Questions[ms-dos](ubuntu)

I have a SSD with Windows 10 and a disklabel type gpt and a HDD with Ubuntu 18 and a disklabel type DOS. I have read that having 2 disks with 2 different OS, and one disk is formatted to gpt and the other to dos can cause problems. I have a Acer Aspire machine, so I only have UEFI settings (there is no option to select legacy boot manager). The output of the command sudo fdisk -l|grep -A4 /dev/sd is:

Disk /dev/sda: 465,8 GiB, 500107862016 bytes, 976773168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
--
/dev/sda1  *         2048    976895    974848   476M ef EFI (FAT-12/16/32)
/dev/sda2          978942  13883391  12904450   6,2G  5 Extended
/dev/sda3        13883392 599820287 585936896 279,4G 83 Linux
/dev/sda4       599820288 976771071 376950784 179,8G 83 Linux
/dev/sda5          978944  13883391  12904448   6,2G 82 Linux swap / Solaris

Partition table entries are not in disk order.

Disk /dev/sdb: 119,2 GiB, 128035676160 bytes, 250069680 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
--
/dev/sdb1       2048    206847    204800   100M EFI System
/dev/sdb2     206848    239615     32768    16M Microsoft reserved
/dev/sdb3     239616 247971839 247732224 118,1G Microsoft basic data
/dev/sdb4  247971840 250068991   2097152     1G Windows recovery environment


Disk /dev/loop8: 163,7 MiB, 171618304 bytes, 335192 sectors
Units: sectors of 1 * 512 = 512 bytes

Should I be worried about it? Everything seems to be working just fine. I can boot in Windows and Ubuntu normally. Thank you in advance!

Background

In Linux you can:

• List a group of files with ls Filename*
• Remove a group of files with rm Filename*
• Move a group of files with mv Filename* /New/Directory
• But you cannot copy a group of files with: cp Filename* *.bak

Change Linux cp command to copy group of files

I have a group of files I'd like to copy without entering the names one by one and using the cp command:

$ ls gmail-meta3*
gmail-meta3                          gmail-meta3-REC-1558392194-26467821
gmail-meta3-LAB-1558392194-26467821  gmail-meta3-YAD-1558392194-26467821

How can I use something like the old DOS command copy gmail-meta3* *.bak?

I don't want to type similar command four times:

cp gmail-meta3-LAB-1558392194-26467821 gmail-meta3-LAB-1558392194-26467821.bak

I'm looking for a script/function/app that accepts parameters for old and new filename group and not something with hard-coded filenames. For example, a user can type:

copy gmail-meta3* *.bak

or they might type:

copy gmail-meta3* save-*

I'm using VirtualBox (Version 5.1.38_Ubuntu r122592) under lubuntu (Linux hostname 4.4.0-148-generic #174-Ubuntu SMP Tue May 7 12:20:14 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux) to start turbo debug under a DOS 6.22 VM.

When I start td.exe VirtualBox hangs and completely locks my desktop.

Here the screenshot:

System information:

NAME="Ubuntu"
VERSION="16.04.6 LTS (Xenial Xerus)"
ID=ubuntu
PRETTY_NAME="Ubuntu 16.04.6 LTS"
VERSION_ID="16.04"

Virtualbox installation information:

virtualbox:
  Installed: 5.1.38-dfsg-0ubuntu1.16.04.3
  Candidate: 5.1.38-dfsg-0ubuntu1.16.04.3
  Version table:
 *** 5.1.38-dfsg-0ubuntu1.16.04.3 500
        500 http://us.archive.ubuntu.com/ubuntu xenial-updates/multiverse amd64 Packages
        100 /var/lib/dpkg/status
     5.1.38-dfsg-0ubuntu1.16.04.2 500
        500 http://us.archive.ubuntu.com/ubuntu xenial-security/multiverse amd64 Packages
     5.0.18-dfsg-2build1 500
        500 http://us.archive.ubuntu.com/ubuntu xenial/multiverse amd64 Packages

Do you know how to solve this issue? What's the reason?

Thanks in advance.

I am trying to make Norton Commander 5.5 on an OLD 80286 DOS 6.22 box (Tulip LT286. I am actually still using this 30+ years old laptop almost daily to communicate with satellites in earth orbit via the COM port>TNC>transceiver.) that has no USB, ISA or PCI and only one COM port communicate with another Norton Commander 5.5 that is in a DOSBox 0.74 on an Ubuntu 18.04.2LTS machine. I cannot get a connection using the Link feature in NC.

To do that I use a serial nullmodem cable. I tested with a third machine that has DOSBox 0.74-2 on Windows 10 Pro and that works great (I set Windows COM1 to 38400.). So the DOS end of this setup is tested and works and it also confirms that Norton Commander works fine in a DOSBox, at least if its running on Windows 10 Pro. Also the nullmodem cable is tested in this windows<>DOS test setup so all that is working ok.

The only difference is the Ubuntu machine. I tested with a serial mouse and the correct com port is working and its ttyS0. I redirected the serial port to /dev/ttyS0 and the DOSBox terminal says" Serial1: Opening ttyS0" so that seems ok too. I am member of group dialout and everybody (777) has access to /dev/ttyS0. sudo stty -F /dev/ttyS0 returns "speed 38400 baud; line = 0;"

I am at a loss, does anyone have any tips to debug this?

Is there any way to run a program that uses a dos executable file on a desktop? I have one program that is a must for my work and I cannot find anything comparable in Ubuntu aps.