Ubuntu is a Linux distribution with an emphasis on ease of use and installation. Note that http://askubuntu.com is specifically dedicated to Ubuntu questions.

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Error running Octave in Ubuntu 16.04

I just followed the answer in: How to install Octave without GUI in Ubuntu 16.04? to install octave in ubuntu 16.04 and apparently it worked fine. Running octave-cli in terminal apparently works But ...
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14 views

Why is it not possible to connect to my server using RSA from an Ubuntu machine?

I tried to connect to my server using ssh xxxx@xxxxxxx The result was: Unable to negotiate with xxx.xxx.xxx.xxx port 22: no matching host key type found. Their offer: ssh-dss Then I ran ssh ...
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21 views

Wifi suddenly stopped working

I have access to internet using a cable. I have an HP Pavilion dv6 Notebook and I'm on Ubuntu 14.04.4 LTS. ifconfig eth0 Link encap:Ethernet HWaddr 08:2e:5f:73:8c:9b inet adr:192....
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Converting A Physical Ubuntu Server with boot raid 1 to a Xen domu

So here's the situation: 1 physical server running a very outdated version of ubuntu 14.04 Booting off of a a software raid 1 configured in the installation. This server runs mission critical ...
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11 views

linux kernel grub/boot issue

I'm working with a specific software package that is only compatible with a older linux kernel version. After installing this older version via the following command sudo apt-get install linux-image-...
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9 views

Not able to install postgresql in Ubuntu 14.04

I tried many times installing postgresql in Ubuntu 14.04 without success. I keep getting the following error: Can't exec "/tmp/postgresql-common.config.WJ3dGb": Permission denied at /usr/share/...
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9 views

How to prevent special group to delete files or folders?

Folder path: /var/www/html group name: "ftpusers" user: admini" How to prevent from group "ftpusers" to delete files or folders in html folder, but allow them to create files or folders? and user "...
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28 views

Curl gets 200 OK, while browser shows 503

I have a bash script: code=$(curl -I -s -S --resolve $host:$port:$ip $link | grep 'HTTP/1.' | awk '{ print $2 }') if [ $code -eq 502 -o $code -eq 503 -o $code -eq 504 ]; then /usr/sbin/service ...
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14 views

Replacing Ubuntu 14.04 with Arch Linux on a dual boot Windows 10 configuration

I want to migrate to Arch Linux. I have read all about the installation process on Arch Wiki and got a fair idea about the process. But I have a doubt on how will the GRUB installed by Ubuntu behave ...
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7 views

ASUS UX501 - Ubuntu - touchpad doesn't work

On my brand new UX501 the touchpad works kind of ok (precision isn't great) but what does not work at all is the 2-fingers scrolling. I've been searching on Internet a lot but haven't find any ...
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44 views

How to send sudo password over pipe? [duplicate]

I need to replace existing sshd config on the remote PC and restart sshd, so I try to use this: cat /sshd_cfg | ssh user@192.168.0.47 "cat > /etc/ssh/sshd_config && service sshd restart" ...
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1answer
15 views

apt-get broke after trying to install wine

I'm a new Linux user. I use Kali Linux and tried to install wine via: sudo apt-get install wine winetricks This, however, didn't work as there were some errors. After that, I cannot install, update ...
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1answer
885 views

Ubuntu Postfix Open LDAP integration - no SASL authentication mechanisms

Ive followed all the steps in https://help.ubuntu.com/community/Postfix/DovecotLDAP but I am getting a localhost postfix/smtpd[12520]: fatal: no SASL authentication mechanisms in my /var/log/...
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7 views

Unusual performance of libblas-dev on Unbuntu 14.04

The package libblas-dev in Ubuntu 14.04 seems to have unusual performance (much faster) in some cases in the following question. http://stackoverflow.com/questions/38042451/cblas-gemm-time-dependent-...
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18 views

How Do You Permanently Disable All GUI Popups In Ubuntu 14.04?

