Tom's Blog
Tom's Blog
Tom
DevOps blog about Linux configuration, Containerization, Automation, Security and from time to time Leadership.
Latest Posts
Wydajność JavyPoznaj i wykorzystaj optymalne sposoby na regulowanie wydajności oprogramowania Java!Authors: Charlie Hunt, Binu John
Gra EnderaSaga Endera. Tom 1Author: Card Orson Scott
Learn how to debug memcached servers by sniffing network traffic to inspect commands, measure transfer rates, and analyze command frequencies using common Linux tools.
I had strange statistics on one memcached servers. I had to look what it’s doing there. I found such commands1 that may be used to sniff, extract and make statistics from running memcached server. Debug GET commands Show only GET...
It happen to me all the time that one of developers notifies me about some kind of problem that I can’t confirm from my account. Sometimes it was because of bad ssh keys configuration, other times file permissions, mostly such stuff....
Virtualenvs in python are cheap but from time to time you will install something with pip on your system and when time comes removing all this crap could be difficult. I found this bash snippet1 that will uninstall package with all...
I’ve been using standard MySQL dumps as backup technique on my VPS for few years. It works fine and backups were usable few times when I needed them. But in other places I’m using xtrabackup1. It’s faster when crating backups and a lot...
When you deploy your application in cloud you don’t need and don’t want your hosts exposed via SSH to the world. Malware scans whole network for easy SSH access and when find something will try some brute force attacks, overloading such...
Lately I was searching for mobile notebook that I could use for remote work. I checked f ThinkPad series but they were huge bricks that have nothing in common with ‘mobile’ word. Then I saw ASUS Zenbook that I didn’t take into account...
I try to use IPv6 where it’s available but it’s sometimes so hard… It happen quite often that I can’t download packages from repos because they weren’t configured on IPv6 vhosts even when host is available via IPv6 address. For APT you...
I was configuring WordPress with HyperDB external link plugin on PHP 7.0 but the only I get were constant 500 errors. As I found here external link PHP 7.0 is not supported by HyperDB for now - it’s rely on mysql php extension but in PHP...
Sometimes it’s easier to use octal file permissions but they’re not so easy to list. I caught myself few times that I didn’t remember how to list them - so this is a reason for that note. stat -c "%a %n" * 755 bin 755 games 755 include...
I’m playing a lot with Docker lately. Building images, and then rebuilding, and then building again… It’s pretty boring. To automate this task a little I used inotify to build automatically after I changed any file. This trick could be...
I never tried it before but today I needed to install WordPress… From command line only. And there is a way to do this with wp-cli external link . WP-CLI installation First some requirements (as root): apt-get install php5-cli php5-mysql...
When I started playing with Docker I was running a lot of commands to build image, delete containers running on old image, run containers based on new image, etc… A lot of log commands with links, volumes, etc… Then I started searching...