Docker Login
docker login command allows you to login to docker.com. You need to login to docker before you can upload your own images…
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postconf
postconf allow you to list/change postfix configuration. To list current config, run postconf -n To change a configuration, run postconf -e home_mailbox=Maildir/…
Amazon Workmail Review
Amazon Workmail is business email hosting like Google G Suite, Office 365, etc.. https://aws.amazon.com/workmail/ Workmail cost $4 per user, comes with 50…
Install Docker on Ubuntu
To install Docker on Ubuntu, run Add your user in docker group Back to Docker
portainer – Web based UI for Docker
Portainer is a web based UI for managing docker. https://portainer.io You can run it with command Now login to portainer with url…
swap
First create a 2 GB file dd if=/dev/zero of=/swapfile bs=1M count=4096 For 8 GB, use count=8192. You can also use fallocate command…
DNS Tools
Reverse DNS/rDNS/PTR Record How to delete Google Cloud DNS Zone DNS Tools https://dnschecker.org https://intodns.com https://dnsmap.io http://leafdns.com https://dnsviz.net https://www.dnsperf.com dig Google Public DNS…
Apache Invalid command Header
On a new Debian server with Apache, web site give 500 internal server error. On checking error log, i found [Thu Jan…
Radio
http://libretime.org/ allow you to run your own radio station. It allow you to manage you media, playlists. It support IceCast and Shutcast…
Ubuntu point all .test domains to 127.0.0.1
Until recently .dev was popular TLD used by developers for local web development. Recently google acquired the rights to use .DEV domain…
certbot certificates
To list all letsencrypt SSL certificates, run certbot certificates Example root@ok:~# certbot certificates Saving debug log to /var/log/letsencrypt/letsencrypt.log Revocation status for /etc/letsencrypt/live/boby.hosthat.com/cert.pem…