Useful tips for everyday
How to extract the index of a column in Unix? Column 1 represents the index variable. I would like to use a basic UNIX command…
How to run a command in the background on Windows? On windows there are a number of options for what you are looking for: Best:…
How do I expire a SSL certificate? Steps to Renew SSL Certificate Generate a Certificate Signing Request (CSR) Select your SSL certificate. Select the validity…
How do you search for a string in a text file in Linux? Grep is a Linux / Unix command-line tool used to search for…
Can you capture stdout and stderr into different variables? They are simply ignores if they happen to occur in stdout or stderr. The given command…
What is VAR in shell script? A variable is a character string to which we assign a value. The value assigned could be a number,…
What does a logout do in a script? A logout in a script doesn’t affect anything, since logout only works for login shells, and scripts…
What does Cannot connect to SSL mean? The SSL connection error is quite common and it can be caused by multiple factors. Sometimes the problem…
Is there a way to split the screen in GNU? 1. Open a new terminal and execute “screen” This should present you with the command…
Can file descriptors be reused? Unlike process IDs, which are recycle only gradually, the kernel always allocates the lowest unused file descriptor when a new…