I am working on configuring an Ubuntu 14.04 machine to act as a kiosk. The kiosk software runs it's own gui but occasionally, there are popups from Ubuntu with messages like "You should backup ...
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16 views

Apache Reverse Proxy - How to disable SSL frontside but allow SSL backside

I have an Ubuntu 14 LTS / Apache 2.4 server with mod_proxy/mod_rewrite configured for use as a reverse proxy. One of the servers on the backside is too old to support TLS. I would like to disable ...
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1answer
20 views

Guake works, but does not load/display a terminal [on hold]

Usually, installing and running Guake is sufficient to make it drop down a terminal (for instance /bin/bash). Somehow, I managed to get Guake to start with no terminal -- just a black, empty "window ...
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33 views

Console: Can't type special characters (Ubuntu 14.04)

We have linux-based computers (Ubuntu 14.04.4) prepared by other company to use their software. We have root password. Those computers has no X Window System. Just consoles. There is a problem with ...
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1answer
1k views

Curl Command PUT Method

curl -i -X PUT -H 'Content-Length: 1000' http://dfdc:dfdc@xx.xx.xx.xxx:xx/directory/ Above curl doesn't produce any response at Ubuntu shell prompt.
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21 views

allow specific ip range to connect to port socat backconnect

So, we have: server 1 and server 2. On server 2 I run the command: socat file:`tty`,raw,echo=0 tcp4-listen:443 To listen for connections from server 1. The problem is, if I visit the IP of ...
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1answer
66 views
+50

Strange things happen when I close my laptop lid

I recently bought a new HP Spectre x360 laptop and installed Linux (Ubuntu 16.04 LTS 64 bit) for the first time. I have noticed a few small bugs but something very strange happens when I shut the ...
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3answers
7k views

D-Link DWM-156 HSPA USB Modem doesn't work with SIM card inserted

I have a D-Link DWM-156 HSPA modem, that I bought just a few days ago. The modem has drivers in its internal storage. There are Debian packages (.deb) for both i386 and amd64, so obviously I installed ...
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2answers
30 views

Lost in the world of VPN

The Q. If i have a server, is it possible to have that server with a VPN connection, while simultaneously having an entirely separate connection to be able to SSH to from client machine. The Why. I ...
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90 views

Enabling SSL on ubuntu with apache2

I'm trying to get SSL working on my ubuntu VM. I'm going through the steps in this link but when I got to reload the apache service after enabling default-ssl.conf I'm getting errors in the log: [...
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1answer
25 views

Limit the number of mod_mono_server4 process instances to match the number of Apache server processes started up at Ubuntu 16.04 reboot timee?

How do I limit the number of mod_mono_service process instances to match the number of Apache server processes started up at Ubuntu 16.04 reboot time? The way to specify the number of Apache server ...
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3answers
1k views

Linux Permissions vsftpd

I have mybb installed and running in /var/www/forums. I have two users part of the www group, logan and www-data. I have the recursive permissions of forums directory set to: chmod -R 755 forums ...
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28 views

SSH with chroot and only working “sftp”, “rsync” (both)?

I have two users and one shared folder in my Ubuntu server: User writer, which has write access to /var/shared. It's an application regularly making file changes in this folder from remote, with SSH ...
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1answer
97 views

Is AWS AMI 'apache' equivalent to Ubuntu 'www-data'?

I'm trying to convert a Chef script that's used in AWS OpsWorks for an Ubuntu system to a script I can use with my AWS OpsWorks setup for my Amazon Linux AMI installation. Their Ubuntu Setup: sudo ...
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4answers
2k views

Installed Linux, now Windows doesn't boot anymore

I had a working Windows 8.1 which I used regularly. Today I needed Linux, so I chose Ubuntu and installed it from a bootable flash drive alongside Windows. Everything worked well, I could choose which ...
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1answer
38 views

How to start multiple mod-mono-server4 Linux process domains at reboot time?

I would like to know how to serve multiple ASP.NET applications on multiple mod-mono-server4 Linux process domains. I am running Ubuntu 16.04 on a Lenovo ThinkStation desktop. Here is how I plan to ...
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2answers
1k views

Install Arch Linux alongside Ubuntu 12.04

I have a windows 8.1 on which I installed Ubuntu 12.04 (dual OS). Now I also want to install Arch Linux alongside windows and ubuntu. Please tell me the how to do this on Ubuntu. I have a gparted ...
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1answer
82 views

clang-tidy install

I have clang installed from packages on both Ubuntu 14.07, Centos 7 and Fedoara 22. I would like to use clang-tidy but can neither find a package nor how to install it without installing clang from ...
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0answers
13 views

Limiting users ram with cgroups not working (for me)

I registred because I didn't manage running cgroups with several tutorials/comments/whatever you find on google. I want to limit the amount of ram a specifix user may use. Internet says "cgroups". My ...
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0answers
17 views

Ubuntu Server 16.04 - OpenVPN seems not to start, no logs get written

I installed and oepnvpn on a ubuntu server 16.04 by following the following guideline how-to-set-up-an-openvpn-server-on-ubuntu when I start the openVPN server with: service openvpn start it looks ...
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10 views

I'm unable to further install solus 1.2

Because once i enter the installation process it is automatically having an higher resolution than what my monitor can support. What changes can i make in any kernels to make the installation process ...
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27 views

Can detect but not connect to 5ghz?

