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@akorn
akorn / runcached
Last active November 28, 2025 08:25
Run specified (presumably expensive) command with specified arguments and cache result. If cache is fresh enough, don't run command again but return cached output.
#!/bin/zsh
#
# Purpose: run specified command with specified arguments and cache result. If cache is fresh enough, don't run command again but return cached output.
# Also cache exit status and stderr.
# Copyright (c) 2019-2023 András Korn; License: GPLv3
# Use silly long variable names to avoid clashing with whatever the invoked program might use
RUNCACHED_MAX_AGE=${RUNCACHED_MAX_AGE:-300}
RUNCACHED_IGNORE_ENV=${RUNCACHED_IGNORE_ENV:-0}
RUNCACHED_IGNORE_PWD=${RUNCACHED_IGNORE_PWD:-0}
@superseb
superseb / check-certificate-state-rancherv22.md
Last active August 28, 2023 07:52
Check certificate state on Rancher v2.2 clusters

Check certificate state on Rancher v2.2 clusters

Steps to verify certificate state for custom clusters in v2.2

Check certificates locally on nodes

Run script below to output certificate checksums for certificates present on the node.

#!/bin/sh
@otsuka752
otsuka752 / list_ns-of-R53
Created August 30, 2019 19:40
list of NS(NameServer) and IPAddress of Amazon Route 53
#0 ns-0.awsdns-00.com. 205.251.192.0
#1 ns-1.awsdns-00.com. 205.251.192.1
#2 ns-2.awsdns-00.com. 205.251.192.2
#3 ns-3.awsdns-00.com. 205.251.192.3
#4 ns-4.awsdns-00.com. 205.251.192.4
#5 ns-5.awsdns-00.com. 205.251.192.5
#6 ns-6.awsdns-00.com. 205.251.192.6
#7 ns-7.awsdns-00.com. 205.251.192.7
#8 ns-8.awsdns-01.com. 205.251.192.8
#9 ns-9.awsdns-01.com. 205.251.192.9
@Hakky54
Hakky54 / openssl_commands.md
Last active May 4, 2026 18:24 — forked from p3t3r67x0/openssl_commands.md
OpenSSL Cheat Sheet

OpenSSL Cheat Sheet 🔐

Install

Install the OpenSSL on Debian based systems

sudo apt-get install openssl
@hongkongkiwi
hongkongkiwi / main.tf
Last active November 16, 2023 23:38
Initialises Terraform HTTP backend to Gitlab. Here's a nice script which will ask for details in an interactive way.
# More information can be found at https://docs.gitlab.com/ee/user/infrastructure/#gitlab-managed-terraform-state
terraform {
backend "http" {
}
}
@riobard
riobard / tcpdump.txt
Last active August 12, 2022 08:19
Poem lines broadcast by my ISP-provided fiber optical modem
# My ISP-provided fiber optical modem broadcasts a line of a poem every ten seconds. Here's the tcpdump of the complete poem.
# The optical modem is made by Shanghai Nokia-Bell Co.,Ltd and its model number is G-140W-UD. It's provided by my ISP, China Unicom in Shenzhen.
$ tcpdump -i vlan10 ether proto 0x8300
15:59:00.720301 00:00:00:00:00:12 (oui Ethernet) > Broadcast, ethertype Unknown (0x8300), length 72:
0x0000: 0000 0000 e4ea 8386 d93c 5468 6520 6461 .........<The.da
0x0010: 7920 4920 6c6f 7374 206d 7920 7665 7279 y.I.lost.my.very
0x0020: 2066 6972 7374 2074 6f6f 7468 2c00 0000 .first.tooth,...
0x0030: 0000 0000 0000 0000 0000 ..........
15:59:10.740778 00:00:00:00:00:12 (oui Ethernet) > Broadcast, ethertype Unknown (0x8300), length 72:
@janeczku
janeczku / 01-multus-k3s.md
Last active March 12, 2025 12:29
Multus CNI with k3s and RKE

Using Multus CNI in K3S

By default, K3S will run with flannel as the CNI and use custom directories to store CNI plugin binaries and config files(You can inspect the kubelet args K3S uses via journalctl -u k3s|grep cni-conf-dir). So you need to configure that properly When deploying Multus CNI.

For example given the official Multus manifests in https://github.com/intel/multus-cni/blob/36f2fd64e0965e639a0f1d17ab754f0130951aba/images/multus-daemonset.yml, the following changes are needed:

volumes:
 - name: cni