Want to create a new Terminal window from a tab on the Mac? It can be done, but how it works may depend on what Mac OS system software version you are using and therefore what version of the Terminal app is in play. In Mac OS X, the Terminal app reacts differently than Safari … Read More
You can quickly retrieve active DNS server IP addresses on any Mac by using the networksetup utility. This is done from the command line, so launch the Terminal app and type one of the following command strings, dependent on the version of OS X that is running on the Mac.
Sometimes the easiest fix when troubleshooting an AirPort wireless connection problem is to just turn AirPort on and off. Instead of using the menu item or System Preferences, we can enable and disable AirPort very quickly directly from the Mac OS X Terminal.
Don’t want to wait for the full screen Terminal in Mac OS X Lion? Me neither, and we don’t have to thanks to iTerm2. The latest build of iTerm2 features the ability to enter into a true full screen terminal mode. Just launch iTerm2 and hit Command+Return to enter into full screen. One of our … Read More
Terminal.app is getting a subtle facelift in Mac OS X Lion with a couple nice interface changes. First up is the ability to adjust blur on opaque (transparent) terminal windows, the effect is done on the fly and anything behind the transparent terminal window gets blurred. The image above shows this with a blurred terminal … Read More
If you’re tired of the antiquated (retro?) text-only appearance of the command line and Terminal.app, check out the fascinating new TermKit project. TermKit aims to bridge aspects of the GUI with the command line, allowing this re-imagined terminal to see anything from icons to images, with progress bars and indicators that commands have executed successfully … Read More
The top command is a great way to get a quick overview of how your system is performing and how apps are using your resources. If you are unfamiliar with it, it’s basically a command line task manager like Activity Monitor and it shows processor usage, memory usage, disk activity, load average, and other helpful … Read More
You can run multiple instances of any application in Mac OS X with a little command line magic. Using the ‘open’ command to launch GUI apps from the Terminal, we can run a new instance of any app, even if it is already running.
Some of the most secure passwords you can use are those that are randomly generated. From the command line, you can randomize potential passwords in a multitude of ways, which can be used as secure passwords of generated characters. We’ll cover several primary methods of generating random sequences and then show you how to combine … Read More
If you like to keep an eye on system resources and you want to branch out from the GUI Activity Monitor, check out htop for Mac. htop is basically a significantly improved version of top, which lets you monitor system resources, CPU core load, memory use, load averages, and view and manage individual running processes. … Read More
Do you have some source code, text, or a command string that you want to securely transfer from one Mac to another? Combining the command line clipboard tools pbcopy and pbpaste with SSH we can do exactly that, and it doesn’t matter where the other Mac is located: be it LAN, WAN, or anywhere. Here … Read More
You can quickly change the appearance of any Terminal window by using the Inspector tool in the Terminal app for Mac, which can be summoned at any time for any specific Terminal window or tab. Inspector is very easy to use, so here is how to change the appearance quickly using it:
Much like you can monitor Mac OS X filesystem usage through the command line, you can also discover what apps and individual processes are currently using your Macs internet connection. This is a really handy trick if you know your bandwidth is being used by something, or if you’re just trying to track down what … Read More
If you don’t want your MacBook Pro to wake from sleep when you open the lid of the machine, all you need to do is launch the Terminal and type the following command:
You can quickly retrieve any Macs serial number via the command line by using the ioreg or system_profiler command and grep for the serial string. Getting the serial number from the command line like this can be helpful for troubleshooting, Single User Mode, remote management with SSH, or for many other reasons, though most users … Read More
The opensnoop utility is an amazing tool for tracking down specifics like what files specific applications are accessing, but you can also use opensnoop to monitor all filesystem access in Mac OS X. To do this, run the utility with no flags attached: sudo opensnoop You’ll be asked for your root password, and then you’ll … Read More
If you’re troubleshooting some of the more difficult problems that you can have on a Mac, a good place to look are the System & Kernel Logs contained within Console app. But you can access the same OS X logs from the Terminal too.
If you’re coming to Mac OS X from elsewhere in the unix & x11 world, you might be used to the focus of Terminal windows following your mouse cursor. With a little command line magic, we can enable this hidden feature in the Mac OS X Terminal.app too.
