How to validate digital signature in a document in Linux

In Linux, libreoffice-draw has the ability to open and validate digital signatures. Unfortunately, this functionality is broken as of today in the seahorse or gnome-keyring on LinuxMint 19.2 Tessa. This is due to the Ubuntu repository not having an updated package or a bug in seahorse. Without digging into above, a different program named PDFStudioViewer … Continue reading How to validate digital signature in a document in Linux

Shared hosting and WordPress

WordPress had recently upgraded it's code to work with PHP 7. Subsequently, each time I logged into the hosting provider account, I was always reminded by WordPress to upgrade the WordPress code and stay up to date with the latest security patches. Unfortunately, the hosting provider informed that the latest PHP 7 scripting language could … Continue reading Shared hosting and WordPress

How to hash files in Windows 10 into a file

Getting the MD5 hash of a file on Linux is very easy. However, in Windows, there are several utilities, but using Windows internally inbuilt command certutil, it can be done as follows in the Windows shell: C:>for /r %%f in(x) do (certutil -hashfile "%%f" MD5) >> output.txt output.txt will contain the files with their MD5 … Continue reading How to hash files in Windows 10 into a file

How to debloat, remove crapware from Xiaomi Redmi Note 5 Pro smartphone

Never look a gift horse in the mouth.. If you are one of those who is a technology connoisseur and love to compare specifications of smart phones before making a purchase decision, you need to be aware that the Xiaomi Redmi Note 5 Pro with 6 GB Internal RAM, best display and camera is a … Continue reading How to debloat, remove crapware from Xiaomi Redmi Note 5 Pro smartphone

Error when opening a LUKS encrypted container file /dev/loop0 Device or resource is busy on Ubuntu 18.10 Gnome Desktop

When you enter the command below in a terminal window: $ sudo /sbin/losetup /dev/loop0 /home/user1/folder1/containerdatafile <enter> Device error or resource busy error message appears and the device is not setup. The reason is that /dev/loop0 is taken by snap. To overcome the error, change /dev/loop0 to something else like /dev/loop35 Or, if you do not … Continue reading Error when opening a LUKS encrypted container file /dev/loop0 Device or resource is busy on Ubuntu 18.10 Gnome Desktop

How to add user with encrypted home folder in Xubuntu 18.04 LTS or Ubuntu 18.10

After a long while, upgraded from Xubuntu 16.04 LTS to Xubuntu 18.04 LTS and was in for a surprise. No encrypted home folder. Support for this was dropped as ecryptfs-utils was no more maintained by it's maintainer. However, fret not. Encrypted home folders can still be created as below. Make sure you take a backup … Continue reading How to add user with encrypted home folder in Xubuntu 18.04 LTS or Ubuntu 18.10

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 restore TWRP recovery after encrypting internal storage on LineageOS 14.1 on Motorola G 2014 (titan)

I installed LineageOS 14.1 on an old Motorola G 2nd Generation (2014) android phone, also known as titan. All went well and it worked like a charm. I wanted to encrypt the internal storage and accordingly, did so from the Settings -> Security option on the phone. It worked well and said the phone was … Continue reading How to restore TWRP recovery after encrypting internal storage on LineageOS 14.1 on Motorola G 2014 (titan)