There are different ways of using the json(b) operators in a PostgreSQL column.
The differences between two of them (->) and (->>) are described below:
‘[1,2,3]’::json->2 returns “2”
‘[1,2,3]’::json->>2 returns 2
There is a google Admin toolbox that lets you check your domain’s MX records.
This can be found here: https://toolbox.googleapps.com/apps/checkmx/
You want to update your dns resolution locally after some change in DNS.
You want to do this because your local dns cache still holds the old information about the domain. For example using your local dns and the google one returns two different results
host changed_domain.com returns the old ip host changed_domain.com 8.8.8.8 returns the new ip.
Check your systemd-resolved is active:
sudo systemctl is-active systemd-resolved active
Get some statistics:
sudo systemd-resolve --statistics
Transactions
Current Transactions: 0
Total Transactions: 38818
Cache
Current Cache Size: 73
Cache Hits: 21120
Cache Misses: 19745
DNSSEC Verdicts
Secure: 0
Insecure: 0
Bogus: 0
Indeterminate: 0
Flush the cache (make the Current Cache Size above 0)
sudo systemd-resolve --flush-caches
Check the cache again (should be 0 now):
sudo systemd-resolve --statistics
ransactions
Current Transactions: 0
Total Transactions: 38818
Cache
Current Cache Size: 0
Cache Hits: 21120
Cache Misses: 19745
DNSSEC Verdicts
Secure: 0
Insecure: 0
Bogus: 0
Indeterminate: 0Information taken from https://www.techrepublic.com/article/how-to-flush-the-dns-cache-on-linux/
To show all events on a specific kubernetes namespace ordered by date use the following:
kubectl -n namespace_name get events --sort-by='.metadata.creationTimestamp'
To display your vm templates, as opposed to all available templates in Exoscale using the exo CLI, use the following (you should have already the environment variables set up to be able to use exo):
exo vm template list --mine ????????????????????????????????????????????????????????????????????????????????????????????????????????? ? ID ? NAME ? CREATION DATE ? ZONE ? DISK SIZE ? ????????????????????????????????????????????????????????????????????????????????????????????????????????? ? a58f0180-689d-4663-aa53-91111111111 ? my-ubuntu ? 2020-08-12T13:44:01+0000 ? ch-dk-2 ? 50 GiB ? ?????????????????????????????????????????????????????????????????????????????????????????????????????????
To change this in your gitlab-runner configuration, depends on the version of your gitlab-runner as described in https://docs.gitlab.com/runner/configuration/feature-flags.html
If you version is 13.9.0 (gitlab-runner –version), then add the following in ~/.gitlab-runner/config.toml
[[runners]] name = "gitlab-runner-name" request_concurrency = 1 url = "https://git.url.test/" token = "xckaxxxxxxxx" executor = "kubernetes" environment = ["FF_GITLAB_REGISTRY_HELPER_IMAGE=1"]
You are trying to run locally the terraform plan, while using the Terraform’s Cloud remote backend, before commiting your changes to your repo and running it through Terraform’s Cloud UI, and you are getting the previous error message:
Error: Invalid provider configuration
Remember to add the environment variables needed for your provider (AWS, Google, Exoscale etc) in the Variables section of your Terraform Cloud setup.
Even you have added them before, using a new Workspace means you will need to add them to each new workspace.
If you would like to get more detailed overview when using terraform plan, you can turn trace logging on by setting setting the environment variable TF_LOG to a non-zero value, e.g. export TF_LOG=1 or TF_LOG=1 terraform plan
Using the asdf version manager to manage versions of various binaries like terraform, vault or packer is easily done by following the instructions below:
asdf plugin add terraform asdf install terraform latest asdf global terraform 0.14.9 asdf list terraform 0.14.9 terraform --version Terraform v0.14.9
Problem
You would like to rename multiple files, replacing some text with something else (like replacing Pixies_The with Pixies).
Solution
Install the rename utility
sudo apt install rename
and replace the text as follows
cd folder_to_rename_files rename 's/Pixies_The/Pixies/g' **