp(1). I
haven't worked hard at analyzing what it is but every changed byte
started out as zero. The new bytes don't smell like ASCII (but I'm
not great at recognizing ASCII in decimal).
Any idea why Windows makes this unprovoked attack on installation
sticks? It sure is inconvenient.
Since Microsoft is unlikely to fix this Windows bug, would it be
worthwhile for Fedora to take countermeasures? For example, ignore
exactly those bytes that Windows damages?
$ sudo cmp -l Fedora-Workstation-Live-x86_64-28_Beta-1.3.iso /dev/sdg
61462533 0 377
61462534 0 377
61471313 0 377
61471314 0 377
61471315 0 377
61471316 0 377
61472773 0 377
61472774 0 377
61481553 0 377
61481554 0 377
61481555 0 377
61481556 0 377
61483073 0 102
61483074 0 40
61483076 0 111
61483078 0 156
61483080 0 146
61483082 0 157
61483084 0 17
61483086 0 162
61483087 0 162
61483089 0 155
61483091 0 141
61483093 0 164
61483095 0 151
61483097 0 157
61483101 0 156
61483105 0 1
61483106 0 123
61483108 0 171
61483110 0 163
61483112 0 164
61483114 0 145
61483116 0 17
61483118 0 162
61483119 0 155
61483121 0 40
61483123 0 126
61483125 0 157
61483127 0 154
61483129 0 165
61483133 0 155
61483135 0 145
61483137 0 123
61483138 0 131
61483139 0 123
61483140 0 124
61483141 0 105
61483142 0 115
61483143 0 176
61483144 0 61
61483145 0 40
61483146 0 40
61483147 0 40
61483148 0 26
61483150 0 103
61483151 0 223
61483152 0 142
61483153 0 215
61483154 0 114
61483155 0 215
61483156 0 114
61483159 0 224
61483160 0 142
61483161 0 215
61483162 0 114
61483163 0 2
61499393 0 56
61499394 0 40
61499395 0 40
61499396 0 40
61499397 0 40
61499398 0 40
61499399 0 40
61499400 0 40
61499401 0 40
61499402 0 40
61499403 0 40
61499404 0 20
61499406 0 103
61499407 0 223
61499408 0 142
61499409 0 215
61499410 0 114
61499411 0 215
61499412 0 114
61499415 0 224
61499416 0 142
61499417 0 215
61499418 0 114
61499419 0 2
61499425 0 56
61499426 0 56
61499427 0 40
61499428 0 40
61499429 0 40
61499430 0 40
61499431 0 40
61499432 0 40
61499433 0 40
61499434 0 40
61499435 0 40
61499436 0 20
61499438 0 103
61499439 0 223
61499440 0 142
61499441 0 215
61499442 0 114
61499443 0 215
61499444 0 114
61499447 0 224
61499448 0 142
61499449 0 215
61499450 0 114
61499457 0 102
61499458 0 107
61499460 0 165
61499462 0 151
61499464 0 144
61499468 0 17
61499470 0 377
61499471 0 377
61499472 0 377
61499473 0 377
61499474 0 377
61499475 0 377
61499476 0 377
61499477 0 377
61499478 0 377
61499479 0 377
61499480 0 377
61499481 0 377
61499482 0 377
61499485 0 377
61499486 0 377
61499487 0 377
61499488 0 377
61499489 0 1
61499490 0 111
61499492 0 156
61499494 0 144
61499496 0 145
61499498 0 170
61499500 0 17
61499502 0 377
61499503 0 145
61499505 0 162
61499507 0 126
61499509 0 157
61499511 0 154
61499513 0 165
61499517 0 155
61499519 0 145
61499521 0 111
61499522 0 116
61499523 0 104
61499524 0 105
61499525 0 130
61499526 0 105
61499527 0 176
61499528 0 61
61499529 0 40
61499530 0 40
61499531 0 40
61499532 0 40
61499534 0 104
61499535 0 223
61499536 0 142
61499537 0 215
61499538 0 114
61499539 0 215
61499540 0 114
61499543 0 224
61499544 0 142
61499545 0 215
61499546 0 114
61499547 0 50
61499548 0 21
61499549 0 114
61499553 0 102
61499554 0 164
61499558 0 377
61499559 0 377
61499560 0 377
