ssh – Can I install CentOS via target disk mode on a MacBook Pro 2010

I have an old 2010 Mackbook Pro, but the graphics card is dead, so the display is useless. Can I reuse this as a headless server by installing CentOS via target disk mode from my current MacBook Pro (via Thunderbolt cable)?

Once I have installed CentOS, how can I SSH in it without displaying on the host machine to get the credentials?

MacBook Pro 2017 does not have a boot disk when updating MacOS beyond Sierra

My 2017 15-inch MacBook Pro gives a blinking question mark every time I try to update to a newer operating system. The installation process seems completely normal until it is restarted for the last time and starts in a flashing folder. When I look in recovery, I see my SSD and the basic MacOS system, first aid on either one does nothing. From the startup disk in recovery, I don't see any available disk. The boot while holding the option shows the ssd as EFI boot, and the boot shows a slightly different installer which also fixes nothing.

I can restore the internet to Sierra if I want to, so I keep doing it and I tried to update to High Sierra, Mojave and Catalina, which all had the same problem. I reset ram and SMC, I did clean installs and reinstalls on each operating system with and without first aid on each visible drive beforehand, the only way to boot the laptop is doing internet recovery to Sierra, how well it works. The complete erasure of the hard drive and the clean installation attempts of each operating system also did not work via the Internet installation or the USB installation. I have tried some recommended terminal commands for this type of problem, but I can't remember exactly what they were (many were about mounting and reassembling drives). I am not at all comfortable or familiar with the terminal.

I don't care about data recovery or anything like that, I just want a new operating system because Sierra is no longer compatible with a game my friend plays a lot of. At this point, I'm a bit lost. I am a Windows person fixing this for a friend, so the fact that a clean install did not work is a bit inconsistent. Any help or advice is appreciated, thank you.

How to delete "untitled" partition from terminal or disk utility?

I've been trying for ages but I can't seem to figure out how to completely delete these two untitled volumes (?). I tried to delete, erase and the minus button in the Disk Utility and the commands in the terminal don't make sense or seem to work. Please find the attached images. I have Catalina OS

disk utility screenshot

disk utility list

My Windows 10 Asus laptop won't start or reset. Not enough disk space

My asus rog laptop won't boot, just goes to the blue screen with the many ways to fix it. I have tried everything, including hard reset and safe mode, and I still get the same error: not enough disk space. I'm stuck in there. Help?

partitioning – How to create volume for a disk on diskpart for windows 10 in order to be able to format the disk in fat32?

I made a partition on disk 2 after cleaning it up. I tried to create a volume for this disk, but none of my code attempts worked, for example, "create a simple volume size = 20,000 disk = 2 partition = 1". I also need to convert the drive to dynamic in order to format the volume as fat32. It says: "The command you selected is not available with this version of Windows."

No full disk encryption in the Samsung Galaxy A71

I just started using my brand new Samsung Galaxy A71 (Android 10 version) doing an initial setup, and it seems like it doesn't support disk encryption at all. On the contrary, on Samsung Galaxy A7, it was quite easy to activate it. Since it is impossible that in 2020 mobile devices without encryption will be sold, I made a google-fu, and, strangely, there is nothing to indicate that someone has already looked for this functionality. .

Where is this hidden function then?

No full disk encryption in Samsung A71

I just started using my brand new Samsung Galaxy A71 (Android 10 version) doing an initial setup, and it seems like it doesn't support disk encryption at all. On the contrary, on Samsung Galaxy A7, it was quite easy to activate it. Since it is impossible that in 2020 mobile devices without encryption will be sold, I made a google-fu, and, strangely, there is nothing to indicate that someone has already looked for this functionality. .

Where is this hidden function then?

macos – You tried to install Catalina in target disk mode …. built my mac?

Okay, maybe I bricked one of my MacBook Airs.

I am writing this message from the working MB. I have another one with a dead display. I connected them through Thunderbolt and mounted the broken one as a disk on the one that works using target disk mode. Then I used the disk utility to reformat the disk to APFS, Guid Partition. Then I tried to install Catalina but it says "You cannot install on this volume because it is a Mac in target disk mode" (see screenshot.)

Have I created an unrecoverable situation?

The only solution I can imagine is to remove the hard drive from Mac Bum, put it in the working Mac, install Catalina this way, and then put the drive back in. Both Macs are out of warranty so this is anything … but I wonder if there is a less complicated way out of this hairy situation?

oracle – set the block device of an ASM disk

Newer versions of ASMLib support oracleasm querydisk -p DATA01 which displays the underlying physical disk.

oracleasm-querydisk

Example:

# oracleasm querydisk -p SSDDATA1
Disk "SSDDATA1" is a valid ASM disk
/dev/sdl1: LABEL="SSDDATA1" TYPE="oracleasm"
/dev/sdar1: LABEL="SSDDATA1" TYPE="oracleasm"
/dev/sdbn1: LABEL="SSDDATA1" TYPE="oracleasm"
/dev/sddf1: LABEL="SSDDATA1" TYPE="oracleasm"
/dev/mapper/mpathqp1: LABEL="SSDDATA1" TYPE="oracleasm"
#

Older versions may not have -p and they only display the major and minor numbers that you can use to find the physical disk:

Map ASM disks to physical devices

Example:

(root@orcldb2 ~)# /etc/init.d/oracleasm querydisk VOL1
Disk "VOL1" is a valid ASM disk on device (8, 97)

(root@orcldb2 ~)# ls -l /dev | grep 8, | grep 97
brw-rw----   1 root disk     8,      81 Nov  4 13:02 sdg1

This example I copied from the blog post above doesn't seem entirely accurate (grep 97 returns minor number 81?), the concept works, however.

linux – Synchronization of Virt disk images between computers

I am trying to figure out how to synchronize the disk images created by Virt between two computers so that I can open this virtual machine on one or the other, and synchronize the modifications on the other when I will be finished. For reference, I use these virtual machines as development boxes and I would like to be able to switch between my laptop and my desktop for development.

The two hosts are Linux (specifically CentOS and Ubuntu). I plan to use Resilio to sync files to each other, but I'm having a problem with Virt locking files to the root property when virtual machines are running.

My current idea is to use rsync to synchronize files to / from the Resilio folder. Is this a good way to do it, or is there an easier way?