Nmap is a powerful command line network discovery utility that lets you review network inventory, host response and uptime, and perform security auditing through port scans, OS and firewall detection, and more. Though it’s free (and open source) and ships along with many versions of linux, it doesn’t come standard with Mac OS X installations, … Read More
Longtime command line users are probably familiar with the text based web browser lynx, which strips down the web to text-only format and allows for super-fast web browsing. But lynx (links, technically) can be compiled to support graphics and run within x11, which creates a highly effective web browser for low-bandwidth situations because it strips … Read More
Activity Monitor and the traditional ‘kill’ command line tool are able to handle most process termination needs, but if you’ve ever needed to target and kill all processes belonging to a single user account, you know it can be a frustrating task. Though Activity Monitor allows you to sort “Other User Processes” and select multiple … Read More
Those familiar with the command line know that running things with super user privileges is typically just a matter of using the sudo command. That still holds true with launching GUI apps into the OS X with root privileges, but it’s not just a matter of prepending sudo to the otherwise useful open command, because … Read More
The standard terminal appearance is just boring old black text on a white background. Apple included a few nice preset themes too, but to really make your terminals appearance stand out you’ll want to take the time to customize it yourself. While some of these tweaks are admittedly pure eye candy, others genuinely improve the … Read More
By turning Option into the Meta key, you will be able to use familiar meta commands to jump around and navigate text in places like Emacs or bash shell without twisting your fingers around to poke at Esc. This won’t be applicable or useful to everyone, but it’s one of those must-use tricks for frequent … Read More
If you’ve ever wanted to document your reaction to an event, task, or specific command execution, now is your chance to get started. With the help of a fun little app called ImageSnap, you can snap pictures with the FaceTime or iSight cameras from the command line. That can be good enough on it’s own … Read More
Ever wanted to see not only every file in a given directory, but all files within that directories buried subdirectories? If you’re looking for what is basically a recursive listing of files in a given folder, we’ll show a great trick for the Mac OS Finder that allows you to do just that, and also … Read More
MTU stands for Maximum Transmission Unit, and a larger MTU size generally increases efficiency of a network connection because each packet carries more data, but sometimes the default MTU sizes (often 1500) will cause issues with some networks and needs adjusting. If you need to change the MTU size on a Mac, you can do … Read More
Converting images to new file formats is very easy thanks to a variety of tools built directly into OS X (and most Linux distributions). Though the easiest method uses Preview for converting images, there’s a command line option that uses the same sips tool we’ve discussed before to perform batch resizing from the command line. … Read More
Retrieving a list of preferred wireless networks can be helpful when troubleshooting wi-fi problems, amongst other reasons too. If you’re looking to print out a list of wi-fi networks the Mac has used as preferred and connected to before, the following trick will do just that!
Knowing which wireless networks a Mac has been connected to in the past be can be helpful for a variety of reasons, including network troubleshooting, determining where a Mac has been, if a specific wifi password is recoverable, and a myriad of other technical reasons. Searching for past networks is completely different from finding currently … Read More
If you’re a frequent command line user, you’re likely to have found the history command to be quite useful before, whether it’s for discovering your most frequently used commands, dumping history and searching it to find specific past commands, listing all defaults commands used, or whatever else. That said, there are some obvious situations where … Read More
The command line is often considered the realm of advanced users, but that doesn’t mean every usage of Terminal has to involve rocket science. This collection of terminal tips should apply to a wide variety of Mac users, and everyone from beginners to advanced users should find something worthwhile here.
Advanced Mac users may have noticed that X11 is no longer bundled with OS X, and it’s also no longer available as a separate installation option through Developer Tools. Instead, to run X11 on OS X Mountain Lion (and later), you’ll want to download and install the free XQuartz system, which bundles all the necessary … Read More
Though most Mac users will likely prefer to use Preview to batch resize images because of the ease of use, advanced users often like to go with the command line for repetitive tasks. We’ve discussed sips before as a way to resize, rotate, and flip images, but if sips is combined with wildcards it can … Read More
The quickest way to add a file extension to a group of files that don’t currently have one is by using the command line in Mac OS X. In the example below, we’ll add a “.txt” extension to all files in a single directory, but subbing .txt in the command string will add a different … Read More
To compare and list the different contents of two directories without the extra output you get through commands like diff, you can use the comm command instead. To get started, launch Terminal and type the following command, adjusting the directory paths as appropriate: comm -3 <(ls -1 folder1) <(ls -1 folder2) The output listed will … Read More
