Latest Ubuntu related questions

Score: 0
Jane avatar
Upgrading to 18.04 from 16.04. Command line says /usr/lib/ubuntu-release-upgrader/check-new-release-gtk. How do I upgrade from here?
cn flag

From 18.04 Release Notes downloaded 18.04 iso then tried this in Terminal: Alt F2 update-manager -c

Got:

No command 'Alt' found, did you mean:
 Command 'slt' from package 'slt' (universe)
 Command 'lt' from package 'looptools' (universe)
 Command 'llt' from package 'storebackup' (universe)
Alt: command not found

So typed in this command in Terminal: /usr/lib/ubuntu-release-upgrader/check-new-rel ...

Score: 0
Segmentation fault (core dumped) when installing vmware-tools
ng flag

I want to install vmware tools but segmentation fault occurred. Then I checked the core file generated when installing it.

...
[New LWP 7235]
Core was generated by `/usr/lib/vmware-tools/sbin64/vmware-modconfig-console --install-status -- -l /u`.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0×00007f48caf6808c in ?? ()

I dont know what does it mean and how to deal with it. Thanks.

Score: 0
diva avatar
Wifi adapter not working also update & software doesn't be open on ubuntu 20.04
in flag

I have ubuntu 20.04 and suddenly the wifi become not detected( no wifi adapter found )

i have tried with installing firmware-b43 but it gives me this error:

sudo dpkg -i firmware-b43-installer_*

(Reading database ... 311808 files and directories currently installed.) Preparing to unpack firmware-b43-installer_019-4_all.deb ... Unpacking firmware-b43-installer (1:019-4) over (1:019-4) ... Setting  ...

Score: 1
Confusing lsb_release output, mismatched versions
cn flag
lsb_release -a

No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 21.04
Release:    20.04
Codename:   hirsute

As far as I remember I didn't tamper with any configuration files. I checked /etc/lsb-release and it is fine

cat /etc/lsb-release 

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=21.04
DISTRIB_CODENAME=hirsute
DISTRIB_DESCRIPTION="Ubuntu 21.04"

Where else can this 20.04 come  ...

Score: 0
bardana avatar
Why do I have two disks and can I delete one?
pk flag

One is a SSD disk is too small only 14 GB I can't install all the editors I need like Unity, gimp and many more. It does not help completely with the symbolic links, it still needs space to download certain apps and node.js and much more.

enter image description here

The other one TB Hard disk is really big and I would need that space in the SSD disk. I have links to store images and other things to that disk but it is not enough sp ...

Score: 0
Trouble dual booting Win 10 and Ubuntu 20.04.3 on two separate drives
jp flag

Set up Win 10 on 500 GB NVME drive. It worked fine. Then set up Ubuntu on a different HDD (1 1 TB HDD). Ubuntu install went well and it worked fine. However after going into the UEFI and switching the boot drive back to 500 GB NVME, Windows 10 no longer boots. I get a blank screen with flashing cursor.

If I reset UEFI Back to 1 TB HDD (Ubuntu drive) Ubuntu works fine again. I tried to look at Gru ...

Score: 0
Erik Brangs avatar
VLC outputs garbled video for certain files when video output is set to automatic but XCB output works: is this a bug or normal?
cn flag

I've got an old laptop with Ubuntu 20.04 where video output in VLC is broken for some files. This started happening some weeks ago.

I was able to fix it by changing the video output (in Tools -> Preferences -> Video) from automatic to XCB. Is this a bug that ought to be reported somewhere or is it expected that the automatic output selection might not work correctly?

Score: 0
Local DNS domain lookup is extremely slow
br flag

I have a DNS server I use to route traffic to local services. For example, it points router.home.lan to my router.

However, when I try to visit this address in my browser on my Ubuntu machine, it takes an extremely long time to load. If I visit the page on my Macbook or use the IP address on my Ubuntu machine then the page to load instantly.

I believe it has something to do with the DNS resolut ...

Score: 1
edward avatar
Path MTU and TCP nodelay
us flag

Should MTU be higher or lower when setting tcp_nodelay flag on a connection? I assume it should be higher since the packets gets bigger with the flag? correct me if i'm wrong. Current mtu is 1500

and is it safe to run on a live server with 5k concurrent users or would it require a reboot or ana pplication restart?

 ip link set dev eth0 mtu 5000
Score: 1
adb command not found after installed it
cn flag

I have install adb from terminal. But when I type "adb version" it's not found. Can anyone help me about this problem?

enter image description here

Score: 1
Tomas Gerulskis avatar
Simple bridge between two eth ports
id flag

I have PC1 (Ubuntu 20.04) with two ethernet controllers. I want them to work like simple switch. eth0 connected to router while eth1 connected to another PC2. I want PC2 has access to local network and internet as well. To do that I have to bridge the connections. I think this manual is quite good to follow, but its still unclear which eth should I enslave and which to remove? I don't want to do it wit ...

Score: 0
Trigosin Darom avatar
Can a non-root modify environment variables?
pk flag

Can a non-root (without sudo permissions) run the following command:

export PATH=/tml:$PATH

If so, how does it work?

I thought environment variables are read-only for non-root users, while shell variables can be modified freely.

Score: 0
marwan Ahmed avatar
Ubuntu installation errors
th flag

I am new to ubuntu, and i am trying to install it. but this errors appear during booting my pc:

 [ SQUASHFS: unable to read..., faild to start update UTMP and snaped] 
Score: 0
Ge Zhang avatar
Can ping a DNS server, but cannot resolve hostname
jp flag

My Ubuntu 20.04 computer cannot browse any website. This only happens when connected to eduroam WIFI.

ping 8.8.8.8 works, but host google.com 8.8.8.8 says

Connection timed out; no servers could be reached.

I am not an expert on computer networks, could anyone tell me what is the next step in troubleshooting?

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