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Unable to negotiate with 192.168.1.1 port 22: no matching key exchange method found. Their offer: diffie-hellman-group14-sha1,diffie-hellman-group1-sha1,[email protected]
Unable to negotiate with 192.168.1.1 port 22: no matching host key type found. Their offer: ssh-rsa

ssh -o KexAlgorithms=diffie-hellman-group1-sha1 -o HostKeyAlgorithms=+ssh-rsa -o PubkeyAcceptedAlgorithms=+ssh-rsa user@host

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https://archive.ph/cBcTD
https://web.archive.org/web/20240531085449/https://github.com/raivo-otp/ios-application/issues/328
https://web.archive.org/web/20240209114245/https://github.com/raivo-otp/marketing-website/issues/19
https://archive.ph/fGnO3#selection-8895.0-8895.99

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https://bombich.com/kb/ccc6/some-files-and-folders-are-automatically-excluded-from-backup-task

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Knowledge Base (ccc6)Some files and folders are automatically excluded from a backup task

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https://matt.sh/apfs-object-map-free-recovery

APFS Object Map Recovery (free)
APFS Object Map Recovery
I spent a day figuring out how to look into a corrupt encrypted APFS partition. Here’s the notes.

If you only care about the answer, jump to the last section.

Kernel Panic
macOS hard panicked on me with a graphics driver corruption error com.apple.iokit.IOAcceleratorFamily2 (which happened after seven “gpuRestart” logs were generated back-to-back).

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#!/bin/bash
# thanks microsoft copilot. worked from first try. prompt:
# can you write a small script in a language of your choice that takes input as defined by the name of the input file, searches for patterns that resemble an ethernet mac address including those that omit the zero, such as like when netstat on macos does, then replace the last three octets of the mac address with xx:xx:xx
# it wrote python but python requires xcode so I asked for a rewrite in bash

filename="$1"

# MAC address pattern (with optional leading zeros)
pattern="([0-9A-Fa-f]{1,2}[:-]){5}([0-9A-Fa-f]{1,2})"

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copied from https://git.scc.kit.edu/-/snippets/563, found on search for "device mapper volatile writeable readonly"

#!/bin/bash

set -e

# test if $1 exists
test -f "$1"

BASEDIR=$(dirname "$1")

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  27332 pts/0    S+     0:00  |           \_ sudo -E dnf --enablerepo=ol8_UEKR6 install kernel-uek-5.4.17-2136.320.7.1.el8uek.x86_64 kernel-uek-devel-5.4.17-2136.320.7.1.el8uek.x86_64
  27334 pts/0    S+     1:40  |               \_ /usr/libexec/platform-python /bin/dnf --enablerepo=ol8_UEKR6 install kernel-uek-5.4.17-2136.320.7.1.el8uek.x86_64 kernel-uek-devel-5.4.17-2136.320.7.1.el8uek.x86_64
  48159 pts/0    S+     0:00  |                   \_ /bin/sh /var/tmp/rpm-tmp.UD5iFV 2
  56855 pts/0    S+     0:00  |                       \_ /bin/bash /bin/kernel-install add 5.4.17-2136.320.7.1.el8uek.x86_64 /lib/modules/5.4.17-2136.320.7.1.el8uek.x86_64/vmlinuz
  56897 pts/0    S+     0:00  |                           \_ /bin/sh /usr/lib/kernel/install.d/40-dkms.install add 5.4.17-2136.320.7.1.el8uek.x86_64 /boot/b26894ddea4a49caaac4c71d4e27f057/5.4.17-2136.320.7.1.el8uek.x86_64 /lib/modules/5.4.17-2136.320.7.1.el8uek.x86_64/vmlinuz
  56898 pts/0    S+     0:00  |                               \_ /bin/sh /usr/lib/

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sudoedit /etc/tmpfiles.d/libvirt-container.conf
d /run/libvirt-fedora 0755 ml35 ml35 -
sudo systemd-tmpfiles --create /etc/tmpfiles.d/libvirt-container.conf
sudo gpasswd -a ml35 kvm
sudo setsebool -P container_use_devices=true
sudo setsebool -P container_manage_cgroup true
$ grep source /var/local/macos-mojave-10.14.xml
  <resource>
  </resource>
      <source dev='/dev/zvol/gen8/vm/mojave-din-vmware'/>

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https://access.redhat.com/articles/3129891#choosing-a-local-file-system-6

Another way to characterize this is that the Ext4 file system variants tend to perform better on systems that have limited I/O capability. Ext3 and Ext4 perform better on limited bandwidth (< 200MB/s) and up to ~1,000 IOPS capability. For anything with higher capability, XFS tends to be faster. XFS also consumes about twice the CPU-per-metadata operation compared to Ext3 and Ext4, so if you have a CPU-bound workload with little concurrency, then the Ext3 or Ext4 variants will be faster. In general, Ext3 or Ext4 is better if an application uses a single read/write thread and small files, while XFS shines when an application uses multiple read/write threads and bigger files.

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/managing_file_systems/overview-of-available-file-systems_managing-file-systems

ext4 is better when:

Single-threaded I/O
Limited I/O capability (under 1000 IOPS)

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mktable gpt
mkpart ESP fat32 1MiB 513MiB
set 1 boot on
mkpart biosboot 513MiB 514MiB
set 2 bios_grub on
mkpart msftres 514MiB 530MiB
unit MiB

(parted) p
Model: ATA Samsung SSD 860 (scsi)