Latest Ubuntu related questions

Score: 0
Unable to correct problems, you have held broken packages. when installing c++
jp flag

So I'm trying to install c++ and I keep getting this error

sudo apt install g++
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Inco ...
Score: 0
Disable ipv4 for a specific process
kp flag

Is it possible to disable IPv4 on a per-process basis?

I would like that a specific process only uses IPv6 for resolving DNS and then for making TCP connections, but without disabling IPv4 for the whole machine or for any of the network interfaces.

Score: 0
Ubuntu 20.04 alsamixer protocol error for Scarlet 6i6, and no sound
ca flag

I get a protocol error message when I try to open my Scarlett 6i6 preamp, connected via USB, on Ubuntu 20.04. Works just fine on Ubuntu 18.04, on another computer.

cannot load mixer controls: Protocol error

enter image description here

At the same time, pavucontrol shows the device, and it is playing something, but nothing is audible:

enter image description here

Is there a way to fix sound, or debug what's going on?

Score: 0
kurokirasama avatar
upgrade 20.04 to 21.04. Direct upgrade or from scratch?
us flag

I have ubuntu 20.04 and I'm considering upgrading... I remember a few years ago that I tried on another machine, and it just didn't work, I had to reinstall from 0. Then on my next machine I had to use windows and just last year I came back to ubuntu.

Now, it's been a few years since then... it's still an issue or it it safe to upgrade directly?

Thanks

Score: 0
How to update OpenSSL FIPS-validated packages?
us flag

I am running FIPS for Ubuntu 18.04 which uses certified cryptographic modules. One of the modules, openssl1.1.1-1ubuntu2.fips.2.1~18.04.3.1 has vulnerabilities (CVE-2021-3711, CVE-2021-3712) that are fixed in an updated version, openssl1.1.1-1ubuntu2.1~18.04.13.

This newer package is not available to install when I run apt upgrade. I haven't been able to find any documentation or guidance at ubuntu ...

Score: 1
How to install everything without getting an error?
ke flag

Everytime I install an app I will get an error. Why? Because of the "deepin-anything-server". Here come what I get when trying to autoremove.

nguyen@X553MA:~$ LANG=C sudo apt autoremove
[sudo] password for nguyen: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages will be REMOVED:
  deepin-anything-server
0 upgraded, 0 newly insta ...
Score: 0
Ubuntu 18.04 display UNCLAIMED
eg flag

My lenovo laptop E590 has been working fine since December 2018, with Ubuntu 18.04.

But suddenly, since yesterday I am facing an issue. If I switch on the laptop it gets stuck at "starting Gnome Display Manager". Then, I switch off and on restart enter the recovery mode. I enable networking and the do a normal resume; I am able to do login in normal graphical mode ( gdm3). I have already done thi ...

Score: 0
YYK avatar
Why is openjdk-8 not installed well?
cn flag
YYK

I installed openjdk-8-jdk, but at /usr/lib/jvm/java-8-openjdk-amd64, there is only bin, include, lib, man.

Also, /usr/lib/jvm/java-8-openjdk-amd64/bin has just 2 files (appletviewer, jconsole).

So I've removed it and then re-installed it, but it doesn't work.

How do I get Java to install correctly?

Score: 0
DamManc avatar
libffi and libp11-kit - no version information available
sa flag

Every time I update the package sources list with:

sudo apt update

I get many lines of code like this:

/usr/lib/apt/methods/https: /usr/local/lib/x86_64-linux-gnu/libffi.so.7: no version information available (required by /lib/x86_64-linux-gnu/libp11-kit.so.0)

How can I solve this problem about dynamic libraries?

Score: 0
jcnw avatar
Xsane not detecting Lexmark scanner since I moved my computer and set it up again
us flag

I'm using Hirsute Hippo and Lexmark supplies a driver which supports a USB scanner using Xsane. All was well until I moved and reset up the computer. Now Xsane 0.999 cannot detect the scanner. Changed my USB port. Re-downloaded the driver and used Ubuntu software to install it Tried to download Libsane extras but cannot locate the package. GIMP XSane plugin was another suggested solution but cannot find ...

Score: 18
How do I contribute a wallpaper to new Ubuntu releases?
vn flag

I am willing to contribute to the new Ubuntu update. I have a lot of good quality images that were taken by me, and I'm willing to contribute them as wallpapers for the next Ubuntu release. But the thing is I don't know how I can do that. Any guidance may be very helpful.

Score: 0
Firstbass avatar
LVM volumes not mounting after upgrading 16.04 to 18.04
jp flag

Belatedly upgrading Ubuntu from 16.04 to 18.04. /home, /var/log and /tmp are part of an LVM volume group. But these aren't getting mounted and the boot is dropping out to single user. All the LVM components (volume group, physical volumes, logical volumes) appear to be active but there are no devices created in /dev. I noticed during the boot that the devices time out after 1 minute 30.

It's diff ...

Score: 1
Wi-Fi Very unstable (Ubuntu 20.04 LTS, Realtek USB Adapter)
fr flag

I'm using Ubuntu 20.04 LTS with XFCE and the wifi works fine but some times it keeps disconnecting. (Windows WiFi works fine). I tried changing the DNS, some IPV6 settings and some other stuff but nothing worked. Is there any setting or something on the wifi? Thanks.

lsusb output:

Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root  ...
Score: 2
Space Impact avatar
How to remove directories that have numbers as file names in Ubuntu using command line?
in flag

I have a directory where there are subdirectories which have numbers as directories. For example I have a parent directory test now I have some subdirectories like 1,2,3,4,5,6,7. Now I have a local exported variable like export a=3. I want to delete directories that are above or equal to $a and below or equal to $a+3, So I want to delete files 4,5. How can I achieve this in Ubuntu 18.04.6 LTS.

I tried

Score: 0
Maske avatar
A TLS fatal alert has been received with apt
us flag

When I run sudo apt update this return "A TLS fatal alert has been received" to the repositories on https.

Err:6 https://download.docker.com/linux/ubuntu focal Release                                                       
  Could not handshake: A TLS fatal alert has been received. [IP: 10.0.3.10 80]

It seem to be a problem with gnutls tools, throug the proxy.

When I run gnutls-cli directly to this ...

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