Questions tagged [ubuntu]
GENERAL UBUNTU SUPPORT IS OFF-TOPIC. Support questions may be asked at https://askubuntu.com/. Ubuntu is a free desktop and server operating system based on Debian GNU/Linux. This tag is for programming questions specific to Ubuntu.
ubuntu
61,154
questions
1362
votes
28
answers
3.7m
views
How can I close some specific port on Linux? [closed]
How can I remove the port that some application/process has used it but didn't close the port?
For example: when I run ssh on my ubuntu and tunnel the ssh connection on some port <PORT> on my ...
- 41.9k
894
votes
30
answers
2.0m
views
How to kill a process on a port on ubuntu [closed]
I am trying to kill a process in the command line for a specific port in ubuntu.
If I run this command I get the port:
sudo lsof -t -i:9001
so...now I want to run:
sudo kill 'sudo lsof -t -i:9001'
...
- 77.4k
868
votes
70
answers
2.7m
views
Cannot connect to the Docker daemon at unix:/var/run/docker.sock. Is the docker daemon running?
I have applied every solution available on internet but still I cannot run Docker.
I want to use Scrapy Splash on my server.
Here is history of commands I ran.
docker run -p 8050:8050 scrapinghub/...
- 20.6k
852
votes
15
answers
419k
views
ImageMagick security policy 'PDF' blocking conversion
The Imagemagick security policy seems to be not allowing me perform this conversion from pdf to png. Converting other extensions seem to be working, just not from pdf. I haven't changed any of the ...
- 8,476
737
votes
32
answers
705k
views
Docker error : no space left on device
I installed docker on a Debian 7 machine in the following way
$ echo deb http://get.docker.io/ubuntu docker main > /etc/apt/sources.list.d/docker.list
$ sudo apt-get update
$ curl -sSL https://...
- 19k
733
votes
8
answers
1.1m
views
Docker - Ubuntu - bash: ping: command not found
I've got a Docker container running Ubuntu which I did as follows:
docker run -it ubuntu /bin/bash
however it doesn't seem to have ping. E.g.
bash: ping: command not found
Do I need to install ...
- 84.4k
717
votes
37
answers
621k
views
Delete all local git branches
I follow a development process where I create a new local branch for every new feature or story card. When finished I merge the branch into master and then push.
What tends to happen over time due to ...
- 12.1k
660
votes
10
answers
1.1m
views
How to install Boost on Ubuntu
I'm on Ubuntu, and I want to install Boost. I tried with
sudo apt-get install boost
But there was no such package. What is the best way to install Boost on Ubuntu?
- 6,980
650
votes
13
answers
634k
views
How to permanently add a private key with ssh-add on Ubuntu? [closed]
I have a private key protected with a password to access a server via SSH.
I have 2 linux (ubuntu 10.04) machines and the behavior of ssh-add command is different in both of them.
In one machine, ...
- 10.4k
610
votes
31
answers
827k
views
Where does PostgreSQL store configuration/conf files?
I have recently installed PostgreSQL on Ubuntu with the EnterpriseDB package. I can connect to the database locally, but I can't configure it because I can't find config files. I searched through ...
- 11.2k
604
votes
34
answers
1.4m
views
How to install the JDK on Ubuntu Linux
Note: This is an old question and the answers reflect the world as it was then. Modern Ubuntu distributions have OpenJDK available which can be installed with
sudo apt install default-jdk
I am ...
- 6,119
587
votes
19
answers
433k
views
Nginx no-www to www and www to no-www
I am using nginx on Rackspace cloud following a tutorial and having searched the net and so far can't get this sorted.
I want www.mysite.example to go to mysite.example as normal in .htaccess for SEO ...
- 26.9k
569
votes
10
answers
175k
views
`require': no such file to load -- mkmf (LoadError)
I was trying to install rails on Ubuntu Natty Narwhal 11.04, using ruby1.9.1.
I installed ruby using apt-get install ruby1.9.1-full which contains the dev package. I googled the error and all have ...
- 8,604
545
votes
30
answers
840k
views
How can I stop redis-server?
I apparently have a redis-server instance running because when I try to start a new server by entering redis-server, I'm greeted with the following:
Opening port: bind: Address already in use
I can'...
- 18.9k
541
votes
10
answers
809k
views
How to add users to Docker container?
I have a docker container with some processes (uwsgi and celery) running inside. I want to create a celery user and a uwsgi user for these processes as well as a worker group that they will both ...
- 8,268
525
votes
19
answers
259k
views
Cannot install packages using node package manager in Ubuntu
NodeJS interpreter name(node) on Ubuntu has been renamed to nodejs because of a name conflict with another package. Here's what the readme. Debian says:
The upstream name for the Node.js ...
