Using Disk Utility through Recovery Mode is the preferred and primary tool for repairing disks on the Mac platform, but if Disk Utility is either unavailable or not able to repair a drive, then Single User Mode and the command line tool fsck should be your next choice.
The command line interface is an alternate method of interacting with OS X, relying on text based command entry to execute commands and perform tasks. It is accessed on the Mac by using the Terminal application. Generally, the command line is considered advanced, and thus it’s usage tends to be more complex than many standard procedures on a Mac.
Search Command Line
The excellent curl and wget tools provide for a simple way to test the speed of an internet connection directly from the command line. Curl is bundled with most unix variations, but Mac users who want to use the wget trick will first need to grab wget for OS X in order for this to … Read More
Need to quickly get your external IP address from the command line for SSH or otherwise? No sweat, you can use either the curl command or dig to extract the information quickly from a variety of sources. We’ll focus on two different options that have proven to be reliable over time, the first is quite … Read More
Need to securely delete a file, group of files, or an entire directory, insuring that it’s quite literally never recoverable by any known possible means? You can do this easily from the command line with the help of an incredibly powerful tool called srm. srm, as you may have guessed, stands for ‘secure removal’, and … Read More
Mac OS X includes an excellent command line network utility called “nettop” that allows users to monitor all network activity, traffic, and routes from a Mac to the outside world, both through local (LAN) and wide area (WAN) connections. If you’re unfamiliar with networking tools like this, you can think of nettop as a network … Read More
Large empty files are often used for testing purposes during disk access tests, development, QA, zeroing out data, and scripting. Though it’s certainly not applicable to most users, it’s easy enough to do that anyone can try it out even if you don’t have a specific need. We’ll cover three ways to quickly generate files … Read More
Need to quickly free up some processing power? You can do that easily by temporarily pausing and then later resuming any active process or application in Mac OS X. Technically, this is actually ‘stopping’ and ‘continuing’ a process, but a stop is not to be confused with the more aggressive killing or force quitting applications … Read More
The easiest way to unmount a drive in OS X is to either just drag a volume into the Trash, use the eject keys, disconnect the drive, or use one of the force eject methods. Along the same lines, if you want to remount a drive you can usually just physically unplug the drive and … Read More
Running out of disk space is never fun, and drive space comes at a premium for those of us with smaller SSD drives like the MacBook Air with a 64GB or 128GB drive. These tricks are fairly advanced and thus aimed at the pro segment of SSD users who are comfortable modifying system functions and … Read More
The easiest way to exclude many specific files or a group of matched files from a zip archive is by skipping the easy zipping utility built into Mac OS X’s friendly UI and turn over to the command line, where the powerful zip command resides.
If you’re a heavy command line user, you’re probably well aware that the arrow keys can be used to flip through previously executed commands and the tab key can complete them. But both of these functions can be significantly improved upon for searching through past command history by adding a few modifications to your .inputrc … Read More
Though it’s somewhat rare to encounter ownership and permissions errors in OS X, it can happen, particularly when an account has been moved, or a files owner has been modified by a third party application. Oftentimes you can just run through the process to repair user permissions, but that’s not always guaranteed to sort out … Read More