Linux Distributions

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A Linux distribution is an operating system made as a software collection based on the Linux kernel and, often, on a package management system and are available for a variety of systems. A typical Linux distribution comprises a Linux kernel, GNU tools and libraries, additional software, documentation, a window system (the most common being the X Window System), a window manager, and a desktop environment. Most Linux systems are open-source software made available both as compiled binaries and in source code form, allowing modifications to the original software. Over three hundred distributions are in active development, including commercially backed distributions (such as Fedora, openSUSE and Ubuntu) and community-driven distributions (such as Debian, Slackware, Gentoo and Arch Linux).

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I have created an Ubuntu 18.04.4 server preseed file and I am attempting to use it with the 18.04.4 iso for a bare metal load.
In the boot string I am using auto=true and url=http://server/preseed.cfg.  I am able to read the file from the web server successfully bi a browser.
The loader starts and reads the preseed file successfully from the web server and then the loader jumps right to the interactive questions.

I have validated the file is good per multiple examples on Ubuntu’s site. I can find no reason that the preseed is not working as expected.  

Any suggestions would be greatly appreciated.
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boot ko after bios _osi linux query ignored.

Hello all

I have a system that will not boot and just hang after the above message ( see attached photograph ) from an old ubuntu 14

I am pretty sure the issue is hardware since the os has multiple bootable oses and all of them hang somewhere after an acpi message. Tested with multiple linux and freebsd kernels. Not tested windows yet.

... and the laptop fell yesterday. It did work for s few hours normally afterwards and was cleanly shutdown without issues

My questions are

Do you happen to know what is the next step in the boot sequence ? I suspect loading graphic drivers but i am unsure and a dmesg output would help.

Do you happen to know some options i can pass the kernel in order to circumvent and go on with my work till i fix this ? I tried various combinations of noapic noacpi vga... i would be more than happy with a working command line and a vesa screen

Thanks for your time
IMG_20200221_081832.jpg
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Hi Experts,

What script or software can I use on Ubuntu 18.04.3 i386, for the following:
- Check whether there is a wlan internet connection
- if there is a internet connection, do nothing.
- if there is no internet connection reconnect to a predefined SSID
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hi am not able to see my linux desktop after connecting with vnc
vnclnx
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I am trying to launch chromium-browser on the startup of the Ubuntu:ionic docker container, but encountering below error.

(chromium-browser:1570): Gtk-WARNING **: 15:36:04.321: cannot open display:


Can someone help me with this?
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how to increase resolution is xrandr - s 1200x1600 am in linux ubuntu
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Hi,

A friend has created an image and I am using VMWare player 15 to open it.  The system image is on UBUNTU. I am trying to login to it using the GUI interface and what I got after login is a field like this root@chwoodman01:~#  (see screenshot attached)

There is a command-line I can type to see the Graphic User Interface?

Can you please advise?
Ubuntu-screenshotJPG.JPG
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i have a samba domain (4.3) on ubuntu. i try to make a raise.
i open a active directory trust and under action select raise domain functional leve

dialog box coming op "you cannot raise the domain functional level because this domain includes Active Directory Domain controllers that are not running the appropriated version of windwos.

What is wrong here?
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i try to run firefox on ubuntu server 18. i wrote
export DISPLAY=:0
then firefox &

Failed to connect to Mir: Failed to connect to server socket: No such file or directory
Unable to init server: Could not connect: Connection refused
Error: cannot open display: :0
0
how to move lxd to other profile?
i have custom profile myprofile. when i move lxd to new server for startup lxd it always using default profile.
how to move lxd prifle
i manually did lxd profile edit myprofile and at the end of file add my lxd and manually remove it from default lxd.
but it's not working.
Is there any procedure to do it?
0
I'm trying my hardest to setup the notifications for Nagios Core to send emails. I have done a ton of research to figure out why my system will not send emails but to no luck. I will be happy to give you all that you need code wise, I am jsut going to start with a few pieces though.

my command.cfg file
define command{
    command_name notify-host-by-email
    command_line /usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\n\nService: $SERVICEDESC$\nHost: $HOSTALIAS$\nAddress: $HOSTADDRESS$\nState: $SERVICESTATE$\n\nDate/Time: $LONGDATETIME$\n\nAdditional Info:\n\n$SERVICEOUTPUT$" | /usr/bin/mail -s "** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ **" $CONTACTEMAIL$
    }
 
