macos – Macbook Pro 16 Failed to boot after Big Sur update now I’m unable to mount the disk even in recovery mode

On reboot it showed the cannot boot from hard drive ? screen.

I rebooted into recovery mode but it fails to mount the drive. I can see the drive there with the correct details. It says the following:

Could not mount "disk0s2" ( enter error -119930868.)
I googled the error but get lots of posts relating to external drives etc. Nothing in any posts I’ve come across has helped.

When i run FistAid on the drive it get the following:

Repairing Storage System
Performing fsck_apfs -y -x /dev/disk02s2
warning: nx_block_count is 488475719, while device block count
error: object (oid 0x1): o_cksum (0xbd26e8008dccb575) is invalid for object
Checking the container superblock.
Storage system exit code is 8.
Storage system verify or repair failed. :(-69716)

Operation failed.

If i do "disk util apfs list" in terminal i get the following:
Container ERROR -69808
APFS Container reference: disk1
Size (Capacity Ceiling): ERROR -69620
Capacity in use by volumes: ERROR -69620
Capacity not allocated: ERROR -69620
+-< Physical Store disk0s2
  APFS Physical Store Disk: disk0s2
  Size: 1894999998464 B (1.9 TB)

I need some photos and files off the drive so if anyone can help it would be very much appreicated!

nvidia – Unable to install dual boot Ubuntu with Windows 10, both in UEFI mode (black screen after GRUB)

I have a Dell XPS 15 9550, with Nvidia graphics card. My Windows 10 runs in UEFI mode, and I want to dual boot it with Ubuntu. When I try to install Ubuntu 20.04.2 from USB prepared with Rufus, MBR(UEFI or Legacy) selected, it would always install in legacy mode (It would directly boot into Linux when I change the firmware settings to Legacy, and directly into Windows 10 when UEFI is selected). If I prepare the USB with Ubuntu using Rufus to boot in UEFI only (GPT, FAT32) it does not boot at all. Grub screen appears, and when I select Ubuntu I get a black screen (but the PC stays on, it does not keep rebooting or cycling). I have also tried different distributions (like Mint), but the same thing happens. I tried the same USB with a different PC and it boots normally with any distribution. I tried different ports on my PC, and a different USB but it still won’t work.

I have tried disabling secure boot, fast startup, hibernation, disabling legacy option roms, disabling attempt legacy boot. I tried increasing brightness after GRUB, changing GRUB boot options (adding nomodeset, changing to no splash, nouveau.modeset=0).

I have also tried to install Ubuntu in legacy mode, and then switch it to UEFI using boot repair, and I do see the “Separate /boot/efi partition” line (there is indeed and efi partition present in my PC), but the boot-repair tool requires disabling legacy mode in firmware settings first. I don’t know how to proceed after this since my PC boots directly into Windows 10 if I disable legacy, so I can’t access Linux or boot-repair anymore.

I have even tried disabling NVIDIA, since I also have the integrated graphics card, but it did not do a thing (maybe it only applied to my Windows session since I did it there).

I have been trying to set this up for the last couple of days and I have tried all of the suggestions that I found on other threads/forums. If anyone has any idea please help 🙂

I rooted my phone but my root is saying “binary reserved” as the app was uninstalled, causing me to be unable to reroot or unroot

I rooted my phone but my root is saying “binary reserved” as the app was uninstalled, causing me to be unable to reroot or unroot, I can’t do anything when it comes to rooting. My phone is rooted but the superuser was deleted by accident and i tried to reinstall it, it installed successfully but my phone is still not giving me the option to allow an app to run with su permissions. I tried flashing odin and odin is not working, twrp, and supersu. I’m scared to flash any other root methods because I rooted my phone and the only app that stopped working was Google Chrome. I don’t want to lose access to my apps, I was trying to back up but stupid ODIN won’t let me flash TWRP or CWM recovery to my phone. My phone is a Galaxy S4 (SGH-I337).

