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1500 questions
100
votes
3 answers
What are some good GUI diff and merge applications available for Ubuntu?
What are some alternatives to WinMerge and the pros and cons of each?
Judge Maygarden
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100
votes
4 answers
What's the difference between 'killall' and 'pkill'?
After using just plain kill on Unix systems for many years, I learned pkill from a younger Linux-savvy co-worker colleague1.
I soon accepted the Linux-way,pgrep-ing and pkill-ing through many days and nights, through slow-downs and race…
belacqua
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100
votes
2 answers
Difference between /var/log/messages, /var/log/syslog, and /var/log/kern.log?
For the purposes of kernel logging, why do I have three different, non-inclusive levels of logging amongst /var/log/messages, /var/log/syslog, and /var/log/kern.log?
A Student at a University
- 1,685
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100
votes
9 answers
Why does ssh's “password” prompt take so long to appear?
When I try to ssh, the password prompt takes too long (almost two minutes) to appear.
Why does this happen?
Neuquino
- 1,469
- 2
- 12
- 13
100
votes
19 answers
apt-get update failed because certificate verification failed because handshake failed on nodesource
Running sudo apt-get update on my AWS EC2 Ubuntu 18.04.01 LTS instance fails:
Certificate verification failed: The certificate is NOT trusted. The certificate issuer is unknown
when trying to access the deb.nodesource.com/node_10.x bionic…
Joe
- 1,129
- 2
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- 6
99
votes
2 answers
Firefox Middle Mouse Button Scroll
How can I get the middle mouse button to behave correctly in Ubuntu? Clicking the middle button does not show the arrow which allows me to scroll the page by moving the mouse.
Information:
Firefox 3.6.8
Mouse: Microsoft Intellimouse Explorer 3.0
The Pixel Developer
- 1,215
- 1
- 9
- 10
99
votes
4 answers
Where is "journalctl" data stored?
When I issue journalctl I get a massive log of all system services, but where is all this information stored?
php_nub_qq
- 1,479
- 3
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- 22
99
votes
4 answers
How do I install PostgreSQL 9.6 on any Ubuntu version?
How do I install PostgreSQL 9.6 on any Ubuntu version since it doesn't come by default with the most recent version?
Ubuntu Xenial (16.04) comes with PostgreSQL 9.5 from the default repositories.
Victor
- 9,233
- 9
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99
votes
5 answers
How to remove nodejs from Ubuntu 16.04?
Steps to replicate:
Ubuntu 16.04 xenial (x86-64)
sudo apt-get update
sudo apt-get install nodejs
sudo apt-get install npm
I want to uninstall nodejs and npm and have seen several posts which suggest this is the most common way:
sudo apt-get purge…
user1063287
- 2,255
- 3
- 18
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99
votes
9 answers
How to stop Ubuntu from talking to me?
The title may sound silly, but on Ubuntu 13.10, I'm getting frequent audible notifications using text to speech.
Is this the "speech dispatcher" and how can I disable it?
ljs.dev
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99
votes
4 answers
In virtualbox fullscreen mode, can I disable or move the popup menu bar?
I'm running XP in virtualbox cause I need Photoshop and Illustrator. It works great on my 5 year old laptop which is stunning, but there's a minor annoyance when I go fullscreen.
The menu bar is in the bottom middle, and it pops up over the content.…
joon
- 1,699
- 3
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99
votes
2 answers
How to install gcc-4.8
I checked the gcc version on my system.
It is currently at 4.6.3.
I read that gcc-4.8 is out.
I tried the following commands without success:
sudo apt-get install gcc (gcc is already the newest version)
sudo apt-get install gcc-4.8 (unable to…
MdT
- 1,093
- 1
- 8
- 6
99
votes
7 answers
How do I find out whether my system has USB 3.0 ports?
I want to buy an external USB 3.0 drive and I wonder how to figure out whether my laptop has such a port (or only 2.0).
Neither lsusb -v, nor /proc/bus/input/devices offers any obvious hints, although the former says a lot of 2.0 root hub which…
sds
- 2,513
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99
votes
6 answers
Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg)
I just upgraded from Ubuntu 21.10 to 22.04.
sudo apt update ends with the following warnings...
W: https://linux.teamviewer.com/deb/dists/stable/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION…
heynnema
- 68,647
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99
votes
3 answers
What is the NVIDIA Server Driver?
In the Software & Updates app in Ubuntu 20.04, in the Additional Drivers tab, there is an NVIDIA Server Driver option that I don't remember seeing in previous Ubuntu releases. The package name is nvidia-driver-440-server.
What are the differences…
acl
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