Normally we'd use dd to clean wipe a hard drive as follows after opening a terminal window for a hard disk or USB drive accessible as /dev/sdb :$ sudo dd if=/dev/urandom of=/dev/sdb status=progress <enter> Another command to do a secure wipe of /dev/sdb is scrub that can be used as follows:$ sudo scrub -p dod … Continue reading How to securely wipe a hard drive or USB drive in Linux using dd or scrub
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
An IT person is not worth their salt, if they do not experiment with any equipment or device they lay their hands on. Here is my experience with the XOSP Nougat version for Sony Xperia ZR (dogo). I enthusiastically installed XOSP on my Sony Xperia ZR using this ROM file XOSP-OFFICIAL-20170527-dogo.zip, downloaded from the https://xosp.org … Continue reading Not able to install Resurrection Remix 5.8.3 after installation of XOSP Nougat on Sony Xperia ZR (dogo)
As the commands entered below have the potential to cause inaccessibility to files or data, make sure you have taken a data back up first. Once you have backed up your data, proceed as follows. Do not proceed further if you are not confident or aware of what you are doing. Proceed as below at … Continue reading How to change UID & GID in Linux for any user
If you ever need to enable the root user in Ubuntu 14.04 LTS linux installation, you can do so as follows:Open a terminal window and type the following commands:$ sudo su -c <enter># passwd root <enter> Enter a strong password and restart the computer. To make sure that you can login as root, open a … Continue reading How to enable and disable root user in Ubuntu 14.04 LTS
Security can never be accepted in a compromised state. There are lots sites on the internet that offer options to root and update the ROM of android phones. However, goodies sometimes come packed with malware. Exercise caution when doing so. Other than that, you also void your phone warranty.