- 6,099
521
votes
2
answers
1.1m
views
Lost httpd.conf file located apache [closed]
How can I find where my httpd.conf file is located?
I am running an Ubuntu Linux server from the Amazon Web Services EC2 (Elastic Compute Cloud) and I can't find my Apache config.
- 8,163
513
votes
8
answers
583k
views
How to append one file to another in Linux from the shell?
I have two files: file1 and file2. How do I append the contents of file2 to file1 so that contents of file1 persist the process?
- 13.2k
508
votes
13
answers
765k
views
Adding a new entry to the PATH variable in ZSH
I'm using zsh terminal, and I'm trying to add a new entry (/home/david/pear/bin) to the PATH variable. I don't see a reference to the PATH variable in my ~/.zshrc file, but doing echo $PATH returns:
/...
- 9,317
485
votes
7
answers
202k
views
.bashrc at ssh login
When I ssh into my ubuntu-box running Hardy 8.04, the environment variables in my .bashrc are not set.
If I do a source .bashrc, the variables are properly set, and all is well.
How come .bashrc isn'...
- 16k
475
votes
54
answers
2.2m
views
error: 'Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)' -- Missing /var/run/mysqld/mysqld.sock
My problem started off with me not being able to log in as root any more on my mysql install. I was attempting to run mysql without passwords turned on... but whenever I ran the command
# mysqld_safe ...
- 15.4k
460
votes
12
answers
255k
views
Clear a terminal screen for real [closed]
Using the clear command on the terminal only fools the user into thinking the screen has been cleared...you can still see output from the previous commands when you scroll using the mouse. This makes ...
- 29k
455
votes
12
answers
298k
views
How to install lxml on Ubuntu
I'm having difficulty installing lxml with easy_install on Ubuntu 11.
When I type $ easy_install lxml I get:
Searching for lxml
Reading http://pypi.python.org/simple/lxml/
Reading http://codespeak....
- 58.9k
452
votes
25
answers
452k
views
Yarn install command error No such file or directory: 'install'
I am installing sylius bundle and while install sylius I need to run yarn install So
While I run the command:
yarn install
I get the error:
ERROR: [Errno 2] No such file or directory: 'install'
- 4,777
451
votes
21
answers
992k
views
Running a cron every 30 seconds
Ok so I have a cron that I need to run every 30 seconds.
Here is what I have:
*/30 * * * * /bin/bash -l -c 'cd /srv/last_song/releases/20120308133159 && script/rails runner -e production '\''...
- 43.7k
450
votes
32
answers
872k
views
How to tell if tensorflow is using gpu acceleration from inside python shell?
I have installed tensorflow in my ubuntu 16.04 using the second answer here with ubuntu's builtin apt cuda installation.
Now my question is how can I test if tensorflow is really using gpu? I have a ...
- 7,761
449
votes
13
answers
313k
views
How do I escape spaces in path for scp copy in Linux?
I want to copy a file from remote to local system. Now I'm using scp command in linux system. I have some folders or files names are with spaces, when I try to copy that file, it shows the error ...
- 4,605
441
votes
19
answers
449k
views
How to install python3 version of package via pip on Ubuntu?
I have both python2.7 and python3.2 installed in Ubuntu 12.04.
The symbolic link python links to python2.7.
When I type:
sudo pip install package-name
It will default install python2 version of ...
- 159k
404
votes
28
answers
588k
views
nginx - nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
All of a sudden I am getting the below nginx error
* Restarting nginx
* Stopping nginx nginx
...done.
* Starting nginx nginx
nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
...
- 77.4k
394
votes
20
answers
1.2m
views
How to find which version of TensorFlow is installed in my system?
I need to find which version of TensorFlow I have installed. I'm using Ubuntu 16.04 Long Term Support.
- 4,243
390
votes
22
answers
241k
views
nodejs vs node on ubuntu 12.04
I installed nodejs on ubuntu from instructions given here
When I write node --version in the terminal I see this :
-bash: /usr/sbin/node: No such file or directory
I can see node in the /usr/sbin/ ...
- 14.2k
384
votes
2
answers
225k
views
Color picker utility (color pipette) in Ubuntu [closed]
I'am looking for a color picker utility on Ubuntu/Debian.
Anything simple and easy to use.
- 4,743
374
votes
10
answers
841k
views
How do I install the OpenSSL libraries on Ubuntu?
I'm trying to build some code on Ubuntu 10.04 LTS that uses OpenSSL 1.0.0. When I run make, it invokes g++ with the "-lssl" option. The source includes:
#include <openssl/bio.h>
#include <...
