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Aug
27
comment Why doesn't Linux remove route from routing table if interface is physically down?
Services can just listen on the wildcard address; this is generally the default as it avoids the need to configure it before starting. (Though how you find the service is a different matter, if there are multiple IPs which might or might not be reachable).
Aug
24
comment Is there a plain GNU/Linux OS?
Hmm. E.g. note that GNU/Linux includes GNOME, which currently depends on systemd for important features. It's "interesting" to consider systemd as part of "the GNU system". It's more common to consider systemd part of a broader Linux project which encompasses the "Linux distributions". We could equally call them Linux-based or (covering a slightly different set) GNU-based. Looking at your quote, placed in the context of your answer only - the way it quotes GNU/ without /Linux seems almost divorced from reality. (Reversing the criticism of phrases like "Linux Distribution" for omitting the GNU)
Aug
22
comment GRUB rescue mode - where does it live?
It uses the "boot track" as well. If you look at fdisk you'll notice the first partition starts at sector 63... actually 2048 nowadays. So there's a few spare sectors after the MBR that grub uses to put more code. The MBR is too small on it's own, to contain a GRUB loader that can read the filesystem containing /boot.
Aug
16
comment Thread process in linux
1) I can't find the link here; it should be put in the answer anyway; 2) the quote only talks about users getting their own sched groups. But the conclusion written here glosses over that; it implies this will work the same when a system has only one active user running multiple processes.
Aug
11
comment Will btrfs snapshots ever share page cache?
edit: published plans or ideas? Deafening silence is an acceptable answer :). I guess containers are still very new, kernel development has many difficulties, and I'm over-curious about details like that.
Aug
9
comment Networking fundamentals: what IP is assigned a NIC if there is no successful DHCP negotiation?
I think you cannot say yes or no, because it's not plugged in (it would say RUNNING). Auto-config addresses require duplicate detection, so they have to probe the link first. Note modern ip link is better, it inverts the sense and would explicitly show NO CARRIER. linux ipv4 link-local pointer is here. Basically no-one enables it. NetworkManager doesn't support it as a fallback because of potential confusion, presumably it's considered too unusual to be worth the effort to provide sensible UI / UX.
Aug
9
comment Force reconnect on sshfs drive mounted via fstab
NOTE arcfour is no longer considered "safe". There's a replacement chacha20-poly1305, it seems to be slower. However you might find aes128-gcm@openssh.com is actually faster than either, if both ends have cpu with AES-NI instruction set. crypto.stackexchange.com/a/10994/4074
Aug
8
comment Force reconnect on sshfs drive mounted via fstab
Ok, I would use noauto then. Lol @ man mount: The command mount does not pass the mount options unbindable, runbindable, private, rprivate, slave, rslave, shared, rshared, auto, noauto,comment, x-*, loop, offset and sizelimit to the mount.<suffix> helpers. All other options are used in a comma-separated list as argument to the -o option.
Aug
7
comment Process which locks up, ignores SIGKILL, is runnable (not a zombie or in uninterruptable sleep). What state is it in?
hmm I wonder what /proc/X/syscall is supposed to show while a page fault is being serviced (e.g. reading pages of a file through mmap() memory).
Aug
7
comment Process which locks up, ignores SIGKILL, is runnable (not a zombie or in uninterruptable sleep). What state is it in?
dmesg might also show if "hung task detector" triggers (if that's enabled it's supposed to show when tasks are stuck inside the kernel for too long).
Aug
7
comment Force reconnect on sshfs drive mounted via fstab
right, I found the review request :). Hope my comments about ps / kill ssh / nofail were useful too.
Aug
7
comment Force reconnect on sshfs drive mounted via fstab
Maybe you need to re-edit due to the conflict, I don't see anything in the review queue.
Aug
7
comment Force reconnect on sshfs drive mounted via fstab
Hmm, I just edited it as well :).
Aug
7
comment Force reconnect on sshfs drive mounted via fstab
yes. there are some generic options like users but the rest are passed to the specific filesystem.
Aug
7
comment Samba Error NT_STATUS_HOST_UNREACHABLE on any other node yet not on host
Say OS please (Fedora used to have a default-deny firewall). I'm not sure you've ruled out name resolution so you should say whether you're using IP address or a hostname. And you should be able to show the name/address to us - if it's an IPv4 address it will be a private one (NAT).
Aug
6
comment Debian 8 Jessie EFI dualboot Windows 8.1
though I'm happy to admit the Debian manuals are not as friendly as they could be. See UEFI section & usb boot section
Aug
6
comment Debian 8 Jessie EFI dualboot Windows 8.1
debian images are efi-bootable, unetbootin is not required. Check the official debian install guide. Secure-boot will need to be disabled as you say, however. (Ubuntu & Fedora can do secure boot, so they work without fiddling on systems certified for Windows 8).
Aug
3
comment No ethernet device detected
Rescan happens from scratch each boot. (There's no records like on Windows). I don't have any more productive suggestions, sorry - my main idea was to make sure you weren't running a custom kernel that lacked the driver. Next level of blind refreshing would be the package that installed the kernel / module files - not sure about the commands as I don't use Arch. If you struggle to work with them it might be simpler to start by re-validating the md5sum of the live ISO, boot from that & see whether ethernet is working. I guess this is a recent install so the kernel will be about the same.
Aug
2
comment No ethernet device detected
Sounds like you've covered that then, the driver module has already been loaded and you still have no eth0. I don't quite understand your answer - if lsmod already shows the modules modprobe won't do anything for any of them. And only three modules in lsmod? surprising. It's possible e1000 and e1000e conflict (they can do & e1000 is somewhat deprecated)... I'm not sure it would cause this failure though. Hmm if the modules are loaded, they may warn if they don't like the device, do check the kernel boot log (dmesg command) for messages from either module if you haven't already.
Aug
1
comment Linux, SSD and swap
Ye gods I have no idea. Seems more complicated to understand but it got merged first... I would take the Fedora move as an endorsement of zRAM's adequacy. What are the pros and cons - shrug. The obvious advantage of zswap is if you want to use a swap partition as well, you can see the design is supposed to work well with that. With zRAM that seems to be left as another item for the user to configure, and I don't know if it's expected to work well with a swap partition or not. My statement about running normal swap with lower priority came from a user blog so I don't know how reliable it is.