It mounts volumes on internal disks manually. Only unmounted volumes can be mounted, obviously. To mount all volumes on a disk, use diskutil mountDisk disk1 , for example. Verification involves checking the contents of the disk against the expected values. If any mismatches are found, the disk will be identified as in need of repair. This will run a repair pass on the volume and attempt to fix any problems found in the verification process.
The eraseDisk verb handles reformatting disks, which erases all data and volumes on a single disk. The verb takes as inputs the format, new disk name and disk identifier, in that order.
The new disk will have one volume named. The reformat verb will erase a single volume on the disk while keeping the same name and format. The partitionDisk verb runs an command-line version of Disk Utility, allowing you to create multiple partitions on a single disk. Partition sizes can be specified in gigabytes with the G suffix 2 G or terabytes with the T suffix 2 T.
Volume1 and Volume2 will each take up 25 percent of the disk, and Volume3 will occupy the remainder. You can see the results of the operation at the end of the Terminal window to determine everything went okay. Your email address will not be published. Notify me of follow-up comments by email.
Since your laptop isn't always connected to its backup disk, Time Machine retains "local snapshots," or files that it will copy to your backup disk the next time it is available.
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However, these local snapshots take up space, and you may want to turn this feature off if you don't have much room on your hard disk. You can do so with the following command:.
Running this command will also delete any local snapshots. You can turn local snapshots back on by running:. If you love delving into the nitty-gritty, and especially if you manage remote Macs, you'll find this to be a very useful tool. You can exclude certain files and folders from your Time Machine backups from the Time Machine pane in System Preferences. Naturally, you can also do this from the command line, too. Run this command:. The part stands for the path to a file or folder. For example, if I want to exclude my Downloads folder from Time Machine backups, I would run the following:.
How to Eject devices from the use of the terminal for a Mac « Operating Systems :: WonderHowTo
The tmutil addexclusion command has an interesting property: When you use this command, the item you exclude remains in the Time Machine exclusion list even if you move it, which is not the case when you exclude items from the Time Machine preference pane. If you use the above command with the -p flag, then it will not be sticky, and will be the same as an exclusion you add from the Time Machine preference pane.
If you're managing a remote Mac, such as a server, you may want to change Time Machine settings for that computer. You can start by finding where Time Machine backups are stored. To change the destination, you can use two commands. First, remove the current destination like this:.
In place of , type in the text string returned by the destinationinfo command. Then run this command to set up a new destination disk:. You can add multiple destinations as well, since Time Machine can rotate its backups on several disks or volumes.
Getting Acquainted with diskutil
See man tmutil for more on setting up multiple backup destinations. You can now do this without the command line too, see "How to create redundant Time Machine backups. Time Machine saves a lot of backups: You can get a list of all the backups on your Time Machine disk with this command:. If you're curious about how much has changed in your Time Machine backups, there's a command that will let you find out how much of each backup is new.
Run this command to see the delta between each of the Time Machine backups on your backup disk or volume:.
How to mount and unmount drives in macOS and OS X from the command line
This is not the Backups. Note that this command takes a long time to run, as your Mac has to calculate a lot of information. The tmutil command offers many other options, such as the ability to inherit destinations, perform detailed comparisons of backups, restore items and much more. See man tmutil to find out all that you can do. Article via MacWorld.
But on all apples I removed corestorage because it becaue unreliable on the long run. This one might contain the old command: Commands to repair permissions are hidden but still exist. Skip to content. Sign up for a GitHub account Sign in. Instantly share code, notes, and snippets. Embed What would you like to do? Embed Embed this gist in your website. Share Copy sharable link for this gist. Learn more about clone URLs.
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Download ZIP. Code Revisions 9 Stars Forks Verify and Repair: To repair the drive , you can issue the following command into Terminal: Once booted from OS X recovery, select Terminal from the utilities and then at the unix prompt enter: This should unmount all volumes of the physical drive. If still the above method didn't work, then the last option is to force the entire disk to unmount. For that using the terminal application again, enter the following command: This will definetely unmount the entire disk and all its related volume.
You can then install all available software updates with the following command: You can also install only the recommended updates with: Control Time Machine from the command line Time Machine is a great tool for ensuring that your data is safe, and it's pretty easy to set up and use.