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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
24
answered How can I update the kernel and initrd images in EFI boot loader?
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
reviewed Edit Udev- How do I find out which subsystem a device belongs to?
Aug
16
revised Udev- How do I find out which subsystem a device belongs to?
sudo is unnecessary
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
11
revised Will btrfs snapshots ever share page cache?
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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
9
answered Networking fundamentals: what IP is assigned a NIC if there is no successful DHCP negotiation?
Aug
9
revised Drop all ICMP packets?
added 661 characters in body
Aug
8
revised Force reconnect on sshfs drive mounted via fstab
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Aug
8
revised Force reconnect on sshfs drive mounted via fstab
added 222 characters in body
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
revised Force reconnect on sshfs drive mounted via fstab
added 79 characters in body
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.