# 'notify-service-by-email' command definition
define command{
    command_name notify-service-by-email
    command_line /usr/bin/printf "%b" "Subject: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ - Service Alert\n\n***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\n\nService: $SERVICEDESC$\nHost: $HOSTALIAS$\nAddress: $HOSTADDRESS$\nState: $SERVICESTATE$\n\nDate/Time: $LONGDATETIME$\n\nAdditional Info:\n\n$SERVICEOUTPUT$\n$LONGSERVICEOUTPUT$\n" | /usr/sbin/sendmail -vt $CONTACTEMAIL$
    }

error log on nagios core:

[01-29-2020 23:09:15] Warning: Notifying contact 'Tyler' of host 'KS-006' by command '/usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: CUSTOM\n\nService: $SERVICEDESC$\nHost: …
0
In Linux I am getting this message:

Package 'linux-modules-extra-5.3.0-28-generic' is not installed, so not removed
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
 linux-image-generic-hwe-18.04 : Depends: linux-modules-extra-5.3.0-28-generic but it is not going to be installed
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).

How can I correct this?
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how to move jenkins to another jenkins installation (not restore the old one  add the new one)? both is ubuntu 18.04
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i take a export from my lxd:  (from ubuntu 18.04 with snap installation of lxc version 3.19 and using zsf)
lxc publish CONTAINER_NAME --alias my-lxd
lxc image export my-lxd .
then move tarball to my new server (ubuntu 18.04.3 default lxc (version 3.0.3installation using zfs )
lxc image import bxxxx.tar.gz --alias my-lxd
then i try to create a new-lxd-name with command
lxc init my-lxd new-lxd-name

UNIQUE constraint failed: storage_volumes.storage_pool_id, storage_volumes.node_id, storage_volumes.name, storage_volumes.type
HELP
0
Linux Mint was installed on an older computer, while still keeping Windows 10.
When it boots it automatically has the option for Linux first and then Windows afterward.
If nothing is done, it boots in Linux.
I want to reverse that.
How can I configure it so that the option is Windows first and if nothing is done it will boot in Windows ?
0
I have an Apache2 installation running on Ubuntu 18.04.

Can someone please clarify for me how to make the URLs generated by Apache case insensitive.

I have looked at a many articles online and although they all seem to agree that you need to enable the 'speling' module (ironic that is misspelled) they don't seem to agree as to the next steps and many articles are up to 10 years old.

Can some one clearly layout all steps I need to take or if not direct me to a clear current article on it ?

I don't want the spelling checked - only that the case of the URL does not matter.

Many thanks,
0
is it possible to join sonarqube to jenkins and use jenkins managment to login to sonar?
0
my (ubuntu)lxd ip is not none as host in master .
i create a simple lxd with command
lxc lunch ubuntu:18.04 test
in test i create 01-netcfg.yaml with local static ip 10.74.0.13
restart lxd, and back to master host ping ip 10.74.0.13 host is unreachable. i can ping this host from all other host but not from master host
0
I have an Ubuntu 18.04 VM which is used to supply images via a browser. This VM has it's '/var/www/html' dir mounted to a Window 2008 share on another server.

This has worked well for months and suddenly (I think after an Ubuntu update) Apache will no longer serve up files except HTML (also stored on the share). When I try to access the files in the browser I get either the message "ERR_INVALID_HTTP_RESPONSE" or a multiple lines of metadata like "content-type", then the file contents viewed as text data.

I have looked in the '/var/log/syslog' and when I try to access one of those images I get the following in entry in the log:
CIFS VFS: SMB Signature verification returned error =5

This suggests that the issue is something to do with the mounted directory / share.

