Latest Ubuntu related questions

Score: 2
Shell Pipelines
ng flag

I'm trying to understand this Shell line:

grep ^x06 ssh_known_hosts |
ssh-keygen -l -f -| 
\sed -e 's/^.*\(SHA256:\S\+\).*(\([^)]\+\))/\2: \1/' >fp
  • So with grep we are basically searching for the data ssh_unknown_hosts. What is ^x06 used for?
  • With the ssh-keygen command we are generating a SSH key with -l. What's the -f used for?
  • The last line I didn't get.
Score: 0
Introducing latency in the video output
eh flag

I am using the CARLA driving simulator (https://carla.org/) in Ubuntu. I want the output of the CARLA, i.e, the video, to be displayed with a certain latency. I am not sure how to do it.

Any suggestion would be highly appreciated.

Thanks in advance

Score: 8
Someone avatar
Can there be any issue if I edit sources.list and jump between Ubuntu releases?
my flag

I found that sources.list in /etc/apt is the key file for all the repositories.

I also found that every system and ubuntu release has its own sources.list, So here is where I was a little bit in an experimental mood!

I was on Ubuntu 18.04 LTS(64 bit), While just browsing and seeing different sources.list files. In which I found something interesting. So, as of now, there are a lot of new ubuntu versions  ...

Score: 1
hYEOnOO  null avatar
For reasons of unknown cause, a huge size of syslog continues to be created
cn flag

I am struggling with huge syslog files that occur frequently. In only 24 hours, 740G files were created, and a lots of addresses were recorded.

Even similar domains and ip addresses appear repeatedly.

syslog, syslog.1, syslog.2.gz, syslog.3.gz, syslog.4.gz, syslog.5.gz, syslog.6.gz, syslog.7.gz Eight files have been created, all of which are 1.5T in size.

These huge files have filled the root mount, an ...

Score: 0
TakeMeToTheMoon avatar
Jack sound distortion/clipping
es flag

I have installed Ubuntu 20.04 and everything works fine, except that when I start Jack, the sound produced by applications like Reaper or SuperCollider get distorted or hyper-amplified (basically, it's clipping). For example, using Reaper, I have to put the master fader at -70db to have a "normal", non-distorted output at a "normal" amplitude, even though the original track is just fine.

Is there ...

Score: 3
Can't run shell script by double click in Files (Ubuntu 21.10)
in flag

Previously in Nautilus, the problem was solved like this: How do I run executable scripts in Nautilus?

Now there is no such section and org.gnome.nautilus.executable-text-activation also does'nt work.

Score: 0
How to give wine root?
au flag

A fairly new Ubuntu user here. I want to install and use apps and games for Windows on my machine.

I have done so far:

  • Installed Ubuntu on my SSD
  • Mounted my 1 TB HDD to /usr/local
  • Tried to run PlayonLinux and Bottles

The problem is that I want to install things on HDD and no app whatsoever has permissions for that. With Steam it was fairly simple and with some fiddling I could give myself root access  ...

Score: 1
Ali najjar avatar
Firewall setting are correct but port still closed form outside
cn flag

I setting up machien for connect to postgresql remotly I check somthing and it's apeare all things is correct

Checking the port status :

$> sudo netstat -tulpn | grep LISTEN | grep 5432

tcp 0 0 0.0.0.0:5432 0.0.0.0:* LISTEN 18134/postgres

Checking the firewall

$> sudo ufw status | grep 5432

5432 ALLOW Anywhere

Ping inside machine work :

$> telnet 185.235.x.x 5432

Connected to 185.235.x ...
Score: -2
Packages and meaning of gcc-8
us flag

ls -la commands below brings file information gcc-8 that looks strange for me. I suppose it is not link. I know there are different GCC packages with different GCC versions and it looks like I have package with GCC version 8.

How to know gcc-8 is package and not link? Where this package is located? Why other binaries does not show its packages?

ls -la /usr/bin/gcc

brings

lrwxrwxrwx 1 root root 5  ...
Score: 0
ElliotDaly109 avatar
RoundCube page is not shown, wordpress blocks the link
pg flag

I have installed Wordpress on an Ubuntu server, it runs as it should on my own domain.

Now I have also installed, Postfix, dovecot, and roundcube. I followed this installation guide: here, but as I go to mail.domain.com/mail, I see the "Nothing here"-page from WordPress.

What am I missing?

Score: 0
Soroushazizi avatar
black screen after updating nvidia graphics
gl flag

I have just installed Ubuntu 20.04 and I'm trying to run Dota2 on it, but everytime I run the game it's like my screen is broken!!! I've tried to update my Nvidia graphics but everytime I do that, I get the black screen after installation.

enter image description here

Score: 0
skekmal avatar
What does the command `~man cd` mean?
mx flag

I accidentally ran the command ~man cd in the terminal and it returned bash: /var/cache/man: Is a directory leaving me scratching my head. What is the meaning of the output here? cd is a shell-builtin and man is 'man-page', but what is the meaning of ~man here and how could it run in combination with cd?

Score: 1
How do I install USB Blaster driver on Lubuntu?
cn flag

I'm using a virtual box with Lubuntu 20.04 and I need to install the USB Blaster drivers does anyone know how to do it?

Score: 1
GreenTriangle avatar
Cannot delete file, because it doesn't exist -- even if I say "rm *" -- and chmod works
cn flag

I have a file, cover.jpg, which I want to delete.

If I run rm cover.jpg, I get the error "rm: cannot remove 'cover.jpg': No such file or directory."

If I run rm *.jpg, I get the same error.

If I type rm c and tab-complete, I get the same error.

If I run ls -1b, the file's name appears as cover.jpg, entirely normally.

If I run chmod 555 cover.jpg, it works fine.

find -name cover.jpg finds the file, but

Score: 0
Network issue ubuntu 20.04 - some website can't be reached
sy flag

Since today, I cannot access some website through the browser or by pinging it in the terminal while others remain accessible. I am on ubuntu 20.04 and i haven't done any network settings change or what so ever. For instance www.google.com or www.youtube.com are accessible but www.github.com or www.askubuntu.com aren't.

ping youtube VS github

As you can see , YouTube.com is pinging correctly but GitHu ...

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