Unable to parse debug msg in ansible

I have got a debug msg in ansible in the below format:
“msg”: [
“Output: test output “,
“ABC: some text “,
“Master “,
“Location: test location “,
“URL: ”
Now I want to retrieve the URL value from the above output, which i will use in rest of the ansible script. How can i get this URL which is “”, in this exact format? Please help.

grub2 – Unable to boot into Windows after installing Ubuntu, how to fix?

GRUB menu does not appear

If the computer boots into Ubuntu automatically without showing the GRUB menu at all, sometimes you can press the manufacturer’s BIOS/UEFI key at boot time and while in UEFI or BIOS mode from the firmware menus select the operating system you need. Common keys used are Esc, Delete, F1, F2, F10, F11, or F12. On tablets, common buttons are Volume up or Volume down. During startup, there’s often a screen that mentions the key. If there’s not one, or if the screen goes by too fast to see it, check your manufacturer’s website.*

If this doesn’t work when the GRUB menu does not appear at boot time, immediately after the BIOS/UEFI splash screen during boot, with BIOS, quickly press and hold the Shift key, which will bring up a GNU GRUB menu screen. With UEFI press (perhaps several times) the Esc key to get to the GNU GRUB menu screen. Sometimes the manufacturer’s splash screen is a part of the Windows bootloader, so when you power up the machine it goes straight to the GNU GRUB menu screen, and then pressing Shift is unnecessary.

If this doesn’t work when the GRUB menu does not appear at boot time, then try the answers to:

Boot Repair

From Ubuntu open the terminal and type:

sudo add-apt-repository ppa:yannubuntu/boot-repair  
sudo apt update  
sudo apt install -y boot-repair
sudo boot-repair  

Open the Boot Repair application and select Advanced Options -> Other Options tab -> Repair Windows boot files. The boot flag should be placed on the same partition on which Ubuntu is installed. The partition on which Ubuntu is installed can be identified from the Disks application which is built-in in Ubuntu.

enter image description here

If you’re unable to select the Repair Windows boot files option because it’s grayed out, refer to this answer.


Rescatux is a free bootable live CD/USB that can repair GRUB and the Windows bootloader. Rescatux has a graphical interface with a menu of operating system rescue tasks. If your hard disk has the MBR partitioning format, you can select the Restore Windows MBR (BETA) option to repair the Windows bootloader. If your computer has UEFI firmware, you can select among the UEFI boot options.

Boot options:

  • (>=0.41 beta 1) Update UEFI order
  • (>=0.41 beta 1) Create a new UEFI Boot entry
  • (>=0.41 beta 1) UEFI Partition Status
  • (>=0.41 beta 1) Fake Microsoft Windows UEFI
  • (>=0.41 beta 1) Hide Microsoft Windows UEFI
  • (>=0.41 beta 1) Reinstall Microsoft Windows EFI
  • (>=0.41 beta 1) Check UEFI Boot

GRUB options:

  • (>=0.40 beta 11) Easy GNU/Linux Boot Fix
  • Restore GRUB and GRUB2
  • (>=0.31 beta 4) Update any GRUB2 menu
  • Update Debian/Ubuntu GRUB menus

Windows options:

  • Restore Windows MBR (BETA)
  • Clear Windows passwords
  • (>=0.31 beta 4) Promote a Windows user to Administrator role
  • (>=0.41 beta 1) Reinstall Microsoft Windows EFI
  • (>=0.31 beta 4) Unlock Windows user

Password options:

  • Change GNU/Linux Password
  • Regenerate sudoers file
  • Clear Windows passwords

Expert tools:

  • Boot-Repair
  • GParted
  • OS-Uninstaller
  • Clean-Ubiquity
  • PhotoRec
  • TestDisk

enter image description here
Rescapp is a nice wizard that will guide you through your rescue tasks.

How to make a Rescatux live USB from Ubuntu

  1. Insert a USB flash drive and check if the boot flag has been enabled on the flash drive using the GParted application. Unmount the USB flash drive. Open GParted and select the USB flash drive from the menu list of drives. From the GParted menu select: Partition -> Manage Flags -> check boot.