- 147k
367
votes
22
answers
383k
views
Cannot install NodeJs: /usr/bin/env: node: No such file or directory
I'm trying to install nodeJs into my Ubuntu 14.04 in order to use GruntJs.
I've read about Ubuntu different way of doing it (issues?), so this is what I've done in order to install it:
sudo apt-get ...
- 14.9k
367
votes
28
answers
779k
views
How do I SET the GOPATH environment variable on Ubuntu? What file must I edit?
I am trying to do a go get:
go get github.com/go-sql-driver/mysql
and it fails with the following error:
package github.com/go-sql-driver/mysql: cannot download, $GOPATH not set. For more details ...
- 4,181
358
votes
33
answers
632k
views
"git submodule update" failed with 'fatal: detected dubious ownership in repository at...'
I mounted a new hard disk drive in my Linux workstation. It looks like it is working well. I want to download some repository in the new disk. So I execute git clone XXX, and it works well. But when I ...
- 3,689
341
votes
13
answers
379k
views
Repeat command automatically in Linux
Is it possible in Linux command line to have a command repeat every n seconds?
Say, I have an import running, and I am doing
ls -l
to check if the file size is increasing. I would like to have a ...
- 35.2k
334
votes
32
answers
723k
views
After installing with pip, "jupyter: command not found"
After installing with pip install jupyter, terminal still cannot find jupyter notebook.
Ubuntu simply says command not found. Similar with ipython. Did pip not get install properly or something? ...
- 8,048
324
votes
42
answers
953k
views
Docker Error bind: address already in use
When I run docker-compose up in my Docker project it fails with the following message:
Error starting userland proxy: listen tcp 0.0.0.0:3000: bind: address already in use
netstat -pna | grep 3000
...
- 4,624
314
votes
4
answers
150k
views
Install MySQL on Ubuntu without a password prompt
How do I write a script to install MySQL server on Ubuntu?
sudo apt-get install mysql will install, but it will also ask for a password to be entered in the console.
How do I do this in a non-...
- 4,279
308
votes
8
answers
320k
views
sh: 0: getcwd() failed: No such file or directory on cited drive
I am trying to compile ARM code on Ubuntu 12.04 (Precise Pangolin).
Everything is working fine when I put the code in the local directory.
But when I put the code in the cited mount directory, an ...
- 3,089
307
votes
8
answers
335k
views
What is makeinfo, and how do I get it?
I'm trying to build GNU grep, and when I run make, I get:
[snip]
/bin/bash: line 9: makeinfo: command not found
What is makeinfo, and how do I get it?
(This is Ubuntu, if it makes a difference)
- 48.5k
305
votes
13
answers
226k
views
Eclipse cannot load SWT libraries
Every time I try to open Eclipse in Ubuntu 12.04 I get an Unsatisfied Link Error and it will not open. I have recently installed the java JDK and Android SDK, could this be the problem? I followed ...
- 6,003
300
votes
31
answers
227k
views
set up device for development (???????????? no permissions)
I am using a Samsung galaxy nexus phone (Android 4.0 platform) .
I am developing Android app on Ubuntu linux OS. I would like to run my application directly on the Samsung handset device, so I ...
- 42k
300
votes
17
answers
400k
views
Allow docker container to connect to a local/host postgres database
I've recently been playing around with Docker and QGIS and have installed a container following the instructions in this tutorial.
Everything works great, although I am unable to connect to a ...
- 6,209
296
votes
3
answers
125k
views
Window appears off screen on ubuntu [closed]
I have a dual monitor setup, and I am using Ubuntu 12.04 LTS
I have changed the positioning of the monitors several times, and now for some reason some of the windows open up off-screen (outside of ...
- 3,659
294
votes
6
answers
496k
views
How to run cron job every 2 hours? [closed]
How can I write a Crontab that will run my /home/username/test.sh script every 2 hours?
- 8,459
290
votes
25
answers
684k
views
Unable to set default python version to python3 in ubuntu
I was trying to set default python version to python3 in Ubuntu 16.04. By default it is python2 (2.7). I followed below steps :
update-alternatives --remove python /usr/bin/python2
update-alternatives ...
- 4,308
289
votes
45
answers
470k
views
Getting permission denied (public key) on gitlab
My problem is that I can't push or fetch from GitLab. However, I can clone (via HTTP or via SSH). I get this error when I try to push :
Permission denied (publickey) fatal : Could not read from ...
287
votes
7
answers
914k
views
How can I completely uninstall nodejs, npm and node in Ubuntu [closed]
The Question is similar to How do I completely uninstall Node.js, and reinstall from beginning (Mac OS X) but for Ubuntu, and just for uninstalling.
Installation was done by: sudo apt-get install node
...
- 3,915