My questions are:
1) Why should this happen after months of working well ?
2) How come all files produce that error except 'index.html' - since all files (inc. 'index.html) are in the shared folder
3) how can I resolve this ? I have tried a system reboot and a 'mount -a' command (which produced no errors)
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hi,

heard about this: https://www.nuodb.com/

what make nuodb so special for banking and what is the different between MonGO DB and nuoDB ? pros and cons between them please.
0
unable to login to ubuntu via ssh as domain user.
the port 22 is open. i login to server before, but after upgrade is not possible.
i donot cehck upgrade list is something to upgrade pam .
on /var/log/auth.log:
Access denied for user by PAM account configuration ....
as root wbinfo -u : give me all user account .
0
Have a VirtualBox environment.
There are two hosts within the environment:

1) MITM Host

OS - Ubuntu Desktop 16.04

It's aim to capture all traffic from Android KitKat Host.
It has network settings as described on the scheme.

It's routes scheme:

default via 10.0.2.2 dev enp0s3  proto static  metric 100 
10.0.2.0/24 dev enp0s3  proto kernel  scope link  src 10.0.2.15  metric 100 
169.254.0.0/16 dev enp0s8  scope link  metric 1000 
192.168.3.0/24 dev enp0s8  proto kernel  scope link  src 192.168.3.1  metric 100 

Open in new window


For my task I'm using following iptables commands:
iptables -t nat -A PREROUTING -p tcp -m multiport --dports 443,9080,9081,5228 -j REDIRECT --to-ports 8443
iptables -t nat -A POSTROUTING -o enp0s3 -j MASQUERADE

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And ports redirection:
sysctl -w net.ipv4.conf.all.forwarding=1

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Also I have *dnsmasq* service to set IP address on *Android KitKat Host*:
interface=enp0s8
dhcp-range=192.168.3.10,192.168.3.100,96h
dhcp-option=option:router,192.168.3.1
dhcp-option=option:dns-server,192.168.3.1

Open in new window


2) Android KitKt Host

OS - Android KitKat 4.4
It's aim to run the debugged application.
It has network settings as described on the scheme.
It's routes scheme:
default via 192.168.3.1 dev eth0 
default via 192.168.3.1 dev eth0  metric 204 
192.168.3.0/24 dev eth0  scope link 
192.168.3.0/24 dev eth0  proto kernel  scope link  src 192.168.3.70  metric 204 
192.168.3.1 dev eth0  scope link 

Open in new window


Netstat is showing following network activity:

Open in new window

0
How to train our own model with custom objects through Tensorflow 2.0 .

UPDATE: Since tensorflow 2.0, has been released, I will share the compatible cuda and cuDNN versions for it as well (for Ubuntu 18.04).

tensorflow-gpu = 2.0.0
cuda = 10.0
cuDNN = 7.6.0
0
is it possible to create a template for onlyoffice in nextcloud.?
how?
0
Hello,
I want to log all rysylog I configure and everything is fine.
I create a new template that is:
template(name="stdSQLformat" type="string" option.sql="on" string="insert into SystemEvents (Message, Message2, Facility, FromHost, Priority, DeviceReportedTime, ReceivedAt, InfoUnitID, SysLogTag) values ('%msg%','%msg:R,ERE,0,DFLT,1:([0-9]+\.){3}[0-9]+[:]?([0-9]+)?"--end%', %syslogfacility%, '%HOSTNAME%', %syslogpriority%, '%timereported:::date-mysql%', '%timegenerated:::date-mysql%', %iut%, '%syslogtag%')")
but when I run rsyslog I get:
error during parsing file /etc/rsyslog.d/mysql.conf, on or before line 8: invalid character '"' in object definit
I know that the problem is with
%msg:R,ERE,0,DFLT,1:([0-9]+\.){3}[0-9]+[:]?([0-9]+)?"--end%
but I don't understand what I have to do !
thanks.
0

Linux Distributions

27K

Solutions

20K

Contributors

A Linux distribution is an operating system made as a software collection based on the Linux kernel and, often, on a package management system and are available for a variety of systems. A typical Linux distribution comprises a Linux kernel, GNU tools and libraries, additional software, documentation, a window system (the most common being the X Window System), a window manager, and a desktop environment. Most Linux systems are open-source software made available both as compiled binaries and in source code form, allowing modifications to the original software. Over three hundred distributions are in active development, including commercially backed distributions (such as Fedora, openSUSE and Ubuntu) and community-driven distributions (such as Debian, Slackware, Gentoo and Arch Linux).