  2. It is very important to verify that the device that you are installing the Rescatux live USB to is indeed your flash drive, so that you don’t overwrite any of your system or personal files which may make your operating system unbootable. In Ubuntu you can find the device name of the flash drive using the Disks application.

  3. Unmount the USB partition device. Let’s say the USB partition device is /dev/sdc1

     sudo umount /dev/sdc1 # replace sdc1 with the partition name of your USB drive
  4. Change directories using cd to the path of the directory where the Rescatux iso file that you downloaded is located.

  5. Write the Rescatux iso file to the USB flash drive. In the following command replace rescatux_0.xxxx.iso with the name of the Rescatux iso file you downloaded.

     sudo dd if=rescatux_0.xxxx.iso of=/dev/sdc # this command also works in Windows Subsystem for Linux 2 
     sudo sync  

I have also been able to make a Rescatux live USB using the built-in Startup Disk Creator app.

Windows 10 factory reset repair of Windows bootloader


Open Settings

Click the Start Menu and select the gear icon in the lower left to open up the Settings window. You can also select the Settings app from the app list. Under Settings, click Update & Security to continue.

Choose Recovery Options

Click the Recovery tab and select Get started under Reset this PC.

Save or Remove Files

At this point, you have two options. You can either choose to keep your personal files and only remove downloaded apps and settings, or you can wipe everything and start from scratch. Each choice will also give you an additional setting to change.

If you choose Keep my files, apps and settings will default to what they were when the PC was brand new. This setting can be turned off by clicking the Change settings link and switching it off. If you choose Remove everything, there’s also a way to remove your personal files while saving apps and settings. Click the Change settings link and toggle the Data erasure option to on.

Reset Your Computer

Once you decide what should be removed from the computer, hit Next and Windows will tell you what will be deleted before you make a final decision. If you selected Keep my files, you can look at a list of apps that will be removed with the reset.

Finally, click Reset to actually commit. Your computer will restart, and after several minutes, it will boot back up again. When you return to Windows 10, you’ll see that whatever you selected to be removed has been wiped from the machine. If you backed up your files, they can now be restored to the machine.

gmail – gsuite user unable to access google groups

I’m an Owner of Google Groups instance with two different email accounts – my personal one ( and my work one (

I can verify that my email is an Owner on this page:

BUT when I try to access the Google Groups instance with my email I get this error:

Content unavailable

Try switching accounts, or check with your organization’s administrator to make sure you have permission’s email is done through GSuite. I’m an GSuite admin (but not a super admin) for

Maybe there’s a setting in that GSuite that isn’t letting me be a member of a Groups external to the domain of If so where would I find that setting?

Like I can add new accounts and remove new accounts and I can change (some) people’s OU’s but I don’t see an “Admin roles and privileges” button when I pull up a user account in GSuite. Maybe that’s where I’d normally be able to do this? I can add and remove Apps if that helps idk

sharepoint online – Wget command shows an error : unable to resolve host address ‘https’

i’m trying to download a file from the sharepoint portal by using “Wget” command in unix.
using microsoft office365 sharepoint portal to download a file , url is working fine with the microsoft edge browser where as the same url when using in the unix “wget” command shows an error : unable to resolve host address ‘https’

wget –proxy ‘https:’ -O myfile.xlsx
i have tried to change the url but not working , also very new in using this command
any help how to solve this issue

Unable to create and connect to Town docker registry

I’m trying to host a private docker registry.

i’ve follow: to create my own registry?

But when running:


It exit without error, but without result either.

Do you know what I do wrong ?

unable to Attach documents in Google forms

i have created a Google form and have mandated attachment of a document but it is not being allowed

Unable to connect excel to sql server. Getting an error:

sql server microsoft sql: a connection was successfully established with the server, but then an error occurred during the login process. (provider: ssl provider, error: 0 – the certificate chain was issued by an authority that is not trusted.)

I’m using sql server development edition, and this suddenly stopped working. I think it’s certificate based but can’t figure out how to specifically fix this problem, despite reading a number of articles.