Posted on in system_administration
Effective session management is crucial for web applications to maintain user state and provide a seamless experience. PHP offers several session storage options, and one of the most efficient and scalable choices is Memcached. In this blog post, we'll explore how to use Memcached for PHP session storage, the benefits …
Posted on in System Administration
Quick and dirty OpenSSH configlet here. If you have a set of hosts or devices
that require you to first jump through a bastion host, the following will allow
you to run a single ssh command:
Host *
ProxyCommand ssh -A <bastion_host> nc %h %p
Change the Host * line to best …
Posted on in system_administration
I've been getting the following error from cron.daily in my inbox lately:
/etc/cron.daily/apt:
Cache has broken packages, exiting
That's an annoying email to get everyday. I decided I would apt-get clean and
that would probably fix the problem:
$ sudo apt-get clean
$ sudo apt-get dist-upgrade
Reading package …Posted on in System Administration
I use Pingdom's free service to monitor slaptijack.com. Apparently,
late Friday night, oom-killer decided that the server needed more memory and
took out the MySQL server. To make matters worse, I missed the alarm from Pingdom,
and slaptijack.com was down for pretty much all of Saturday. The fact …
Posted on in System Administration
Ever so often, something changes on the network, and you find that your
.ssh/known_hosts file has gotten out of date. Usually this happens after an
upgrade or device change. You'll get the rather ominous warning that
REMOTE HOST IDENTIFICATION HAS CHANGED!
If you are confident that someone isn't doing …
Posted on in system_administration
While updating the TCP tuning parameters on one of my OS X 10.11 servers, I noticed that my existing OS X TCP Performance Tuning page had gotten out of date. The page was nearly eight years old, so it is no surprise that happened. I updated the page in …
Posted on in System Administration
I have written previously regarding using
Redis for Magento session storage.
You can get the same benefits of using Redis for session storage (reduced disk
I/O, automatic key eviction) for any PHP application by making a quick change to
a couple of settings in your php.ini. I assume …
Posted on in System Administration
Although I do not use Exim myself, I have clients that do. Recently, we noticed that it was taking more than 20 seconds for their SMTP banner to display when initiating checks from the monitoring server. Connecting to the server locally (on any interface IP address) did not suffer the …
Posted on in System Administration
If you have ever used any tool to optimize a web page, you know that compressing
the return traffic to the client is a
big win. In nginx, this is done with
the gzip module. The
easiest thing to do is add gzip on; to the http stanza in your …
Posted on in System Administration
Naturally, I ran into this problem in the middle of the night when the client was asleep and I had no access to the Magento administrative interface. The short story is that after running a re-index of the site, the home page began returning a 404 error status. A bit …
