To enable CORS for Amazon S3 bucket, add
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<?xml version="1.0" encoding="UTF-8"?> <CORSConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/"> <CORSRule> <AllowedOrigin>*</AllowedOrigin> <AllowedMethod>PUT</AllowedMethod> <AllowedMethod>POST</AllowedMethod> <AllowedMethod>DELETE</AllowedMethod> <MaxAgeSeconds>1800</MaxAgeSeconds> <AllowedHeader>*</AllowedHeader> </CORSRule> </CORSConfiguration> |
[…]
To list instances in Google Cloud App Engine, run
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gcloud app instances list |
To create an application
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gcloud app create |
To deploy an application
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gcloud app deploy |
[…]
To create a Google Cloud SQL database, run
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gcloud sql instances create INSTANCE_NAME_HERE --activation-policy=ALWAYS --tier=db-n1-standard-1 |
INSTANCE_NAME_HERE = this can be anything, lowercase letters, 0-9, for identification purpose only. db-n1-standard-1 => this is size of the server, you can change it as needed. To create a Database, run
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gcloud sql databases create DB_NAME_HERE --instance INSTANCE_NAME_HERE |
To create a User, run
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gcloud sql users set-password root --host=% --instance INSTANCE_NAME_HERE --password=PASSWORD_HERE |
To list all google cloud SQL instances, […]
On AWS EC2 when you boot, hostname set something like ip-172-31-41-172.eu-central-1.compute.internal To chaneg this, run
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hostnamectl set-hostname --static HOSTNAME_HERE |
Example
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hostnamectl set-hostname --static server1.serverok.in |
To disable change of hostname, run
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echo "preserve_hostname: true" > /etc/cloud/cloud.cfg.d/99_hostname.cfg |
Now reboot your server with
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reboot |
[…]
Once you resize disk in Amazon AWS console, it get auto resized on reboot. Some times this won’t happen, you have to manually resize the disk. To resize disk, do the following. 1) Take a snapshot of the disk 2) Create a new server in same availability zone as current server. Lets call it tmpServer. […]
To enable password less SSH login on VMWare ESXI server, add your SSH key to file
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/etc/ssh/keys-root/authorized_keys |
[…]
To list all running VM, run
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esxcli vm process list |
To list all installed software
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esxcli software vib list |
Example
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[root@server:~] esxcli software vib list | grep esx-ui esx-ui 1.33.1-12086396 VMware VMwareCertified 2019-02-24 [root@server:~] |
[…]
To open port 80 globally for all VMs on google cloud project, run
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gcloud compute firewall-rules create allow-port80-all --allow tcp:80 --source-ranges 0.0.0.0/0 --network default |
[…]
Amazon Route 53 DKIM error […]
DKIM keys failed to validate on a mail server. The domain used Amazon ROute 53 DNS server. amavisd-new showkeys command print out following public key for this domain.
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root@mail:~# amavisd-new showkeys ; key#1 1024 bits, i=dkim, d=temashipyard.com.gh, /var/lib/dkim/temashipyard.com.gh.pem dkim._domainkey.temashipyard.com.gh. 3600 TXT ( "v=DKIM1; p=" "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDWcxPI2x5A0JtsRFfm6w8FNoWe" "tDPtFAQz7fbWfIQC98sth7407E7IiskMDGL1Je1OCP/0nKT3IkduNjh1yJlzN5db" "/phTtdIKsPmGAcqjskDBqLKRiKmPhknZVfO0EwqwCrFO0i9ZpN9" "vTGmquN0EdzPLK77iQIDAQAB") root@mail:~# |
When you cut and paste this in Amazon ROute 53, it get treadted as 4 seperate TXT records.
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root@mail:~# nslookup -q=txt dkim._domainkey.temashipyard.com.gh Server: 172.31.0.2 Address: 172.31.0.2#53 Non-authoritative answer: dkim._domainkey.temashipyard.com.gh text = "v=DKIM1; p=" dkim._domainkey.temashipyard.com.gh text = "vTGmquN0EdzPLK77iQIDAQAB" dkim._domainkey.temashipyard.com.gh text = "/phTtdIKsPmGAcqjskDBqLKRiKmPhknZVfO0EwqwCrFO0i9ZpN9MFBoY91Bzt9o4" dkim._domainkey.temashipyard.com.gh text = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDWcxPI2x5A0JtsRFfm6w8FNoWe" dkim._domainkey.temashipyard.com.gh text = "tDPtFAQz7fbWfIQC98sth7407E7IiskMDGL1Je1OCP/0nKT3IkduNjh1yJlzN5db" Authoritative answers can be found from: root@mail:~# |
When i test with
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root@mail:~# amavisd-new testkeys TESTING#1 temashipyard.com.gh: dkim._domainkey.temashipyard.com.gh => invalid (public key: syntax error) root@mail:~# |
It shows […]