Installing Kali Linux on VirtualBox is fastest with the pre-built image from Kali’s own site, which skips the ISO installer entirely. Download the image, check its checksum, and set the VirtualBox options that make the machine boot. What You Need Before the Download The image is the same on Windows, macOS, and Linux hosts, but
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The zip and unzip commands are separate programs, and the one that packs your files returns exit code 0 whether or not it stored anything. That is how you can run zip plain.zip project, read the single line adding: project/ (stored 0%), and finish with an archive that holds no files. I ran the whole
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nc is three programs sharing one name, and the option table you find usually belongs to the wrong one. On Ubuntu and Debian the nc in your PATH is netcat-openbsd, which dropped the flags that netcat-traditional and Nmap’s ncat kept, so a line copied from a guide about either of those fails the moment you
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I tested the group-based and file-based ways to add a user to sudoers on a current Debian-family system, including syntax validation with visudo and permission checks with sudo -l. Use the sudo group for a normal administrator, and use a sudoers.d rule when you need narrower or separately managed access. Choose the method that matches
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I ran touch empty.txt and stat reported empty.txt as 0 bytes, then checked writes, appends, standard input, and editor-based creation. Choose the method by the result you need: a blank file, controlled text, typed input, or an interactive editing session. Choose the method that matches the job Linux creates a file when a command opens
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I checked four version commands on Ubuntu 24.04.4 LTS and matched each one to the job it serves. Use lsb_release for a quick report, /etc/os-release when a script needs stable fields, and hostnamectl when the kernel belongs in the same check. These commands need no administrator access. Start with the shortest answer, then choose a
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Nano and Vim solve the same terminal task with different editing models. Nano lets you type immediately and keeps its shortcuts visible. Vim separates typing from commands and rewards faster navigation once you learn its modes. The commands below match GNU nano 7.2 and Vim 9.1 on Ubuntu. What changes when you press a key?
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Find your private IP with ip -br addr and your public IP with curl, wget, or dig. Commands run on Ubuntu 24.04, with ifconfig mapping and a script.
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Ubuntu and Lubuntu are not simply a fast and slow version of the same desktop. Ubuntu gives you the mainstream GNOME desktop, while Lubuntu gives older or modest hardware a lighter LXQt desktop with the same Ubuntu base. For a current installation, start with the official Ubuntu Desktop download or Lubuntu’s download page and verify
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Scripts run my automation on every Linux box I maintain, and the first launch often stops on a message that looks fatal but isn’t. The execute bit is missing, or the shell can’t find the file, or the script expects a different interpreter. Each launch path below comes with tested commands and the exit code
How to run a .sh file and Shell Scripts in Linux? Read More »