Let us test your basic knowledge of Linux systems, including commands.
an you explain DEBIAN_FRONTEND apt or apt-get variable? How and why I need to use this in Docker or shell scripts under a Debian and Ubuntu Linux?
ow do I see how many processes are running in Linux? How can count all running processes in Linux?
set up a new cloud server, but my auto-completion of bash shell commands are not working. How do I enable autocomplete feature in CentOS 8 (CentOS Enterprise Linux 8)? How do I write simple bash completion code in CentOS 8?
need to find and return the PID of the last command executed in Linux. How do I return the PID of command in Linux?
ow do I extract filename and extension in the Bash shell script from the given path? How can I get filename from the path under the bash shell?
ow can I find a website’s DNS address? How do I check the current DNS servers of a domain or website using a Linux or macOS command line option? How do I find DNS address of a website using bash?