How to check if user name or ID has been compromised in a data breach

When data breaches occur, there are various kinds of data that get compromised. The most critical data that can get compromised is the user name or ID or the password. All is not lost due to a great service hosted by Troy Hunt. Use https://haveibeenpwned.com/ to check if the User name or user ID appears … Continue reading How to check if user name or ID has been compromised in a data breach

Remember History in Firefox 75+ and private browser windows

Mozilla Firefox 75+ has made a change in the way it determines whether web sites open in a private window or not. This is now tied in with the "Remember History" option in Preferences -> Privacy and Security option. To enable Private Windows all the time, select "Never Remember History", but to disable private windows, … Continue reading Remember History in Firefox 75+ and private browser windows

Recover encrypted ecryptfs home folder from encrypted dm-crypt luks disk volume

Whew... saved by the skin of teeth. The grub2 bootloader of my computer got corrupt. I was not able to boot into the computer and all was lost. For security reasons, I set up LVM with full disk encryption. Thereafter, each user's home folder was further encrypted with ecryptfs (the default you get when you … Continue reading Recover encrypted ecryptfs home folder from encrypted dm-crypt luks disk volume

How to disable user list and guest user login in Ubuntu 16.04 LTS

To disable the user list and guest user login in Ubuntu 16.04 LTS login screen, open a terminal window and do the following: $ cd /etc/lightdm <enter> $ sudo mkdir lightdm.conf.d <enter> $ sudo cd lightdm.conf.d <enter> $ sudo mousepad 50-config.conf <enter> Enter the text below into the file. [SeatDefaults] greeter-hide-users=true greeter-show-manual-login=true allow-guest=false Save the … Continue reading How to disable user list and guest user login in Ubuntu 16.04 LTS

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 extend expiry date of Gnu Privacy Guard Keys (GPG/PGP) keys

When PGP/GPG keys expire, you have option to generate a sub key (if you think your key has been compromised), or you can extend the validity of the current key by extending it's expiry period. You can extend the key's expiry period since the keys are not compromised. To continue, Open a terminal window and … Continue reading How to extend expiry date of Gnu Privacy Guard Keys (GPG/PGP) keys

How to set up an isolated Guest WLAN on TP-Link WDR4300 with OpenWRT using command line

You have guests at your home and they want to use your wireless network to retrieve emails, etc off the Internet. This is not a unique situation, but is quite common everywhere, with the proliferation of devices and services that require Internet access. The only issue you face is that if you give them your … Continue reading How to set up an isolated Guest WLAN on TP-Link WDR4300 with OpenWRT using command line

Workaround to the Android Web Browser Vulnerability on old devices

If you are one of those who has an older Android device, you are vulnerable to the Android Web Browser vulnerability, whose patch may have not been released by your handset manufacturer. There is still hope for you to keep yourself safe and secure by any of the following methods: Disable the internal default web … Continue reading Workaround to the Android Web Browser Vulnerability on old devices

Fix google-drive-ocamlfuse not able to get token error

The google-drive-ocamlfuse not able to get token error appears when using google-drive-ocamlfuse access to google-drive-ocamlfuse application to Google Drive has been revoked or not granted. If the above error appears, delete the .gdfuse folder and a new token will be generated when google-drive-ocamlfuse application is run again. Open the file manager and remove the folder … Continue reading Fix google-drive-ocamlfuse not able to get token error