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Bash ‘swallowing’ sub-shell children process when executing a single command
Bumped into an unexpected bash/sh behavior and I wonder someone can explain the rationale behind it, and provide a solution to the question below. In an interactive bash shell session, I execute: $ bash -c ‘sleep 10 && echo’ With ps on Linux it looks like this: _ -bash _ bash -c sleep 10 &…
Buildroot: install and build the toolchain only
I want to install and build just the toolchain for my Buildroot project. make help suggests that the command make <options> toolchain should work; however, running that command simply returns Nothing to be done for ‘toolchain’. and output/host is never created. Answer You first have to confi…
How to add android studio into rofi menu in i3wm? [closed]
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations. Closed 5 years ago. Improve this ques…
Unable to route webcam video to virtual video device on Linux (via OpenCV)
I would like to put a video overlay onto an incoming webcam stream via OpenCV. As a first step I’m trying to stream the incoming video from a webcam at /dev/video0 to a virtual video device at /dev/video1 (v4l2loopback). Unfortunately I’m not able to forward the webcam stream to the v4l2loopback d…
First time using MySQLdb in Arch Linux (Manjaro) show error
it’s first time i using MySQLdb on python and i using Manjaro, when i tried to run my program. The error always show like : Many people suggest me to add file mysqld.sock ang yes i did it, but still error with the same error. And i get suggest to install mysql-client, python-mysql-connector, mysql-pytho…
How to rename file name contains backslash in bash?
I got a tar file, after extracting, there are many files naming like I want to correct their name into files in sub-directories like I face a problem when a variable contains backslash, it will change the original file name. I want to write a script to rename them. Answer Parameter expansion is the way to go.…
Copying files from multiple directories into a single destination directory
There are multiple directories which contain a file with the same name: Now I want to extract them to another directory, direct_new and with a different file name such as: How can I do this? BTW, if I want to put part of the name in original directory into the file name such as: What can I do? Answer This
How to use –since option with docker logs command
I want to look at last 1 hour of docker container log using docker logs –since option. Which value I should provide for –since parameter? Answer as the help says –since string Show logs since timestamp (e.g. 2013-01-02T13:23:37) or relative (e.g. 42m for 42 minutes I would do docker logs myc…
In Python, how do I get user’s remote IP (their last hop) if they’re connected over SSH?
I want to detect if the user is connected over SSH. In a term, the “env” command shows SSH_CONNECTION line. Accessed in Python in one of two ways: But, if the user has ran my program using SUDO (as they will need to), env$ dooesn’t show SSH_CONNECTION. So Python can’t see it: The aim i…