One night I found out that I could no longer connect to my 5Ghz network. It happened rather suddenly. My fear is that it's a problem with the card, because I also cannot connect on Windows. I can see ...
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0answers
16 views

Kodibuntu install [on hold]

I'm trying to install Kodibuntu. I've created a bootable USB which works fine however I don't get the install menu at start-up? Also, is there anyway to configure WiFi settings from within Kodi? When ...
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0answers
21 views

Fatal error starting apache2 with mod_sssl [on hold]

I followed the instructions on this link to INSTALL SSL ON Ubuntu 14.04. After completing everything I get the following in the error log: [Fri Jun 24 19:10:26.262361 2016] [mpm_prefork:notice] [pid ...
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2answers
59 views

How to start up k=10 Apache2 server processes upon Ubuntu 16.04 alpha release reboot?

I would like to know how to start up k=10 Apache2 server processes upon Ubuntu 16.04 alpha release reboot. Yesterday, I read this URL, [https://rudd-o.com/linux-and-free-software/tuning-an-apache-...
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0answers
20 views

Why is Qt not installed?

I have followed installation steps from https://wiki.qt.io/Install_Qt_5_on_Ubuntu When I try qmake -v qmake: could not exec '/usr/lib/x86_64-linux-gnu/qt4/bin/qmake': No such file or directory ...
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0answers
18 views

Installation of openfire on UBUNTU in silent mode?

I am trying to install openfire 4.0.2 in silent mode. I am running the installation in Ubuntu 14.04. I have configured the database and configurations(openfire.xml) in respective path. When I am ...
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0answers
16 views

Login loop when trying Awesome with Gnome

I am trying to use the Awesome window manager with Gnome 3.16 in Ubuntu 16.04. Doing this is documented in several places: https://scaron.info/blog/awesome-with-gnome-on-ubuntu-14.04.html, https://...
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1answer
23 views

Using File manager with Second Hard Drive

I am going to install Ubuntu 16.04 on a new hard drive and install my current HD as a second drive. (It will stay there until I can copy over my /home directory to the new drive.) My questions is, if ...
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31 views

Trouble Joining an Active Directory Domain

I'm trying to join an Ubuntu 14.04 server to a Windows 2003 R2 domain. My admin says that from the controller side, it is part of the domain. But SSSD can't seem to start and DNS update fails. I've ...
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1answer
2k views

update-rc.d squid3 init.d init weirdness

sudo service squid3 status works, implying squid is in upstart. However a listing of services using sudo service --status-all does not show squid. Neither does sudo update-rc.d squid3 defaults ...
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1answer
231 views

E: sub-process /usr/bin/dpkg returned an error code (1) while updating php

I tried to update php to php5 and getting below errors. root@Ansible-VirtualBox:~# apt-get install -f Reading package lists... Done Building dependency tree Reading state information... Done ...
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1answer
150 views

apache2 no listening sockets available, but nothing listening on the port

I'm trying to setup SSL on an ubuntu server. I've generated a key and certificate with the following commands openssl genrsa -out mydomain.key 1024 and openssl req -new -key mydomain.key -x509 -out ...
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2answers
58 views

Using Grep Command Without Specifying a Certain Directory [closed]

Can you use the grep command without specifying a directory path afterwards? Example: $ sudo grep "filename" / I have also tried this: sudo find / -type f grep -l "filename" Still no luck. ...
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1answer
2k views

apache2.service Failed Because the Control Process Exited with Error Code

I am using Ubuntu 15 64-bit: $ uname -a Linux {hostname} 4.2.0-16-generic And I have installed apache2: $ sudo apt-get install -y apache2 I have a mod_xxx.so, which I have placed into: /usr/lib/...
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2answers
2k views

How to extract images from video file?

I mean, how to generate images files from a video like screenshots.