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(2019-01-21) Problem I have a long running ping and I want to see where we are without killing the ping. Solution Windows: CTRL-BREAK Linux: CTRL-\ eg: [...] 64 bytes from wiki.xdroop.com (139.60.168.32): icmp_seq=126 ttl=55 time=12.1 ms 64 bytes from wiki.xdr...

(2026-05-14) $ ntttcp --help NTTTCP for Linux 1.4.0 --------------------------------------------------------- ntttcp: invalid option -- '-' Author: Shihua (Simon) Xiao, sixiao@microsoft.com ntttcp: [-r|-s|-D|-M|-L|-e|-H|-P|-n|-l|-6|-u|-p|-f|-b|-W|-t|-C|-N|-R|-...

(2026-07-02) Enable Mirrored Networking Edit .wslconfig Open (or create) the file at: C:\Users<YourUser>.wslconfig Add the following under [wsl2]: [wsl2] networkingMode=mirrored dnsTunneling=true autoProxy=true Copy Save the file. Restart WSL Run in PowerShel...

Hello I wish I could point you at this page as the default page for this wiki. About This is a wiki where I store various things that I learn. It isn't meant to be authoritative, it is more a lab notebook that I leave open so I can refer back to it from arbitr...

(2026-07-07) Problem I have a .ova file that I need to import into Hyper-V. Yadda yadda yadda, I have a .vmdk disk image that I need to convert to .vhd or .vhdx so Hyper-V will inhale it. Solution qemu-img for Windows: PS> qemu-img.exe convert source.img -O vh...

(2026-07-07) Sysinternals Install Sysinternals -- it's in the store and puts all the goodies in the path. c:\> handle.exe -a -u "FullPathToYourFile"

(2026-07-21) On an Aruba CX 6200M switch running AOS-CX, TX Drops (Transmitted Drops) almost always indicate egress port buffer congestion, rather than physical layer (Layer 1) cable damage. It means the switch successfully received the packet and wanted to se...

(2026-07-21) Problem: Ubuntu is defaulting to trying ipv6 to find things and you don't have an ipv6 network to support the same. Solution: sudo tee -a /etc/sysctl.conf << 'EOF' net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 net.ipv6....

(2026-07-24) Problem: By default, Hyper-V VMs have NumLock disabled. If your workstation has NumLock enabled, clicking into a Hyper-V console will set your NumLock to disabled, a state which remains when you click out of it. If you use your number pad then thi...

(2026-07-24) Problem: Laptop does not wake up properly from sleep mode. Might wake up immediately, might require multiple close/opens of lid to wake up, might not wake up at all. Logs point finger at "returnign from Modern Sleep mode" or the like. Solution: Go...

(2026-08-21) Problem: Syslog error: I/O error, dev fd0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 or similar Solution As root: echo "blacklist floppy" > /etc/modprobe.d/blacklist-floppy update-initramfs -u rmmod floppy

(2026-08-21) etplan set "ethernets.eth0.addresses=[172.17.12.91/24]" netplan set "ethernets.eth0.routes=\"[{to: 0.0.0.0/0 via: 172.17.12.1}]\"" netplan set "ethernets.eeth0.dhcp4=false" netplan set "ethernets.eth0.nameservers.addresses=[1.1.1.1, 9.9.9.9]" netp...

(2026-08-21) # No MOTD advertising please cat << "EOMOTD" > /etc/default/motd-news ENABLED=0 URLS="https://motd.ubuntu.com" WAIT=5 EOMOTD cp /dev/null /var/cache/motd-news # Stop talking about ESM in the MOTD please (https://askubuntu.com/questions/1453749/in...

(2026-08-26) CVS uses tags. Rancid uses CVS. Using this in combination with frequent configuration checkpointing we can look at diffs with respect to a baseline that is constant without having to worry what the revision number(s) of that/those file(s) is/are. ...

(2026-08-28) Enable Auto-Rollback: # checkpoint auto 5 Disable the rollback if the config change worked: # checkpoint confirm