An open-source service monitoring system and time series database.
via Prometheus.
“Invert” a dict in python
If you have a list/tuple in python and you want to use the items in there to return an index of the position of the item, you can do so like this:
a = ('archive', 'audio', 'document', 'video', 'executable',
'image', 'misc', 'parity')
lookup = { v:k for k,v in enumerate(a) }
Warn your clients before disabling SSLv3 on Apache for POODLE
With POODLE, everyone is hurrying to disable SSLv3 on their webservers. However some sites still have clients that for whatever reason have not updated from XP / IE6 (it’s only been out 13 years, what’s the rush?) Instead of immediately locking them out you might like to give them a few days warning with some Apache 2.2 config as below:
RewriteEngine On
RewriteCond %{HTTPS} =on
RewriteCond %{SSL:SSL_PROTOCOL} =SSLv3
RewriteRule .* http://www.webscalability.com/blog/ [L,R]
Set the RewriteRule to an explanatory page of your choosing (if it’s on the same HTTPS server, you’ll need to exclude the page to prevent a rewrite loop).
If you don’t have IE6 to hand, you can test this as below:
echo "GET /" | openssl s_client -connect yourpoodleserver.com:443 -ssl3 2>&1
Icinga 2
Checking out Icinga 2 on Centos 7 – really impressed so far.
Hitting a link in an HTML email in mutt
add
macro attach V |'lynx -stdin'\n
to .muttrc
then when you are in the attachment menu, select the HTML content and hit V. This will launch a lynx process to view the content, follow links, etc. This is on top of having text/html ; lynx -dump -force_html %s ; copiousoutput or similar set in your ~/.mailcap to view inline.
SHAAAAAAAAAAAAA | Do you have the latest SHA???
SHAAAAAAAAAAAAA | Do you have the latest SHA???.
A great article on some reconfiguration you may need to do on your SSL certificates – have just resubmitted my certificate request and now have a SHA-256 hashed cert.
Collins – Infrastructure Management for Engineers
Collins – Infrastructure Management for Engineers.
A tumblr inhouse tool for CMDB / configuration management / provisioning.
Filtering Lines in a Text File using Emacs – Erik Öjebo.se
Filtering Lines in a Text File using Emacs – Erik Öjebo.se.
aka “grep for Emacs”
perf.fail
Rainbowstream – great console based twitter client
I couldn’t get twittering-mode for emacs to work in a console (gpg decryption of credentials failed), but rainbowstream is great. Stick it in a screen or tmux session.