61499561 0 377
61499562 0 377
61499563 0 377
61499564 0 17
61499566 0 316
61499567 0 377
61499568 0 377
61499569 0 377
61499570 0 377
61499571 0 377
61499572 0 377
61499573 0 377
61499574 0 377
61499575 0 377
61499576 0 377
61499577 0 377
61499578 0 377
61499581 0 377
61499582 0 377
61499583 0 377
61499584 0 377
61499585 0 1
61499586 0 127
61499588 0 120
61499590 0 123
61499592 0 145
61499594 0 164
61499596 0 17
61499598 0 316
61499599 0 164
61499601 0 151
61499603 0 156
61499605 0 147
61499607 0 163
61499609 0 56
61499613 0 144
61499615 0 141
61499617 0 127
61499618 0 120
61499619 0 123
61499620 0 105
61499621 0 124
61499622 0 124
61499623 0 176
61499624 0 61
61499625 0 104
61499626 0 101
61499627 0 124
61499628 0 40
61499630 0 106
61499631 0 223
61499632 0 142
61499633 0 215
61499634 0 114
61499635 0 215
61499636 0 114
61499639 0 224
61499640 0 142
61499641 0 215
61499642 0 114
61499643 0 51
61499644 0 21
61499645 0 14
70490113 0 173
70490115 0 71
70490117 0 101
70490119 0 67
70490121 0 64
70490123 0 105
70490125 0 106
70490127 0 67
70490129 0 70
70490131 0 55
70490133 0 104
70490135 0 63
70490137 0 104
70490139 0 61
70490141 0 55
70490143 0 64
70490145 0 64
70490147 0 64
70490149 0 102
70490151 0 55
70490153 0 71
70490155 0 64
70490157 0 60
70490159 0 61
70490161 0 55
70490163 0 103
70490165 0 66
70490167 0 104
70490169 0 70
70490171 0 64
70490173 0 60
70490175 0 71
70490177 0 102
70490179 0 71
70490181 0 60
70490183 0 67
70490185 0 105
70490187 0 175
70492161 0 14
70492165 0 137
70492166 0 344
70492167 0 351
70492168 0 77
70492169 0 207
70492170 0 144
70492171 0 2
70492172 0 305
cmp: EOF on Fedora-Workstation-Live-x86_64-28_Beta-1.3.iso after byte 1933574144
6 years
SD slot errors
by D. Hugh Redelmeier
I've just installed F28 beta on my Cube Mix Plus tablet. It seems to
work but a sequence of messages keep showing up in the dmesg
outputnevery 10 seconds.
[ 537.896013] mmc1: Timeout waiting for hardware cmd interrupt.
[ 537.896023] mmc1: sdhci: ============ SDHCI REGISTER DUMP ===========
[ 537.896037] mmc1: sdhci: Sys addr: 0x00000000 | Version: 0x00001002
[ 537.896048] mmc1: sdhci: Blk size: 0x00000000 | Blk cnt: 0x00000000
[ 537.896053] mmc1: sdhci: Argument: 0x00000000 | Trn mode: 0x00000000
[ 537.896059] mmc1: sdhci: Present: 0x000a0001 | Host ctl: 0x00000001
[ 537.896065] mmc1: sdhci: Power: 0x0000000e | Blk gap: 0x00000080
[ 537.896070] mmc1: sdhci: Wake-up: 0x00000000 | Clock: 0x0000e8c7
[ 537.896075] mmc1: sdhci: Timeout: 0x00000000 | Int stat: 0x00000000
[ 537.896081] mmc1: sdhci: Int enab: 0x00ff0043 | Sig enab: 0x00ff0043
[ 537.896086] mmc1: sdhci: AC12 err: 0x00000000 | Slot int: 0x00000000
[ 537.896092] mmc1: sdhci: Caps: 0x7568c881 | Caps_1: 0x00000807
[ 537.896097] mmc1: sdhci: Cmd: 0x00000102 | Max curr: 0x00000000
[ 537.896103] mmc1: sdhci: Resp[0]: 0x00000000 | Resp[1]: 0x00000000
[ 537.896108] mmc1: sdhci: Resp[2]: 0x00000000 | Resp[3]: 0x00000000
[ 537.896112] mmc1: sdhci: Host ctl2: 0x00000000
[ 537.896118] mmc1: sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x0000000000000000
[ 537.896121] mmc1: sdhci: ============================================
This looks to me as if it is trying to open the SD card (but there
is no SD card in the slot).
