khm's questions

I'm sorry if this has already been asked or made clear in documentation, but I couldn't find an answer to this.

I am using an Ubuntu server to run a program and my program has a licensing page where I do the attributions required by the licenses of the programs I have installed. By default, Ubuntu has many programs installed and I want to know if I can just do the attribution for Ubuntu or if I need to specifically acknowledge the dozens of programs individually.

Does anyone know if this is officially spelled out somewhere? Or maybe if there is some unofficial but generally accepted practice?

I want to give credit where credit it due, but I also feel like listing every single program that makes up Ubuntu seems like overkill. I am of course listing the programs I installed myself, this question is only focused on the ones that come with it when Ubuntu is installed. Thank you for your help!

When I use vi, depending on the change I make, it will repeat the change over and over again when I hit Esc.

For example, if I go into a file and insert "6" then hit Esc, the program will suddenly show "666666666".

I tried experimenting and figured out that the same change will result in the same number of repeats. (So inserting "xyz" will always repeat n number of times)

It doesn't appear to be related to a certain character, character type, or sequence of characters. The repeat has been anywhere from one to hundreds of times. The entire change matters, so typing "6" is different from hitting delete then typing "6". (But typing delete then "xyz" will cause a repeat).

If I hit Esc and the repeat happens, then I go back to insert mode and get rid of the repeat, it won't happen again because the delete or backspace presses count as a different change.

This occurs enough that I can guess other changes that will cause it to repeat. It only gets really inconvenient when the repeat happens hundreds of times and it takes 5 minutes to delete them.

I am using the server version of Ubuntu 11.04 (I know it's not supported, but I doubt it is related to this issue) and vim 2:7.3.035+hg~8fdc12103333-1ubuntu7.

Has anyone heard of this happening before? Am I accidentally triggering this with a stray keystroke? Is there a setting I need to change?

I found this error when using Ubuntu 16.04.1. It also occurs on Ubuntu 12.04.5, 14.04.5, 16.04.3, debian 9.1.0, and apparently any version of the kernel after 3.1.10.

The error occurs when I put the OS on a compact flash, plug the CF into a card reader that supports both USB 2.0 and 3.0, and plug the card into the USB2.0 port of a PC. During or after it boots the error will occur and make the entire system read-only. It sometimes occurs during boot; usually occurs within a few minutes to a few hours after boot; sometimes takes 24ish hours to occur; and once took 48ish hours to occur. I know as soon as it occurs because the terminal (since I am using the server version I don't have a GUI) will suddenly display the error. When the error occurs after boot it is as follows:

blk_update_request: I/O error, dev sda, sector 2624440[this number can change]
Buffer I/O error on device sda1, logical block 275975[this number can change]
Aborting journal on device sda1-8
JBD2: Error -5 detected when updating journal superblock for sda1-8.
EXT4-fs error (device sda1): ext4_reserve_inode_write:5146: Journal has aborted
EXT4-fs (sda1): Remounting filesystem read-only

The first two lines may repeat several times before the others appear. This is variable.

If the system goes read-only before the boot can even finish I see the following error after logging in:

Unable to setup logging. [Errno 30] Read-only file system: 
‘/var/log/landscape/sysinfo.log’
run-parts: /etc/update-motd.d/50-landscape-sysinfo exited with return code 1
/usr/lib/update-notifier/update-motd-fsck-at-reboot: 33: /usr/lib/update-notifier/update-motd
oot: Read-only file system

In journalctl I see the following:

usb 1-1: reset high-speed USB device number 2 using ehci-pci
sd 0:0:0:0: [sda] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
sd 0:0:0:0: [sda] tag#0 Sense Key : Unit Attention [current]
sd 0:0:0:0: [sda] tag#0 Add. Sense: Not ready to ready change, medium may have changed
sd 0:0:0:0: [sda] tag#0 CDB: Write(10) 2a 00 00 28 0b e8 00 00 10 00
blk_update_request: I/O error, dev sda, sector 2624440[this number can change]
Aborting journal on device sda1-8.
EXT4-fs error (device sda1): ext4_journal_check_start:56: Detected aborted journal
EXT4-fs (sda1): Remounting filesystem read-only
EXT4-fs (sda1): ext4_writepages: jdb2_start: 6144 pages, ino 34333; err -30

Rebooting will cause the system to become rw again but inevitably the error will occur and it will become read-only again.

Running on the USB3.0 port does not produce the error. Running with a card reader that only supports USB2.0 does not produce the error.

The card readers that have produced the error: Transcend TS-RDF8K, Delkin DDREADER-42, Kingston FCR-HS3 and FCR-HS4, Lexar LRW400CRBNA. The cards that have produced the error: Kingston 4GB, Transcend CF170. The platforms that have produced the error: (1.2GHz VIA Eden X4 quad-core processor + VIA VX11H MSP), (VIA EPIA-P820 + EPIA-P720 Pic-ITZ boards), (GA-H170-HD3 + Intel Core i7-6700K 4.0GHz + super micro X7SPE-HF-D525)

This occurs with both brand new and slightly used hardware. It occurs with Ubuntu/Debian freshly installed and after edited for my own purposes. It occurs both with putting a vhd on the CF and with installing the OS directly to the CF card.

