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For an email signature, what is the “ideal” CDN image hosting provider?

Email signatures typically have an image of a logo or a profile picture. My question is, what is your recommended image hosting URL/service? Are some URL’s trusted over others? I am not sure where to host these images hence the question. I guess some ISP’s and email clients determine the "trustworthiness" of an image URL? […]

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Bitcoin Cryptocurrency Mastering Development

LND doesnt create macaroons or directories

I installed lnd and got to the point of creating a wallet with "lncli create" but I get an error "unable to read macaroon path" and gives the path of where the macaroon should be. I believe when you start lnd for the first time it creates these macaroons along with some other files and […]

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Linux Mastering Development

the structure of the virtual memory of a Linux process

I’m reading a textbook which shows virtual memory as: Linux also maps a set of contiguousvirtual pages (equal in size to the total amount of DRAM in the system) to the corresponding set of contiguous physical pages. This provides the kernel with a convenient way to access any specific location in physical memory I am […]

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Linux Mastering Development

What does UEKR mean in Oracle Linux?

All files in Oracle Linux have a UEK suffix, e.g kernel-uek-debug-devel-4.1.12-124.35.2.el7uek.x86_64.rpm What does it mean?

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Linux Mastering Development

can i install linux debian on rooted android device

most of you know you should unlock bootloader to root android device, and unlocking the bootloader give you the ability to install other ROM "as far as i know". so is it possible to go crazy and install linux debian on android device, if yes what are the things that i should keep in mind […]

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Linux Mastering Development

How to avoid killing a wrong process when using PID number for killing?

I’m starting a long-running background process inside a Bash script. I’m saving the PID number after sending the process to background and since that process has that PID number as long as it runs, when I kill the process by using that number, that exact process would be killed. However, if the background process terminates […]

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Linux Mastering Development

Is it possible to connect an ipvlan to a KVM guest vm? As opposed to a macvlan

I have a nested guest in a shared infrastructure environment with Mac port security. I would like to use a unique public Ip on this vm, however all outbound and inbound traffic must use the single Mac address of the hosted vm. It looks like the capability of a ipvlan interface will achieve this, however […]

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Linux Mastering Development

Merge two folders with overlapping incremental file names by renaming files in Bash terminal?

I have two folders with overlapping incremental file names. folder1/ pic001.jpg, pic002.jpg, pic003.jpg, pic004.jpg, pic005.jpg, pic006.jpg, pic007.jpg folder2/ pic001.jpg, pic002.jpg, pic003.jpg, pic004.jpg, pic005.jpg, pic006.jpg, pic007.jpg I want to rename all the files from folder2 to place after files in folder1 (folder2/pic001.jpg -> folder1/pic008.jpg, folder2/pic002.jpg -> folder1/pic009.jpg, etc). I have been messing around with a python […]

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Linux Mastering Development

CentOS 8 not finding Nignx 1.16 software

In my CentOS 8 server, when I update (yum upgrade) its not finding the latest version of Nginx software. it stays on 1.14 version. How to update the latest Nginx version? # yum list nginx –showduplicates Last metadata expiration check: 2:27:24 ago on Sun 20 Sep 2020 03:12:40 PM EDT. Installed Packages nginx.x86_64 1:1.14.1-9.module_el8.0.0+184+e34fea82 @AppStream […]

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Linux Mastering Development

How to reliably find Linux disks in /dev?

Cross post from https://stackoverflow.com/q/63976722/4534 Previously we used /dev/[sh]d? … but now with the advent of NVMe SSDs /dev/nvme* drives, this is no longer true. Do you know how to find install disks? Or to update the /dev/[sh]d match? Or use /proc/partitions?