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1500 questions
143
votes
8 answers
"Package 'docker-ce' has no installation candidate" in 18.04
I'm following the official Docker installation guide for docker-ce on Ubuntu.
When I get to sudo apt install docker-ce I get E: Package 'docker-ce' has no installation candidate:
$ sudo apt-get update
Hit:1 http://gb.archive.ubuntu.com/ubuntu bionic…
Robin Winslow
- 2,646
- 3
- 21
- 26
142
votes
1 answer
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY
When I run apt-get update, I get this error message:
Err:18 http://dl.google.com/linux/chrome/deb stable Release.gpg
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY…
Billal BEGUERADJ
- 6,361
142
votes
8 answers
How do I change my default browser?
Is there an option to change my default browser for all my applications?
Ederico
- 6,437
142
votes
6 answers
apt full-upgrade versus apt-get dist-upgrade
In accordance with man pages:
apt has parameter full-upgrade
apt-get has parameter dist-upgrade.
Are both the same command?
btw: which is officially the recommended command in Ubuntu 16.04? apt or apt-get?
a903user
- 1,453
142
votes
13 answers
Bluetooth headset with poor sound quality on Ubuntu
I've bought a Philips SHB4000 headset (phone+mic) wireless (bluetooth) and It has a good quality when I pair it with my phone or PC Windows but when I pair it with the same PC on Ubuntu (14.10 64 bits) the sound quality goes down.
I've been googling…
Cleber Marques
- 4,249
142
votes
8 answers
scp copy over ssh doesn't work - permission denied error, please?
It's driving me nuts! I just want to transfer one simple file from laptop to server.
I'm using ubuntu on both machines.
So I have:
-rwxr-xr-x 1 sandro 414622 2011-10-14 23:42 sandrophoto-html.tar.gz
And I'm sending it using:
sudo scp -P XXXX…
user25389
142
votes
2 answers
What is the correct way to edit a crontab file?
I am trying to automate the refreshing of awstats for my webserver and understand that I need to use cron to set that up. So each user has a crontab file?
I was following the instructions here community/AWStats
And it says to go to the file at:…
timbram
- 2,255
- 5
- 20
- 21
142
votes
5 answers
What is the CVE-2014-6271 bash vulnerability (Shellshock) and how do I fix it?
Recently, there have been news going around regarding "CVE-2014-6271" (See USN-2362-1), which is a vulnerability in Bash. How do I know if I am affected by this, how can I fix it, and why should I care?
This is designed as a canonical answer for…
nanofarad
- 20,906
142
votes
1 answer
Shutdown after a certain time
I am done using my laptop but I am using the hotspot in my smart phone. So I want my laptop to be awake for next one hour. How can I Shutdown the laptop after one hour of time?
sigdelsanjog
- 7,280
142
votes
3 answers
What does the StartupWMClass field of a .desktop file represent?
I am working on this pre-existent .desktop file and I have a doubt:
The file content is:
[Desktop…
AndreaNobili
- 4,839
142
votes
2 answers
GPG error: The following signatures couldn't be verified because the public key is not available
Possible Duplicate:
How do I fix the GPG error “NO_PUBKEY”?
after sudo apt-get update I get this error:
W: GPG error: http://archive.hivemind.me all Release: The following signatures couldn't be verified because the public key is not available:…
PabloJimeno
- 1,525
142
votes
4 answers
No Host only adapter selected
I have a problem with my virtualbox on ubuntu 12.04, I can't add a host only adapter, the message is "no host only network adapter selected" I can't select anything
can anyone solve this problem??
Ujang Karnadi
- 1,523
- 3
- 11
- 10
142
votes
4 answers
How to repair a corrupted FAT32 file system
I'm using the FAT32 file system for my pen drive. It frequently has file/data corruptions.
In Windows, I used the scan disk utility to fix the FAT32/NTFS file systems. How can I do this in Ubuntu?
Chalitha
- 1,423
142
votes
6 answers
Changing colors for user, host, directory information in terminal command prompt
Is it possible to change the colors in the command prompt for the user@computer, as well as the the current directory and command parts of the prompt display?
I've already seen something like this done by OSX users, but I don't know how to do the…
Luiz Rodrigo
- 1,769
142
votes
17 answers
How can I capture network traffic of a single process?
I would like to examine the network traffic being handled by a single process, but simple network captures won't work since I am dealing with such a busy system (lots of other traffic happening at the same time). Is there a way to isolate a tcpdump…
Kees Cook
- 17,823