There does not appear to be any specific event that occurs before the error except for the USB reset shown in journalctl.

I do not believe it to be a purely hardware issue, but rather a hardware + kernel issue since A: all of the above hardware works with kernel 3.1.10 and earlier B: I have used multiple cards/card readers/platforms of each type (and from different batches) incase one was malfunctioning

I have been using Ubuntu 11.04 with kernel 2.6.38-8-generic-pae for years with no problem.

Unfortunately I do not know specifically what is causing this, only under what circumstances it occurs. I have been told that it is a bug in the kernel, but I would like to ask here one last time before I decide to report it.

I tried to install a package and it did, and it appears to work just fine. However when I installed it I got several warnings about packages being missing.

dpkg: warning files list file for package '...' missing, assuming package has no files currently installed.

Since it is just a warning and it appears to work anyway, I assumed that it doesn't matter, but I would like someone to confirm that.

The packages that are missing are ones that I uninstalled on purpose because they were non-essential and took up a lot of room.

EDIT: Package is tzdata. Using dpkg -i on a .deb file to install. And the above is essentially the entire warning. Just instead of ... it lists packages. python2.7-minimal, libsqlite3-0, libaprutill-dbd-sqlite3, python-minimal`

EDIT: "What exactly did you do?" I ran the command

dpkg -i tzdata_2017b-2_all.deb

to install the package tzdata.

"What did you want to achieve?" I wanted the package to install.

"What happened instead? Did you encounter any warning or error messages?" The package installed and worked fine. However, the above warning appeared for the above packages.

I cannot copy and paste since this is occurring on a separate server. But I will rewrite it here:

dpkg: warning files list file for package python2.7-minimal missing, assuming package has no files currently installed.
dpkg: warning files list file for package libsqlite3-0 missing, assuming package has no files currently installed.
dpkg: warning files list file for package libaprutill-dbd-sqlite3, assuming package has no files currently installed.
dpkg: warning files list file for package python-minimal, assuming package has no files currently installed.

I am not looking for a fix. I am just curious if dpkg giving me a warning in this type of situation actually matters. Again the program works anyway and nothing else on my system needed those packages.

I have a 16.04 server set up on an SD card. I put the SD card into a Transcend USB 3.0 card reader. When I plug the reader into the USB 2.0 port on my physical server box, it works fine. When I plug it into the USB 3.0 port on that same server I get a ton of errors and it eventually just hangs indefinitely.

The errors have a few different variations.

Version 1:

Starting udev Kernel Device Manager...
(1 of 3) A start job is running for dev-disk-by\x2duuid...
(2 of 3) A start job is running for udev Kernel Device Manager (10s / 1min 32s)
(3 of 3) A start job is running for Monitoring of LVM2 mirrors, snapshots etc. using dmeventd of progress polling...
1: device not accepting address 2, error -62
b8-port1: Cannot enable. Maybe the USB cable is bad?
-port1: Cannot enable. Maybe the USB cable is bad?
:0:0:0: rejecting I/O to offline device
[69...] scsi 2:0:0:0: rejecting I/O to offline device
[69...] blk_update_request: I/O error, dev sda, sector 4206688
[69...] EXT4-fs error (device sda1): ext4_find_entry:1451: inode #1603: comm lvm: reading directory lblock 0
[69...] Buffer I/O error on dev sda1, logical block 0, lost synce page write
....

Version 2:

[OK] Reached target Sound Card.
(1 of 5) A start job is running for Tell Plymouth To Write Out Runtime Data...
(2 of 5) A start job is running for dev-disk-by\x2duuid...
(3 of 5) A start job is running for LSB: AppArmor initialization (12s / no limit)
(4 of 5) A start job is running for Set console font and keymap (13s / no limit)
(5 of 5) A start job is running for Flush Journal to Persistent Storage (15s / 1min 33s)
-port1: Cannot enable. Maybe the USB cable is bad?
-port1: Cannot enable. Maybe the USB cable is bad?
[68...] JBD2: Error -5 detected when updating journal superblock for sda1-8.
[68...] Aborting journal on device sda1-8.
[68...] Buffer I/O error on device sda1. logical block 53913
[68...] JBD2: Error -5 detected when updating journal superblock for sda1-8.
....

In several places it says "Maybe the USB cable is bad?" I've tried several different readers. I know they all work with 2.0 so I doubt it's actually a problem with the reader. I also tried the second USB 3.0 port in the same server and it had the same problems. So I doubt it's a hardware problem, unless the whole box is broken.

So I have run into the common problem of eth0 being called something else (enpXsX) with systemd. So I have tried creating the file /etc/udev/rules.d/10-network.rules. That works just fine. The problem is that I need to take this exact copy of my server and using an SD card move it between several physical servers on a regular basis for testing. Because 10-network.rules needs the MAC address, it keeps changing everytime I plug the card into a new device. I have created a script that changes it automatically and I have it run as a service (changeMAC.service) on boot up.

