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There are several ways. The recommanded way is Repair Your Disk in macOS Recovery, Restart or turn on your Mac, then immediately press and hold Cmd + R . Release the keys when your Mac displays anything on the screen. Once you’re in macOS Recovery, launch Disk Utility and proceed to run First Aid . ...

Some interesting information to boot a Mac. On an Intel-based Mac To use any of these key combinations, press and hold the keys immediately after pressing the power button to turn on your Mac, or after your Mac begins to restart. Keep holding until the described behavior occurs. Command (⌘)-R : Star...

You can also try to load it manually:

In Utilities > Terminal
Type: diskutil list to find your drive (mine is disk2s1)
Unmount the drive: diskutil unmount /dev/disk2s1
Mount the drive: diskutil mount /dev/disk2s1

I had this problem once.
I solved it by connecting (and properly dismount) on another computer.
And then connect it again to the macbook.

I had the same problem on Gentoo server.
turns out it was a update that went wrong.

recompiling shadow and util-linux solved the problem: su flag is missing in sys-apps/shadow and is included in sys-apps/util-linux

Because a hidden wifi network doesn't broadcast its name,
You have to tell the raspberry pi to scan for it.


add in /etc/wpa_supplicant/wpa_supplicant.conf

or in /etc/network/interfaces/wlan0

You can do it with ipconfig open the Run dialog box: ( windows key + R) enter : ipconfig /flushdns but it might be clearer using comand prompt (run as administrator): and run ipconfig /flushdns If you want to use power shell: Type "powershell" in the search bar beside the Windows logo. sel...

You can use the opsenssl command:
Or give it on some sites :
https://www.sslshopper.com/csr-decoder.html

for debian you neet to be "real"-root.

So the correct su command: I had the same problem when I installed a debian server.

standard the numbers are MB, you can lookup the size and the free space with print.

If you want to create an new partition on an empty disk,
the easiest way is using percentage: