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Mastering Development

tidyverse function to `mutate_sample`?

I’m looking to mutate a column for a random sample, e.g., mutate_sample. Does anyone know whether there is a dplyr/other tidyverse verb for this? Below is a reprex for the behavior I am looking for and an attempt to functionalize (which isn’t running because I’m struggling with quasiquotation in if_else). library(dplyr) library(tibble) library(rlang) # Setup […]

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Linux Mastering Development Ubuntu

Fresh installation – How to resize (extend) /var partition? [closed]

I have just recently installed Kali Linux 2020.3 in dual boot with Windows 10 (separate M.2 NVMe SSDs). When performing the installation I opted to have each partition separate (/, /var, /home, …). Now when trying to run sudo apt upgrade I am getting this: 506 upgraded, 24 newly installed, 0 to remove and 24 […]

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Linux Mastering Development

Why inode numbers of /dev and /run are same as that of /? [duplicate]

Please see below output: In below output, the inode numbers of /dev and /run are same and equal to 2. The inode numbers of ./ and ../(could be a special case as ../ should point to ./) are also 2 and 2. How can dev and run and / have the same inode as there […]

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Linux Mastering Development Ubuntu

ubuntu 20 file system gui is readonly

i already installed Ubuntu 20 and i wanted to know how i can make the +other locations folder which shows system folders like the /etc , /var , . . . full access because now when i browse and try to edit any file its read only in the GUI editor i can edit them […]

Categories
Mastering Development System & Network

Why do a lot of people do not use seperate partitions anymore?

Knowing Linux and FreeBSD distributions on CD, I grow up giving each directory like /usr, /var, /opt, and so on, its own partition One of the holy rules was, that / must be protected from running full. Nowadays I see very often systems, where even /tmp or /var is on the root partition and systems […]

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Mastering Development

Maxwellian Distribution in Python Scipy

In the article that I am interested in, it states that the data is well represented with a Maxwellian distribution and it also provides a Mean speed (307 km/s) and 1 sigma uncertainty (47 km/s) for the distribution. Using the provided values, I have attempted to re-generate the data and then fit it with the […]

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User Help

Bash: How to eliminate a comma at the end of a variable generated by a loop

I have the following bash script which outputs two random numbers on the same line. #!/bin/bash for i in 1 2; do unset var until [ "$var" -lt 10000 ] 2>/dev/null; do var="$RANDOM" done printf "%s," "${var/%,/}" done The output is: 5751,2129, I am trying to get rid of the comma at the end of […]

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Linux Mastering Development Ubuntu

Unable to locate package after manual uninstall

I installed waterfox from a third party repository using apt. I completely forgot that I installed it using apt and uninstalled it manually. When running apt remove waterfox, I receive a message "E: Unable to locate package waterfox". I scanned through /var/lib/dpkg/status and uninstalled all waterfox related items. I’ve also searched the filenames of /etc, […]

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Mastering Development

Python, sympy: A simple set of equations involving repeated powers gives nonsensical (to me!) answers

I am new to both python and the sympy module so some of my code may be a bit ‘primitive’. This is also my first use of Stackoverflow so forgive any use errors. I have included an entire test function which can be called using TEST() [this is a simplified version of my actual work, […]

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Linux Mastering Development

Setting physical and logical partition types when setting up mount points?

I’m new to Linux and I need help with understanding partition types when setting up mount points. So I’m doing a project where I have to set up mount points for: /boot /var /home swap /tmp / So far, setting up the type of file system, size and options are quite straight forward. However, the […]