I am new to Selenium and have written a code to run a test case in firefox’s headless mode. It is working on Windows 7 but when I tried to do the same on Centos 7.3 OS using RemoteWebDriver running into this exception. I even specified the driver version in the DesiredCapabilities but no luck. I have ev…
In Bash scripting, are commands following an ‘&&’ operator considered child processes of the preceding command?
I’m trying to make sense of the scoping precedence of environment variables in Bash. I’ve come to understand that when you use a script to modify environment variables, those modifications are only available to child processes. That each script creates its own environment scope it can modify and t…
Linux Grouping and Counting Files by attribute
I am trying to return a list of the months that files were created using the following code. I am using the below code to validate each output. However as you can see from my output: Output of ls|grep I end up with 1 record showing no date. Also both January and December are short by 1. Can anyone assist?
Linux sed – remove at start and at end without delete the middle syntax
I am trying to make a automate script. I am stuck at the place where I take source code line like: I want the script to always remove the text before and after “Seller Refurbished”. I know that “Seller refubished” is a variable that can change. After sed I want this result: Answer
Keep gcc linker from using non-system libraries found in system /lib64 folder
I am porting a large C++ library (libcoro.so) and example application (coro-example.cpp) from Windows to RedHat Linux 7.4. I have very little development experience on Linux, so this is probably a ‘newbie’ question. I have libcoro and the example app compiling, linking, and running on my RHEL 7.4 …
OpenCV different results on Windows and Linux
I’m writing a cross-platform wrapper for OpenCV on rust. And I wrote several tests to check that my wrapper is working correctly. Some tests are passing, some tests are failing with slightly different values, but one test has completely different results. Right number is what I get on windows, left R…
Preventing background process from writing to console
In Linux’s bash, I know how to start a long running process and send it to the background. For example run.sh, then press Control+Z, then type bg 1 Sometime I would like to continue do other work, but this background process keep printing to my Putty console – which is annoying. I know I can start…
Interruption of signal handler with other signal?
Can a signal handler be interrupted by another signal (except of SIGKILL, SIGSTOP)? Therefore, do I need to check for EINTR in my signal handler when calling interruptable syscalls? (Linux and other Unixes) Answer Yes, the execution of a signal handler may itself be interrupted by the delivery of another sign…
Python installation in custom directory (Linux): PIP not working
I have installed Python3.6.4 in a Linux machine, under a user directory, lets say /drive/username/Python3.6.4 I’ve setup my path and aliases, and Python is working properly (i.e. executing python3 puts me in the correct environment, which python3 produces: /drive/username/Python3.6.4/bin/python3) The pr…
Kafka broker crash every day – OOM killer
I have a cluster of 3 kafka brokers Version 0.10.2.1. Each broker has it’s own host 2 cpu / 16G RAM, In addition we are using docker to wrap the broker process. The problems is as follows: Almost every day at the same time we see all of our kafka clients failed for 10 minutes. At the beginning I thought