Here's the part of dmesg output where the slot is recognized:
[ 2.093265] sdhci: Secure Digital Host Controller Interface driver
[ 2.093267] sdhci: Copyright(c) Pierre Ossman
[ 2.111345] sdhci-pci 0000:00:1e.4: SDHCI controller found [8086:9d2b] (rev 21)
[ 2.111363] sdhci-pci 0000:00:1e.4: enabling device (0000 -> 0002)
[ 2.112328] mmc0: SDHCI controller on PCI [0000:00:1e.4] using ADMA 64-bit
[ 2.112348] sdhci-pci 0000:00:1e.6: SDHCI controller found [8086:9d2d] (rev 21)
[ 2.112364] sdhci-pci 0000:00:1e.6: enabling device (0000 -> 0002)
Why would it do this?
6 years
Help debug a network issue
by Robin Laing
Hello,
I am trying to trace down a problem with a laptop that when it goes into
suspend for any reason, the network won't come back up. Only a reboot
will enable the wired network.
This problem started in February after a kernel update with Fedora 26.
Upgraded to Fedora 27 today and the problem still persists. I was
hoping it would be fixed.
The only indication of any issue is an error message that pops up.
kernel: do_IRQ: 7.33 No irq handler for vector.
I would like to find more details but if I cannot I will just file a bug
against the kernel.
Robin
6 years
Problems with ASUS MB and CPU temperature
by GianPiero Puccioni
Hi,
I have recently installed Linux on my PC and I have some problems with the CPU
temperature, while everything works fine under Win10.
The MB is an Asus STRIX B250F - The chipset is reported by hwinfo as
"Intel 200 Series PCH LPC Controller (B250)".
The problem is that it seems that the fans are not controlled and the CPU temp
get very high, and during some tasks (like a "dnf update" with several packages)
I get a "Temp critical CPU throttled" message.
The sensors command gave little help at start with the default installation.
On line I found some advice and I tried using the grub option
"acpi_enforce_resources=lax" and loading the "nct6775" module which reports
"Found NCT6793D or compatible chip at 0x2e:0x290" in dmesg.
With this sensors gave more info (Temp and Fans) but some was still missing
unfortunately the problem remains.
Does anyone knows what is the proper module to load for this chipset?
Or if there is something else to be done.
Thanks,
GianPiero
6 years
vt's enable screen blanking
by Wolfgang S Rupprecht
How does one activate screen blanking on the vt's these days?
I have an ancient 32-bit x86 Acer mini laptop running as a server where
the X11 greeter just started crashing in a tight loop. I've turned the
graphical login off but that leaves me with the first vt's login prompt
displaying. Whatever is responsible for blanking the screen seems not
to be doing its thing. Where is the screen blank timer configuration
these days? It has been so long and things have changed so much that
google is useless. I assume systemd has absorbed that function by now
but I can't find it. /etc/systemd/logind.conf doesn't seem to have a
screenblank setting even though it seems to have everything else.
-wolfgang
6 years
Borgmatic
by Patrick O'Callaghan
I've recently started experimenting with Borg as a deduplicating
backup system ('dnf install borgbackup'). Think 'duplicity' on steroids.
However there are many quite complex configuration options and a number
of efforts exist to make things simpler for the average user, especially
when setting up an automated backup regime (the only kind of backup
that's worth a candle of course).
One of these is a Python3 script called Borgmatic (https://torsion.org/
borgmatic/), which is easy to install using pip3 but needs some minor
tweaking to run on Fedora (it installs in /usr/local/bin, which is not
in the default PATH for sudo). It would be much more elegant if this
could be done as a proper Fedora package and installed in /usr/bin.
I've been in touch with the creator and although he has no issue with
this happening he's not a Fedora user himself. I'm not volunteering to
do it either because a) I have no experience of package creation and
maintenance, and b) Borg itself is already maintained as part of
Fedora, so the logical step would be for the Fedora maintainer to take
it on. What is the approved process for suggesting this?
poc
6 years
Power settings wrong or battery dying?
by Danny Horne
Hi all,
I have a four year old laptop that's running Fedora 27 Workstation. If
I leave the thing switched off and unplugged after a day it will need
recharging by varying degrees.
Have I missed something in the power settings or is my battery on it's
way out?
Thanks for looking
6 years
