How to Adjust Screen Brightness on Mac from Command Line

How to Adjust Screen Brightness on Mac from Command Line

Want to change the screen brightness on Mac from the command line? You can use the Terminal to adjust screen brightness to be brighter or dimmer with a few different methods, as we’ll demonstrate here. First we’ll show you a handy way to increase or decrease Mac screen brightness using osascript at the command line,…

How to Fix Unzip Error “End-of-central-directory signature not found”

How to Fix Unzip Error “End-of-central-directory signature not found”

Rarely, you may attempt to unzip a zip archive and come across an error that states “End-of-central-directory signature not found. Either this file is not a zipfile, or it constitutes one disk of a multi-part archive. In the latter case the central directory and zipfile comment will be found on the last disk(s) of this…

How to Log Off Another Users ssh Connection by Command Line in Mac OS or Linux

How to Log Off Another Users ssh Connection by Command Line in Mac OS or Linux

Using SSH, or Secure Shell, is a very common way to establish remote connections to Mac and Linux machines from the command line. If you’re a systems administrator, or if you have SSH enabled on a Mac for another reason, you may eventually need to log off another users ssh connection. There are several ways…

How to Test ParrotSec Linux on a Mac with Parallels Desktop Lite

How to Test ParrotSec Linux on a Mac with Parallels Desktop Lite

Advanced Mac users who are interested in the world of Information Security (InfoSec) can easily test out ParrotSec Linux in live boot mode by using a virtual machine. In this particular walkthrough, we’ll show you how to quickly get ParrotSec running in live mode within the free Parallels Desktop Lite app, but if you want…

How to Use zsh as Default in Terminal for Mac OS

How to Use zsh as Default in Terminal for Mac OS

Zsh, or z shell, is a popular shell alternative to bash and tcsh, complete with many improvements and customization options offered through the Oh-My-ZSH project. If you’d like to use zsh as the default shell in Terminal for Mac OS rather than bash, you can do so rather easily with taking the following steps: How…

How to Get a Linux Shell on iPad or iPhone with iSH

How to Get a Linux Shell on iPad or iPhone with iSH

Have you ever wished you had a Linux command line on an iPad or iPhone? With iSH you can get pretty close to accomplishing that goal. iSH Shell is a Linux shell for iOS that uses an x86 emulator to run a simplified version of Alpine Linux on an iPad or iPhone. You can even…

How to Boot in Single User Mode on a Mac

How to Boot in Single User Mode on a Mac

Advanced Mac users can boot into Single User Mode, which loads directly into the command line of Mac OS and skips the familiar friendly user interface. Booting into Single User Mode on a Mac can be helpful for some troubleshooting purposes and administrative tasks, but is generally best reserved for use by advanced Mac users…

How to List All Homebrew Packages Installed on a Mac

How to List All Homebrew Packages Installed on a Mac

Want to quickly see all Homebrew packages installed on a Mac? You may already know the path where Homebrew packages are installed to, but you don’t need to list a directory structure to get a list of Homebrew packages that have been installed in Mac OS. Instead, you can issue a simple command to show…

Fix Terminal “Operation not permitted” Error in MacOS Mojave

Fix Terminal “Operation not permitted” Error in MacOS Mojave

If you’re a Mac command line user you may have noticed that many frequently used commands entered into the Terminal (or iTerm) result in an “Operation not permitted” error message since updating to MacOS Mojave 10.14 or later. The “Operation not permitted” error in the Terminal can be seen after issuing even simple commands like…