This service runs fine. Unfortunately despite changing the MAC address before networking.service starts, networking always fails. To make it work, I have to reboot. I need it to start up correctly on the first boot.

Using systemd-analyze plot, I can tell changeMAC.service is in fact completing before networking.service. I thought the problem might be that it needs to start sooner. However I currently have one SD card where it does manage to start up in one go. But when I take that image and put it on my computer to run in VirtualBox, it goes back to needing a reboot. I can't find the differences between the SD card and the vhd.

I have also tried using ifup, ifdown, /etc/init.d/networking restart, systemctl start networking.service to force networking to reevaluate its situation and see 10-network.rules. The first three produce errors and won't execute, the last will execute but networking.service will again fail to start.

So I need to know either how to get changeMAC.service to run in time so that whoever needs 10-network.rules can get it, or I need to know how to force whoever needs 10-network.rules to restart without rebooting the whole system.

I just switched to 16.04 server from 14.04 server. With Upstart I used to start my server with a file that I had in /etc/rcS.d called M95. M95 was called by /etc/rc.local. Now with systemd I have written a file in /etc/systemd/system called my.service. It looks like this:

[Unit]
Description=MyService

[Service]
WorkingDirectory=/etc
ExecStart=/bin/sh rc.local

[Install]
WantedBy=multi-user.target

When I type "/bin/sh rc.local" into the command line my server does start. When I try to start the service by doing "systemctl start my.service" nothing happens.

The relevant lines in journalctl -b are:

Started MyService.
eth0 ...(basically the info I see from ifconfig)
root : TTY=unknown ; PWD=/etc ; USER=root ; COMMAND=/etc/rcS.d/M95
pam_unix(sudo:session): session opened for user root by (uid=0)
$File not found:: /new/den-routes
udhcpd already running
pam_unix(sudo:session): session closed for user root
/bin/rm: cannot remove '/var/log/rewriting-net-rules': No such file or directory.

In rc.local it looks like:

#!/bin/sh -e
...
sudo /etc/rcS.d/M95
/bin/rm /var/log/rewriting-net-rules

exit 0

In M95 it starts udhcpd (which is where the "udhcpd already running" message comes from) and at the end starts the server by saying:

cd /new
/bin/sh StartServer&

It seems that it does get to M95 because messages are getting logged from it, but the server does not start. When I run these files in the command line it works, but as the service it does not work. I am very unfamiliar with systemd so I have no idea if I am doing this correctly. For a week I have been reading examples and tutorials for it but I am still unsure how this works and how the service file should be written.

Edit: Here is my StartServer file:

#!/bin/bash
nohup /jre/jdk1.8.0_101/jre/bin/myserver -Xrs -Xmx1000m -jar /new/MyServer.jar nowd &

It runs just fine when I start it from the command line. It runs when I call it from my.service. I put in some echos to see that it gets through the whole file, but myserver and MyServer.jar don't start for some reason.

I just switched to an Ubuntu 14.04 server from an 11.04 server. In /var/spool/cron/crontabs/root I have the line:

* * * * * /root/arewerunning.sh > /root/appmon.log

arewerunning.sh looks like this:

#!/bin/sh

if P=$(pgrep aserver)
then
  echo  " "
else
  echo "aserver has stopped. System Will reboot"
sudo reboot now
fi

On the 11.04 server this was working. Whenever I killed aserver the system would reboot. But on 14.04 the command appears to be running but the system does not restart. cron.log looks like:

(root) CMD (/root/arewerunning.sh > /root/appmon.log)

when the process hasn't been killed and like:

(root) CMD (/root/arewerunning.sh > /root/appmon.log)
(CRON) info (No MTA installed, discarding output)

when the process has been killed. I know that the MTA line is because it is trying to email me and it can't, but that shouldn't prevent the reboot.

I have tried running the command outside of cron and it works just fine. I'm using a direct path so that shouldn't be a problem. I have also tried adding "sh" in front of the command. appmon.log isn't showing anything. I've tried putting other commands in the file and they work just fine.

I'm using 14.04 on a VirtualBox 32 bit server. I am logged in as the sudo user.

I am trying to install Java 8. I downloaded the file jre-8u101-linux-i582.rpm and used FTP to put it in the directory /jre. I try using the command rpm -ivh jre-8u101-linux-i582.rpm to extract and install it. When I do I get the error "failed dependencies" and then a long list of files that it apparently cannot find even though when I check in the specified directories the files are indeed there. When I researched the problem most people just said to use apt install.

So I tried to do that. I did "apt-get update" then "apt-get install oracle-java8-installer". Then I got an error saying "unable to locate package oracle-java8-installer". So I tried "add-apt-repository ppa:webupd8team/java". This gives me the error "Cannot add PPA ... Please check that the PPA name or format is correct." So I tried "apt-get install --reinstall ca-certificates". According to most of the asks on here that should have worked. The actual process of the reinstall worked but it did not fix my problem. I also tried "-E add-apt-repository ppa:webupd8team/java" but that did not work and that shouldn't have applied anyway because I was not behind a proxy.

So I need a solution to either the first problem or the second. Any help would be appreciated.