Greatest Hits
146
votes
20
answers
547k
views
"dev/sda1: clean, ..." This message appears after I startup my laptop, then it won't continue booting
dev/sda1: clean, 552599/6111232 files, 7119295/24414464 blocks
After I turn on my laptop this message appears. The system never boots, the message just stays there.
- 1,569
768
votes
40
answers
1.3m
views
How do I remove old kernel versions to clean up the boot menu?
Every time I install a new Linux kernel, it gets left in the grub_config, making the boot menu longer each time.
I know I can manually search through the installed packages and remove them.
Does ...
184
votes
7
answers
312k
views
apt-key deprecation warning when updating system: "Key is stored in legacy trusted.gpg keyring"
Recently I've noticed some issues when running apt where the system will warn me of a keyring deprecation:
Reading package lists... Done
Building dependency tree... Done
Reading state information... ...
- 22.2k
577
votes
28
answers
923k
views
How can I install Sun/Oracle's proprietary Java JDK 6/7/8 or JRE?
I want to install Oracle's JRE and to update to the latest version with the Software Updater when they released. Is there a Ubuntu package that is provided by Canonical or Oracle?
Before release Java ...
- 10.2k
488
votes
12
answers
1.7m
views
How to use "grep" command to find text including subdirectories
I want to find all files which contain a specific string of text. The grep command works, but I don't know how to use it for every directory (I can only do it for my current directory). I tried ...
- 8,355
73
votes
7
answers
205k
views
Terminal not opening on Ubuntu 22.04 on Virtual box 7.0.0
I'm using windows 10 and I installed Ubuntu 22.04 on Virtual box 7.0.0.
When I click the terminal icon, the upper left side of the screen(where is the executing application name view), there is the ...
- 841
578
votes
3
answers
1.5m
views
How do I use variables in a sed command?
I tried the following code to replace QQ with ZZ, but it doesn't do what I want:
var1=QQ
sed -i 's/$var1/ZZ/g' $file
However, this code does what I want:
sed -i 's/QQ/ZZ/g' $file
How do I use ...
- 17.6k
644
votes
24
answers
750k
views
How do I free up more space in /boot?
My /boot partition is nearly full and I get a warning every time I reboot my system. I already deleted old kernel packages (linux-headers...), actually I did that to install a newer kernel version ...
- 6,715
570
votes
9
answers
673k
views
What is the difference between a hard link and a symbolic link?
As the title says, I would like to know the difference between a hard link and a soft link created by the command ln. The command man ln does provide information, but does not sufficiently answer my ...
- 11.2k
401
votes
6
answers
1.6m
views
How to download a file from a website via terminal?
Suppose that we have a full URL of desired file e.g.
http://domain.com/directory/4?action=AttachFile&do=view&target=file.tgz
I would like to go without installing a new software. Is it ...
- 4,113
353
votes
13
answers
1.6m
views
How to format a USB flash drive?
In Windows there is a straightforward "Format" option in a flash drive's right-click pop-up menu. Where's that in Ubuntu?
- 57.1k
391
votes
4
answers
1.5m
views
How to set JAVA_HOME for Java?
I've installed a version of Java. How can we set the $JAVA_HOME environment variable correctly?
- 11.6k
451
votes
9
answers
1.2m
views
How do I install Python 3.6 using apt-get?
I've tried the normal way, sudo apt-get install python3.6, but... well... that didn't work.
So, how would I go about it? (I'd preferably not build it on my own)
I'm using Ubuntu 16.04.
- 4,653
293
votes
20
answers
1.6m
views
SSH connection problem with "Host key verification failed..." error
I can connect to another Ubuntu machine in my LAN via SSH. On both of then PC's I installed openssh-server
but from another Ubuntu computer I can not connect to my PC via SSH and I got this error:
...
- 3,143
322
votes
13
answers
1.7m
views
How do you restart Apache?
I switched from SLES to Ubuntu and now I want to restart my local server.
In SLES I used:
rcapache2 restart
but this seems not to work in Ubuntu.
How do I restart Apache?
- 4,019
224
votes
20
answers
1.3m
views
How to fix "sudo: unable to open ... Read-only file system"?
The title might not be as descriptive as I would like it to be but couldn't come up with a better one.
My server's file system went into Read-only. And I don't understand why it does so and how to ...
- 2,413
210
votes
18
answers
597k
views
ModuleNotFoundError: No module named 'distutils.util'
After updating to Ubuntu 20.04, whenever I run:
pip install <some package>
or
pip --version
it says:
adam@daryy:~$ pip3
Traceback (most recent call last):
File "/usr/local/bin/pip3&...
