Linux

I wanted to share publicly some photos, but I performed them with navigation enabled so they contained accurate localization of my house. I wanted to remove EXIF data GPS tags, my phone type and other irrelevant stuff. Tip There’s a way that requires less effort. Check how to automate this process with pre-commit hooks  external link . TL;DR You will need imagemagick installed (use apt/yum/dnf of whatever you have there):...

Few years ago I moved from Linux desktop to MacOS for my business, day to day work. There were 2 main reasons for that: Corporations don’t like Linux - they can’t manage it, they can’t support it, so they blocked it with “Security policy”, ISO20001, or other nonsense. Actually they’re partially right but in different place - many business collaboration applications don’t work well on LInux (or they don’t work at all) Skype for Business - there’s open source alternative but to get full support you have to pay for additional codecs (as far as I remember) - it’s not working stable even in paid version Outlook and calendar support - I love Thunderbird and I use it for years, but calendar invitations didn’t work nice (honestly, they didn’t work nice even between different Outlook versions…) Corporate VPN apps - Christ, I always was able to get it working eventually, but… why bother I’m older, maybe lazier, maybe smarter - I don’t like to spend my time resolving problems that don’t give me any value....

I had stragne statistics on one memcached servers. I had to look what it’s doing there. I found such commands that may be used to sniff, extract and make statistics from running memcached server. Debug GET commands tcpflow -c dst port 11211 | cut -b46- | grep ^get cut command will remove 46 bytes at beginning of every string (src, dst, port). You may need to adjust numeric parameter for cut to leave commands only....

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 before and it was exactly what I was searching for. Configuration of Skylake based notebook right now is not straightforward - there are still glitches and small bugs that are waiting to be fixed....

From few days I have access to UPC’s www.horizon.tv  external link platform - until now it was useless on Linux. But there is Pipelight that will use Wine to emulate Silverlight on Linux and it’s working pretty well - you’re just few commands away from achieving that: # stop browser killall firefox # remove old version if you have it sudo apt-get remove pipelight Now configure repos and install packages:...

I just bought new wifi card for my desktop computer. Like in topic, it’s Intel Dual Band Wireless-AC 7260 for Desktop  external link . I was searching for card that: support AC standard have 5GHz network support (2,4GHz channels are cluttered heavily in my neighborhood have PCI/PCIx or USB3 connector is Linux friendly (no modules compilation by hand, support for aircrack-ng, kismet) This one is the only I found that comply my expectations....

There are many possible real life cases and not all optimization technics will be suitable for you but I hope it will be a good starting place. Also you shouldn’t copy paste examples with faith that they will make your server fly 😃 You have to support your decisions with excessive tests and help of monitoring system (ex. Grafana ). Cache static and dynamic content Setting caching static and dynamic content strategy may offload your server from additional load from repetitive downloads of same, rarely updated files....

Sometime you need to make quick and dirty image backup of VM running on XenServer and this post is about such case 😃 List machines: xl list Name ID Mem VCPUs State Time(s) Domain-0 0 4066 8 r----- 3526567.3 webfront1.example.com 1 4096 4 r----- 3186487.2 webfront2.example.com 2 2048 2 -b---- 920408.2 Now you may export one: xe vm-export vm=webfront1.example.com filename=/srv/backup/webfront.xva Export succeeded You may also use uuid for that - list machines with xe vm-list (best with less) and then:...

Sometimes deployment process or other heavy task may cause some Nagios checks to rise below normal levels and bother admin1. If this is expected and you want to add downtime on host/service during this task you may use this script: #!/bin/bash function die { echo $1; exit 1; } if [[ $# -eq 0 ]] ; then die "Give hostname and time in minutes as parameter!" fi if [[ $# -eq 1 ]] ; then MINUTES=15 else MINUTES=$2 fi HOST=$1 NAGURL=http://nagios....

Now when you have CollectD and InfluxDB installed you may configure Grafana 😃 First configure repo with current Grafana version (select your distro): curl https://packagecloud.io/gpg.key | sudo apt-key add - deb https://packagecloud.io/grafana/testing/debian/ wheezy main Now install package (on wheezy I needed to install apt-transport-https to allow installation of packages from repo via HTTPS): apt-get update apt-get install -y apt-transport-https apt-get install -y grafana By default Grafana will use sqlite database to keep information about users, etc:...