similar to: RT/Linux SCHED_RR/_FIXED to combat latency?

On Thu, 10 Aug 2023, Cedric Blancher wrote: >We're experiencing rather very bad latency spikes on busy Linux >systems, for example if one machine is the jumphost (ssh -J) for a few >hundred connections, while at the same time handles CPU intensive >tasks. > >Would RT/Linux SCHED_FIXED or SCHED_RR be of help in such a case, e.g. Did you already check the old and tried method

On 2 January 2018 at 17:08, Marc Haber <mh+openssh-unix-dev at zugschlus.de> wrote: > On Tue, Jan 02, 2018 at 04:03:34PM +1030, David Newall wrote: >> On 02/01/18 03:29, Michael Str?der wrote: >> > How high is the risk that this unmaintained device is added to >> > yet-another-bot-net in the Internet-of-shitty-devices or is used to >> > enter parts of your

On 23 April 2014 21:43, mancha <mancha1 at zoho.com> wrote: > On Wed, Apr 23, 2014 at 12:26:58PM -0700, Iain Morgan wrote: >> A slightly better solution would be a PAM module that uses the same >> syntax as libwrap. Possibly someone has already written such a module. > > Possibly, but only for platforms which use for PAM. Pam is executed so late in the chain that any

Hello, I am searching a SSH server for remote administration of an embedded application running on RTEMS (https://www.rtems.org). This environment has neither virtual memory nor user and kernel space. So this is like an application running in kernel mode only. Would it be possible to run (a very basic version of) OpenSSH in such an environment using e.g. threads instead of forking new

On Fri, 29 Dec 2017, Daniel Kahn Gillmor wrote: > On Thu 2017-12-28 21:31:28 -0800, Dan Mahoney (Gushi) wrote: > > Why not make minimum key length a tunable, just as the other options are? > > Because the goal of building secure software is to make it easy to > answer the question "are you using it securely?" This is a nice summation of our approach. It's the

I was given a custom CentOS 5.4 DVD, containing some Digium software for one of our customers. I need to turn this burned DVD into an image that can be written to a USB thumb drive. First, I ripped the DVD to an ISO image. That part works OK, my testing VM can load and run the custom kickstart script on the image. After totally frying my unetbootin install, I decided to try and use isohybrid

Hi, /bin/sh can be very different.... Ubuntu 22.04: :; ls -hal /bin/sh /bin/bash -rwxr-xr-x 1 root root 1,4M Jan 6 2022 /bin/bash lrwxrwxrwx 1 root root 4 Mar 23 2022 /bin/sh -> dash OpenIndiana (old OpenSolaris reincarnation) :; ls -hal /bin/sh /bin/bash -r-xr-xr-x 1 root bin 1,4M Jan 25 09:42 /bin/bash lrwxrwxrwx 1 root root 9 Apr 6 2021 /bin/sh -> i86/ksh93 On

Hi! ---- I'm doing some testing with the ssh client OpenSSH on Windows 10 (10.0-19045) but due to firewall restrictions I need to run my experiments from a local port < 1024 (not negotiable). I thought that this was no problem... but ssh |bind()| fails with "address in use" (yes, I checked netstat, no one is there) for any port < 1023. Then I checked $ netstat # and $ netsh

The Asterisk Development Team has announced the release of libpri 1.4.13. This release is available for immediate download at http://downloads.asterisk.org/pub/telephony/libpri The release of libpri 1.4.13 resolves several issues reported by the community and would have not been possible without your participation. Thank you! The following are the issues resolved in this release: * --- Outgoing

I'm trying to get ChansSpy to work. It works, in the pass/fail sense, but it is difficult to understand the various speakers. I can hear users on our end just fine, but the other end sounds like their going through a vocoder, if I can understand them at all. Otherwise it is just garbled. We are using the following setup: all of our phones are SIP phones; for our outgoing calls we make use of a

On 02/01/18 03:29, Michael Str?der wrote: > How high is the risk that this unmaintained device is added to > yet-another-bot-net in the Internet-of-shitty-devices or is used to > enter parts of your network. I think that is what is called a straw-man argument.? If a device can be compromised in the way you suggest, then I am sure it will be replaced, but it will be replaced because it

On Windows, ?scp C:/foo/bar remotehost:? will attempt to connect to a remote host ?C? and access file ?/foo/bar?. There is currently no syntax or flag to allow copying files that start with a drive name. This patch changes the behaviour (only on Cygwin) by considering that a single letter followed by a colon is a Windows drive name and thus an absolute path. This is also more consistent with the

My company uses a certain product which forces me to use a jumphost / ssh proxy. When connecting to a server I have to type "ssh myuser at technicaluser@targethost at jumphost" everytime. I tried to simplify this by editing my ssh_config and putting this into the file: Host targethost ProxyJump technicaluser at jumphost These lines are recognized but don't work like intended

On Thu, Oct 15, 2015 at 04:15:03PM -0400, Daniel Kahn Gillmor wrote: > if the intermediary machine (the "jumphost") is jumphost.example, and > you are trying to reach bar.example.com (which is behind the firewall), > you would do: > ssh -oProxyCommand='ssh jumphost.example -W %h:%p' bar.example.com We use jump host, but there are literally hundreds of hosts behind

On Tue, Oct 20, 2015 at 01:31:46AM +0200, ?ngel Gonz?lez wrote: > On 16/10/15 12:46, hubert depesz lubaczewski wrote: > >On Thu, Oct 15, 2015 at 04:15:03PM -0400, Daniel Kahn Gillmor wrote: > >>> if the intermediary machine (the "jumphost") is jumphost.example, and > >>> you are trying to reach bar.example.com (which is behind the firewall), >

Hi, I'm in a situation where I'm using multiple SSH keys, each to connect to different set of servers. I can't load/unload keys on demand, as I usually am connected to at least 2 of such sets. But - some rogue "root", could get access to my agent-forwarding socket, and in turn, get access to keys loaded to agent (not in terms of obtaining the key, but being able to use it

Hi I was asking about the fedora 14 kernel if it is good enough for cgroup usage because I am trying to set a cgroup under cpu subsytem ( /dev/cgroup/cpu/group1/ ) that have /cpu.rt_runtime_us of 100000 while cpu.rt_period_us has a value of 1000000 i.e a ratio of 1/10 . still when I run a task (endless loop) in that group (cgexec -g cpu,cpuset:group1 ./test) it gets all the cpu core time

On Fri, 26 May 2023, Mingye Wang (Artoria2e5) wrote: > ssh(1) currently affords an argument-passing functionality, but as the manpage > states, all arguments are simply concatenated by space. How else would it do that? The arguments are processed by the shell first then passed as an array of NUL-terminated strings. > The modest proposal is that we put a giant CAVEATS section in the

On Tue, 2 Dec 2014, H. Peter Anvin wrote: > This is the default unless the "quiet" option is set. Hmm. tglaser at luna:/srv/tftp $ fgrep -ri quiet . Binary file ./hdt.c32 matches Binary file ./ldlinux.c32 matches Binary file ./vmlinuz matches Binary file ./linux.c32 matches Binary file ./debian-installer/jessie/amd64/linux matches Binary file ./debian-installer/jessie/i386/linux

On Thu, Oct 15, 2015 at 07:02:58PM -0400, Nico Kadel-Garcia wrote: > On Thu, Oct 15, 2015 at 10:34 AM, hubert depesz lubaczewski > <depesz at depesz.com> wrote: > > Hi, > > > > I'm in a situation where I'm using multiple SSH keys, each to connect to > > different set of servers. > > > > I can't load/unload keys on demand, as I usually am