Use the ssh-keygen command on a computer to which you’ve downloaded your private key .pem file; for example: First, ensure permissions will allow ssh-keygen to work: chmod 600 /path/to/the/file/your-key-pair.pem Then generate an RSA public key: ssh-keygen -y -f /path/to/the/file/your-key-pair.pem > your-key-pair.pub
There are many things to configure in Nagios, especially when using custom check commands. Recently I needed to configure all of the Continuent Clustering Nagios checks. Once setup on the database side, I wanted to confirm that everything was working. Basics: Run a Remote NRPE Check To test a remote NRPE client command from a […]
h Shows you a screenful of message headers (a “header” being the number, sender, date, size and subject). h with no message number shows the current screenful of messages (the number that make up a screenful is set with the screen variable, described below). h$ shows you the last screenful of messages — which is […]
-dPDFSETTINGS={value} where {value} is one of: /screen – the lowest resolution and lowest file size, fine for viewing on a screen /ebook – mid-range resolution and file size /printer – high-quality setting used for printing PDFs /prepress – high-quality setting used for printing PDFs As always, YMMV…
I wanted to send email from cron for various reasons, but the emails would bounce with an error 554: 554 5.1.8 : Sender address rejected: Domain not found Clearly, Postfix was using the “internal” hostname of myappledesktop.local (MacOSX has TWO hostnames! also, myappledesktop.local is not the real hostname ;-). So, I needed two things: 1. […]
I was getting the following errors when using an older version of the Amazon EC2 API Tools: $ ec2-describe-regions Unknown problem connecting to host: ‘https://ec2.amazonaws.com’ Unable to execute HTTP request: peer not authenticated The solution was to upgrade to the latest AWS CLI tools and start using the aws command instead. For example: aws ec2 […]
erics, February 4th, 2019 
Categories: How-To's, Technology .pem, .pub, Amazon, apple, AWS, cli, howto, key, key-pair, KeyPair, Linux, Mac, MacOS, macosx, Pubkey, public, Public Key, ssh-keygen, tips
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