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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What is the difference between “sudo su -” and “sudo su -l”?

On Xubuntu 14.04, looking at the man pages, su - and su -l should be the same. -, -l, --login Provide an environment similar to what the user would expect had the user logged in directly. I ...
11
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7answers
32k views

How do I work with GUI tools over a remote server?

I have an Ubuntu server running on EC2 (which I didn't install myself, just picked up an AMI). So far I'm using putty to work with it, but I am wondering how to work on it with GUI tools (I'm not ...
0
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0answers
8 views

Many troubles trying to mount QNAP NFS server on Ubuntu mount point

I have a QNAP TS-251 NAS with a pair of 4 GB drives set up as RAID 1, running as a server, mainly for backups. It has the default operating system, QTS 4.2.0 (2016/01/19), which I think is current. It'...
0
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1answer
11 views

Remote desktop VNC from Ubuntu to CentOS7 showing strange view

I'm trying to use remote desktop on my LAN to access a machine's gui from another computer. The machine I am working on is Ubuntu14.04LTS using KDE desktop. The target machine is CENTOS7 with MATE ...
0
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0answers
24 views

How to render ASP.NET's Script Manager followed by the UpdatePanel in webpage on Ubuntu 16.04?

I wish to find out how to render ASP.NET's Script Manager followed by the UpdatePanel in an webpage on Ubuntu 16.04. The following aspx script code runs fine on Windows 7 Microsoft Visual Studio 2013 ...
2
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2answers
21 views

Adding permanent routing

Each time when I start my computer I type in the console sudo route add -net xxx.xxx.xxx.xxx netmask 255.255.240.0 gw xxx.xxx.xx.xxx When computer is rebooted or switched Off/On I must re-enter ...
0
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0answers
5 views

After taking some screenShot , bash prints “(shutter:13396): Unique-DBus-WARNING **: Error while sending message

On my Application in ubuntu 14.04 system, i am using this command : system("shutter -s 12,32,613,786 -o sample.jpg"); on action of specific button , after several times of clicking on this button, ...
1
vote
1answer
79 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 ...
0
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1answer
20 views

How to install Ubuntu Touch on an iphone 4?

Is it possible to install Ubuntu Touch on an iPhone 4? In my research, some claimed it wasn't, but I'm not convinced. I found some tutorials for the Nexus phone, and a forum thread, but it wasn't very ...
0
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0answers
18 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? User "...
-2
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0answers
26 views

System.NullReferenceException occurs when System.Web.Util.HttpEncoder.GetCustomEncoderFromConfig is executed [on hold]

I would like to find out how to fix the following exception I encountered on Ubuntu 16.04 running a large and complex ASP.NET 4.0 Framework application which uses the Apache Server and XSP4 with the ...
1
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0answers
24 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.xxx 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 ...
0
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0answers
22 views

Create user who can only ssh and reboot machine [duplicate]

I have a problem when I want to create user for SSH and rebooting the machine only. What I did is I just created a normal user. But normal user can access other commands like reboot, vim, ps, etc. I ...
0
votes
1answer
49 views

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 ...
1
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0answers
16 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/...
1
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0answers
23 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-...
1
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0answers
37 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....
1
vote
2answers
493 views

Asus UX303UA rebooting instead of resuming from suspend (ubuntu 15.10)

I installed ubuntu 15.10 (kernel 4.2.0-22-generic) on a brand new Asus UX303UA laptop. Almost everything works fine, but I have some trouble with suspending: When the laptop is plugged in (charging), ...
1
vote
0answers
9 views

rsyslog is still sending messages to omusrmsg even after using `stop` command

I have the following lines in the 50-default.conf file (in /etc/rsyslog.d): local0.emerg stop *.emerg :omusrmsg:* But all local0 messages are still being sent to every user logged ...
0
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0answers
12 views

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 ...
0
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0answers
34 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 ...
0
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0answers
21 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 ...
0
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0answers
12 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 ...
1
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0answers
51 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" ...
0
votes
1answer
18 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 ...
0
votes
1answer
891 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/...
0
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0answers
8 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-...
1
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0answers
21 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 ...
2
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0answers
21 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 ...
0
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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 ...
3
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0answers
41 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 ...
0
votes
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.
0
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0answers
22 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 ...
1
vote
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 ...
1
vote
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 ...
0
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0answers
91 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: [...
0
votes
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 ...
1
vote
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 ...
3
votes
0answers
29 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 ...
0
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1answer
98 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 ...
0
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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 ...
0
votes
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 ...
0
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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 ...
2
votes
1answer
88 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 ...
2
votes
0answers
14 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 ...
0
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0answers
24 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 ...
0
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0answers
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 ...
0
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0answers
28 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 ...
0
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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 ...