Devops tips & tricks
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Daily tips for devops, english contents. Hire me → devops@viettug.org
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Kanal postlari
#linux #bsd #ssh
To install #NetBSD to overwrite a remote #Linux machine when you only have #ssh (not VNC, cloud panel), you can simply using
cp command and its advanced version.
https://cloudbsd.xyz/
tl;dr: Please don't try this at home.| 2 | #kafka
3 useful ways to get Remote Code Execution in Kafka UI
https://github.blog/2024-07-22-3-ways-to-get-remote-code-execution-in-kafka-ui/ | 644 |
| 3 | #devops
Creating socks proxy by gcloud command:
shell 1> gcloud compute ssh --zone "europe-central2-a" "mybastion" --project "lauxanh.example" --ssh-flag="-D 2024"
shell 2> curl api.ipify.org -L 2>&1 --proxy socks5:///127.0.0.1:2024 ;echo | 664 |
| 4 | #devops
A hobby OS written in #nim https://github.com/khaledh/fusion | 588 |
| 5 |  When you're late for stand up but still have time with your typewriter machine... :D | 517 |
| 6 | This is a simple but resilient test for your redis. It is observed that this command reported error (empty output) while redis-cli didn't have any issue (likely due to some default tcp configuration). | 598 |
| 7 | https://x.com/lcasdev/status/1810696257137959018?s=19 | 564 |
| 8 | So, Google Chrome gives all *.google.com sites full access to system / tab CPU usage, GPU usage, and memory usage. It also gives access to detailed processor information, and provides a logging backchannel.
This API is not exposed to other sites - only to *.google.com.
This is interesting because it is a clear violation of the idea that browser vendors should not give preference to their websites over anyone elses.
The DMA codifies this idea into law: browser vendors, as gatekeepers of the internet, must give the same capabilities to everyone.
Update: in Microsoft Edge this capability is also available exclusively to *.google.com domains
And for everyone that keeps saying "Use Brave!!!":
Brave also has the same behaviour as Chrome and Edge here. The extension that allows Google to retrieve this information exclusively from *.google.com is also pre-installed in Brave. | 534 |
| 9 | In case you are curious, $4 to indicate that length of your (binary) string is 4. So that's not a random number, isn't it? | 654 |
| 10 | In case you are curious, $4 to indicate that length of your (binary) string is 4. So that's not a random number, isn't it? | 1 |
| 11 | #jq #nodeports
Find all allocated nodePorts on your cluster
kubectl \
get svc --all-namespaces \
-o json \
| jq -r '
.items[]
| select(.spec.ports != null)
| .spec.ports[]
| select(.nodePort != null)
| .nodePort
' \
| sort -n | 614 |
| 12 | #redis #cli #lover
Sending any command to redis server via netcat, when you can't install the official redis-cli
echo -e '*1\r\n$4\r\nINFO\r\n' | nc 10.xxx.xxx.xxx 6379 |head -4 | 945 |
| 13 | small note : ibm has been using Hashicorp Vault as backend for their commercial service
https://www.ibm.com/products/secrets-manager | 677 |
| 14 | #podman #docker #registry
$ docker pull redis
... 404 not found
$ docker pull docker.io/library/redis
... ok found
To make the first command work, add some alias in /etc/containers/registries.conf.d/00-shortnames.conf . | 639 |
| 15 | #helm #helm #helm
One of the very interesting buggy feature of Helm , is mentioned in this thread:
https://github.com/helm/helm/issues/3553#issuecomment-2089139511
You will see how crazy users want that feature, but for years the helm team has still some right reason not to support them =))
lt;dr: wtf is this? | 699 |
| 16 | #terraform #hashicorp
HC joined IBM (https://www.hashicorp.com/blog/hashicorp-joins-ibm)
> HashiCorp joins IBM to accelerate multi-cloud automation
Redhat / Fedora Core, Haschicorp, and OpenOffice are on the same board. Congratulations
PS: It's time to look at opentofu guys, later is better than never :D | 703 |
| 17 | #fritzbox
https://crapts.org/2024/04/21/all-fritz-box-modems-have-been-hijacked/
> TL;DR: Every Fritz!Box has been compromised by DNS hijacking and using a Fritz!Box is unsafe. Every user of a Fritz!Box should immediately stop using their Fritz!Box or set up their own DHCP server. | 607 |
| 18 | #dnsmasq #open source
Dnsmasq wins the first BlueHats Prize ( € 10 000) | 583 |
| 19 | #helm #values
helm show values prometheus-community/prometheus-blackbox-exporter | 792 |
| 20 |  #slack is not down. It is still running and returning some server error... | 734 |
