It’s been almost 12 years since using the 128 MB Transcend USB hard drive for data backups. On the other hand there’s also a 128 KB Transcend USB pen drive from 2006 that still works quite well today plus a Kingston 1 GB USB pen drive. In 12 years, storage device and storage media technology … Continue reading There’s something about data backups – what’s the big deal!
Tag: encryption
How to display the digital signature green tick in a signed PDF document using PDF Studio Viewer on LinuxMint or Debian or Ubuntu Linux
Signed PDF documents normally display a green tick when the signature is valid when opened with Acrobat PDF reader. Since a long time, Adobe Acrobat Reader is no more available for Linux and the best alternative to verify signed PDF documents is PDF Studio Viewer by Qoppa. Open the signed PDF file using PDF Studio … Continue reading How to display the digital signature green tick in a signed PDF document using PDF Studio Viewer on LinuxMint or Debian or Ubuntu Linux
How to use deja-dup for data backups on Linux
Deja-dup is a Gnome application. It can be used for data backups of the computer to a USB drive, another hard disk, folder or even to the cloud. Data backups are encrypted using the Gnu Privacy Guard (GPG) shared key as they are done. The first backup takes time, depending on the data to be … Continue reading How to use deja-dup for data backups on Linux
How to create and use LUKS encrypted partition in Linux
It is easy to create a LUKS container and a partition within it, using the GUI on Linux. The application that enables this easily is the gnome-disk-utility. However, if you want to use the command line to set up a LUKS encrypted device, read on. Exercise appropriate caution before doing any of the below with … Continue reading How to create and use LUKS encrypted partition in Linux
How to shred a file on Linux leaving no remnants
Sometimes we have files on our hard disks that we would like to remove for good. If you have set up full disk encryption when you installed Linux on your computer, you will have an encrypted hard disk which is pretty much useless to anyone without the password that only you know. However, sometimes, to … Continue reading How to shred a file on Linux leaving no remnants
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
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 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 encrypt swap partition on Ubuntu 14.04 LTS
If you installed Ubuntu 14.04 afresh, and selected home folder encryption, you will also get an encrypted swap partition. However, when the computer boots, you get the following error message: the disk drive for /dev/mapper/cryptswap1 is not ready yet or not present. Note that you need to have a proper data backup and make sure … Continue reading How to encrypt swap partition on Ubuntu 14.04 LTS
How to setup HTTPS for web interface in OpenWRT
By default, you can log in to the OpenWRT firmware installed on your router using http://192.168.1.1. However, if you want to add encryption on that connection, you need to be able to login using https://192.168.1.1. To do that, you need to enable HTTPS support on the router. To do so, open a terminal window on … Continue reading How to setup HTTPS for web interface in OpenWRT
askmeaboutlinux 