How to calculate MD5 or SHA256 sums in Linux and Android

Many of us use Linux Distributions like Ubuntu, Fedora, available for free on the Internet. To install these distributions on our computers, we need to down their ISO files. Recently, the Linux Mint ISO was hacked and malware inserted into some of it's files. It was then repacked and put up on an external website. … Continue reading How to calculate MD5 or SHA256 sums in Linux and Android

How to annotate PDF files on Android devices using Xodo

There are several tools to annotate PDF files. Some are non-free like Adobe Acrobat Writer and others, and some are free like Xournal on Linux. Xournal is a very powerful annotator, whereby, the original file is untouched, but a separate file of the annotations done on top of the original PDFs is maintained. You can … Continue reading How to annotate PDF files on Android devices using Xodo

Connection error retrieving mail, gtalk, play store on android due to time change

Google provides a good list of diagnostics instructions that you can perform when you get Connection Errors retrieving email, or starting GTalk or the Google Play Store. These are an exhaustive list, but you can get this error for one more reason. If you remove the battery and the SIM card from the phone and … Continue reading Connection error retrieving mail, gtalk, play store on android due to time change