Rants about Linux, technology, and science
I’ve seen several articles on the Internet about the “dangers” of citric acid as food additives. Citric acid is a popular food additive that is used for many purposes, ranging from imparting a sour taste to preserving food freshness by retarding bacterial growth. Among those who believe citric acid is dangerous, the most common reason Read More …
Overview The Python package “python-future” can be installed to permit Python3 scripts to run under Python2, and/or to convert Python2 scripts to Python3. Installation To install python-future to a Python2 build, simply load the necessary Python module (or use the native Python2 installation) and run: pip install future Using or Conversion Experience has shown that Read More …
Overview This howto outlines the procedures for creating a bootable version of Hirens on a USB drive using Linux. The problem arises when attempting to create the the bootable USB using the traditional (and generally reliable) isohybrid + dd approach. There is one fine which needs to be renamed, and in order to do that, Read More …
Use this nifty block of code: ip
This simple Linux command one-liner will give you the process name, PID, and memory usage in kb: for file in /proc/*/status ; do awk ‘/^Pid|VmRSS|Name/{printf $2 ” ” $3}END{ print “”}’ $file; done | sort -k 3 -n -r | less Produces something like the following: R 19173 8206748 kB R 19305 7097212 kB clamd Read More …
In Linux, there is a relatively simple way to track memory and swap usage by process. First look to the directory “/procs”. Here you will see a list of subdirectories named by running process ids (PIDs). Each subdirectory contains files and other directories that contain useful information about that process. For the metrics we want, Read More …
To delete all files in the current directory (and all subdirectories) based on age (in this case, 7 days), you can use the following: find `pwd -P` -mtime +7 -ctime +7 | xargs -I {} bash -c ‘if [ ! -d {} ] ; then \ echo {}; fi’ | xargs -I {} rm -f Read More …
Swedish Snus has been studied by the Swedish and British medical establishments and is believed to be between 90-99% less harmful than cigarettes. There is no evidence that it causes oral cancer, or contributes to heart disease. The Swedish medical establishment has already endorsed it as a form of “harm reduction”, as has the Royal Read More …
Overview Google search engine indexing can be facilitated through the creation of a sitemap. Once the map has been created, you will need to sign-up for Google Webmaster Tools (now called “Search Console) and Google Analytics accounts. Webmaster tools will permit you to submit your site for indexing. Once your web properties are indexed, you Read More …
Back in December 2014, I wrote a post on Let’s Encrypt – a TLS Certificate startup that plans to offer free 3rd-party certificates to anyone that owns a domain name. At that time Let’s Encrypt had set a target release date of “Summer 2015”. Let’s Encrypt recently moved their launch back with the following tentative Read More …