Is Memory Error While Saving Ubuntu’s Status related to Inability of Installing Guest Additions?

After trying to save the Ubuntu 16.04 status before closing the operating system (which is installed on a VirtualBox machine on a host windows), here is the error message I receive resulting in the closing of ubuntu and not saving its status. I would appreciate if someone can explain this and give a solution for it.

The instruction at ************************** referenced memory at *******************************. The memory could not be read. Click OK to terminate the program. 

Where stars stand for some weird combination of letters and numbers.

NOTE: I have allocated 2048 MB as Base Memory with 2 CPU processor. And I have problem installing Guest Additions (if that is related to the issue!)

Memory Error While Saving Ubuntu’s Status before Closing

After trying to save the Ubuntu status before closing the operating system (which is installed on a VirtualBox machine on a host windows), here is the error message I receive resulting in the closing of ubuntu and not saving its status. I would appreciate if someone can explain this and give a solution for it.

The instruction at ************************** referenced memory at *******************************. The memory could not be read. Click OK to terminate the program.

Where stars stand for some weird combination of letters and numbers.

How to expand my Ubuntu’s space with unallocated space

I’ve created a partition of 50GB to my Ubuntu on my SSD (using Win10 with 200GB), I want to expand my Ubuntu’s space by say, 20GB. So I’ve de-allocated that space from my /sda2 (ntfs) partition.

Now I would like to merge the unallocated space with /dev/sda5 which is an extended partition.

I’ve tried using AOEI software on win10 but it said it doesn’t take care of extended paritions. Tried to unmount sda5 (with –force or -f too, and with -l too), and it just made my system laggy, couldn’t do anything and had to restart, and eventually the key stayed.

I guess the steps should be to unlock the extended parition and then move the unallocated space down, and then I would be able to extend my Ubuntu’s space, but I’m not able to do it.

I’ve also read many posts and watched some YouTube videos which didn’t help me before asking here. Any help is highly appreciated, I need that space 🙁enter image description here

Ubuntu’s problem – 18.04

Since several days I have a problem, each time I want to use the computer. A pop-up window shows, saying Ubuntu have a problem and has to shut-down. When I see the reason of the problem, it’s due to enter image description here

I don’t know how to solve this problem. How can I eliminate baloo_file_extractor? Besides I have Ubuntu 18.04 and baloo belongs to KDE. Please, I need your urgent help because the computer freezes very often and I think is because of this archive. Thanks.

no ethernet on two ubuntus

After working fine for years, suddenly, there’s no ethernet on my desktop Ubuntu 18.04. It connects for a few seconds, then disconnects for a minute or two. The LED at the plug flashes when it’s connected.

With dmesg | grep -e r8169 I get a series of

r8169 … link down r8169 … link up r8169 … link down 

&c &c &c

and the “cable unplugged” message at Settings > Network.

For very brief moments, I can get a website on my browser ‒no more than two or three seconds. If I’m very quick, I can even get some Google results. Then “cable unplugged” again.

I then tested Ubuntu 16 on a flash drive. This means, of course, that my hardware ran a completely other OS.

The behaviour was the same. Tentative diagnostic: hardware malfunction.

But which hardware: the desktop, or the router/modem? Though my WiFi is working fine on a laptop running Windows, I phoned the (optic fibre) internet provider just to make sure, and they remotely tested the router/modem. They said there was “some instability” and would be sending a technician here to look at the modem when the cows go home.

So, for the moment, I have this question: could this problem originate from the network card on the motherboard? from the r8169? from the interplay between the r8169 and the modem?

How to change Ubuntu’s terminal name

enter image description here

I’ve been reading about this topis here and tried the solution given to change the terminal name (refer to the picture on item number 1)

But none of them can change the terminal’s name (item number 1).

user@linux:~$   gnome-terminal --title="SOME TITLE HERE" user@linux:~$     user@linux:~$   PROMPT_COMMAND='echo -ne "3]0;SOME TITLE HERE7"' user@linux:~$     user@linux:~$   echo -ne "3]0;SOME TITLE HERE7" user@linux:~$    

I know that item number 2 can be changed with PS1. But the title (item number 1) still didn’t change even after I change the PS1

user@linux:~$ is fine. I don’t want to change this, I just want to rename the terminal’s title on the top (item number 1)

How to change Ubuntu’s terminal name

enter image description here

I’ve been reading about this topis here and tried the solution given to change the terminal name (refer to the picture on item number 1)

But none of them can change the terminal’s name (item number 1).

user@linux:~$   gnome-terminal --title="SOME TITLE HERE" user@linux:~$     user@linux:~$   PROMPT_COMMAND='echo -ne "3]0;SOME TITLE HERE7"' user@linux:~$     user@linux:~$   echo -ne "3]0;SOME TITLE HERE7" user@linux:~$    

I know that item number 2 can be changed with PS1. But the title (item number 1) still didn’t change even after I change the PS1

user@linux:~$ is fine. I don’t want to change this, I just want to rename the terminal’s title on the top (item number 1)

About Ubuntu’s root permissions

Well knowingly, I messed with the permissions of ‘/’. I gave all the permissions to ‘/’ and that too using -R. This is now causing various problems like RSA keys were not working, sudo was not working. Moreover, now every command demands run as root or suid. Can I do something so that I could restore default permissions to Ubuntu? Thanks, in advance.