- 2,200
255
votes
9
answers
1.1m
views
How do I uninstall MySQL?
I installed MySQL using sudo apt-get. Now I need to remove it from my system.
How can I do that?
- 7,971
164
votes
5
answers
234k
views
Unable to update "Snap Store": cannot refresh "snap-store": snap "snap-store" has running apps (ubuntu-software)
I am a new Ubuntu 22.04 user who is facing an issue with the Snap
Store. Whenever I try to update the Snap Store I can see these error messages.
Pending update of "snap-store" snap
Close ...
- 1,953
575
votes
16
answers
1.2m
views
How do I check if I have a 32-bit or a 64-bit OS?
I downloaded and installed Ubuntu from the official site.
However, I don't know if I installed the 32-bit or 64-bit version.
In Windows 7 I could right click My Computer and it listed which version ...
- 8,017
856
votes
8
answers
1.6m
views
How to add existing user to an existing group?
I want to add the Apache user (www-data) to the audio group. I've read the man page for useradd, but I'm not having any luck. I'm running xubuntu 11.10. Here's what I'm doing:
$ sudo useradd -G audio ...
- 12.5k
632
votes
25
answers
1.4m
views
How to display network traffic in the terminal?
how to display the actual network traffic (wireless) in a terminal?
Additionally: Is it possible to add this info to the chart of top?
269
votes
11
answers
1.9m
views
How do I start/stop mysql server?
I tried to find in some articles describing how to correctly start & stop mysql server.
I found this link: How to start/stop MySql server on Ubuntu 8.04 | Abhi's Blogging World
I ran this ...
- 3,559
609
votes
7
answers
504k
views
Which one is better: using ; or && to execute multiple commands in one line?
In tutorials and how-to's I often see commands combined. For instance,
sudo apt-get update && sudo apt-get install pyrenamer
There seem to be four possible connectors: &, &&, || ...
- 28.7k
219
votes
23
answers
384k
views
sudo apt update error: "Release file is not yet valid"
I keep getting this error every time I try to sudo apt update:
Hit:1 ubuntu bionic InRelease
Ign:3 linux/chrome/deb stable InRelease
Get:2 /ubuntu bionic-updates InRelease [88.7 kB]...
user897956
125
votes
4
answers
1.4m
views
Changing from user to superuser
How do I change from user to superuser (root)? What command do I use in the Terminal to switch to root? I have tried --help but I get lost with all the listed help. I'm looking for a recent download/...
- 1,251
940
votes
5
answers
1.3m
views
How to extract files to another directory using 'tar' command?
I thought tar archive.tar /users/mylocation would work, but it doesn't. How can I do that?
- 9,503
307
votes
11
answers
1.8m
views
How can I uninstall software?
Seeing there are various ways to install on Ubuntu. What are the various ways to uninstall items?
Which ways always work? How can I be sure something was uninstalled?
- 34.2k
368
votes
10
answers
1.3m
views
How can I resize an ext root partition at runtime?
How can I increase the size of the root partition of a system at runtime?
I have a partition that is not allocated after the root partition (which is also ext4), how can I add that unallocated space ...
- 3,782
184
votes
6
answers
1.8m
views
How to copy files via terminal?
I have read about copying files with terminal but these examples will help me a lot. So here is what I want to do:
Examples:
I have a file in /home/levan/kdenlive untitelds.mpg and I want to copy ...
- 10.9k
121
votes
6
answers
1.3m
views
SSH Public Key - No supported authentication methods available (server sent public key)
I have a 12.10 server setup in a virtual machine with its network set to bridged (essentially will be seen as a computer connected to my switch).
I installed opensshd via apt-get and was able to ...
- 4,319
477
votes
8
answers
1.3m
views
How do I change my username?
Some time ago, when I installed Ubuntu, I chose a rather stupid username for my account that I do not want to use anymore.
How do I change this (including the name of my home directory, and the name ...
- 142k
96
votes
6
answers
264k
views
MongoDB Install Fails on Ubuntu 22.04 - Depends on libssl1.1 but it is not installable
Here are the standard installation instructions from the website:
wget -qO - https://www.mongodb.org/static/pgp/server-5.0.asc | sudo apt-key add -
echo "deb [ arch=amd64,arm64 ] https://repo....
- 1,346
656
votes
8
answers
1.4m
views
How can I decode a base64 string from the command line?
I would like to write a bash script to decode a base64 string. For example I type decode QWxhZGRpbjpvcGVuIHNlc2FtZQ== and it prints Aladdin:open sesame and returns to the prompt.
So far I have tried ...
- 20.9k
175
votes
11
answers
1.5m
views
Where is .bashrc?
I feel stupid asking, but I can't seem to find the answer to this anywhere. I'm trying to follow these instructions to edit my bash prompt, but there is no .bashrc in either my user directory (~/....
- 3,602
353
votes
7
answers
1.0m
views
How to make ZSH the default shell?
I am trying to set ZSH as my default shell, however it keeps reverting back to bash.
I have tried this code:
sudo chsh -s $(which zsh)
I've also tried:
sudo chsh -s /bin/zsh
Also tried these ...
- 3,899
449
votes
10
answers
1.4m
views
How to get to the GRUB menu at boot-time?
My system is not dual-boot, I run a standard Ubuntu desktop system "on the metal" (I think running it in a VM is the same).
Pressing c while booting does not cause the GRUB menu to appear (which I ...
- 24.7k
401
votes
4
answers
901k
views
Failed to load module “canberra-gtk-module” .... but already installed
Gtk-Message: Failed to load module "canberra-gtk-module"
but I already have the libcanberra-gtk-module and libcanberra-gtk3-module installed.
(i.e. I tried this solution, but it is already installed....
- 6,348
184
votes
17
answers
894k
views
How to install NVIDIA.run?
I have a Nvidia Ge force Ge6150 SE graphics card. I am running ubuntu 12.04. When I try to install the .run file it fails. It shows the message like this:
I tried to install it after uninstalling ...
- 2,103
249
votes
10
answers
1.3m
views
How to access a shared folder in VirtualBox?
I followed the steps for sharing folders between Windows 7 and Ubuntu in VirtualBox.
Despite that the folder appears with a X sign and gives me the following message when a try to open it:
The ...
- 2,625
235
votes
6
answers
1.7m
views
How do I remount a filesystem as read/write?
I'm trying to mount an hfsplus filesystem in a Xubuntu 12.04 VM (kernel version 3.2.0-23-generic) but when I type mount -o remount,rw /dev/sdb3 in command line it returns not mounted or bad option. ...
- 2,667
248
votes
12
answers
1.7m
views
How do I kill processes in Ubuntu?
How do I kill all processes running by my own non-root account?
I have some spinning smbd processes that I caused from my windows machine and so I telnetted into the linux server and I want to kill ...
- 3,704
102
votes
4
answers
437k
views
How to update Chrome in Ubuntu 20.04
What is the right way to update chrome on Ubuntu 20.04. My installation was with .deb file
I started getting update chrome warning messages on my chrome now. I do not want to uninstall and then ...
- 1,123
496
votes
10
answers
1.0m
views
How to select video quality from youtube-dl?
I have installed youtube-dl in my 14.04.
I can download video by following command,
$ youtube-dl [youtube-link]
But I want to know how to select available pixel quality of youtube video(i.e 1080p, ...
- 11.4k
133
votes
5
answers
1.2m
views
How to install Flash player on Ubuntu?
Even though I have the latest Adobe Flash player 11.2 for Linux in Firefox -
ref: Flash player security doubts - a particular online flash game still requests that I update to the latest flash player....
- 1,331
258
votes
12
answers
710k
views
Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
Upon trying to upgrade from 10.10 to 11.04 all seemed to go well until the restart. This error message is what comes up:
Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
...
- 2,835
99
votes
6
answers
658k
views
What does "No bootable medium found" mean in VirtualBox?
I have recently been trying to install VirtualBox, when this message came up:
No bootable medium found!
Can somebody please tell me what went wrong?
- 3,249
939
votes
9
answers
1.5m
views
How to enable or disable services?
I read about how to enable and disable services in Ubuntu and it seems that there are different possibilities to manage them.
The first method I found is update-rc.d to add new services to startup, ...
- 33.2k
226
votes
6
answers
1.5m
views
Detect and mount devices
I upgraded Ubuntu today and everything works smooth except that Ubuntu doesn't detect any other storage devices. My / and /home partitions work fine, but my other partitions are just not detected. I ...
- 3,443
754
votes
47
answers
1.0m
views
What should I do when Ubuntu freezes?
All operating systems freeze sometimes, and Ubuntu is no exception. What should I do to regain control when...
just one program stops responding?
nothing at all responds to mouse clicks or key ...
- 76.8k