Ubuntu :: Printing - Identical Scenarios, Different Results?
Jun 3, 2011
I'm running Edubuntu 10.10 64 bit on an LTSP box here at work. Two of them, in fact. In each instance, we have a Ricoh MP2500 network printer.
Scenario 1 - I print, it works. Scenario 2 - I print, the printer heats up, the wheels spin, yet it never actually prints a page. Each box is from the same Edubuntu install CD. Each box is set up as identically as possible with very minimal differences (aside from software set, as one is for Middle School and the other for High School) Each scenario has an identical printer. Each scenario has the same printer driver.
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Mar 12, 2011
I'm trying to find out which one is safer when it comes down to recovery process in case of a drive failure
A RAID5 created in mdadm
or
a Stripe RAID created on pure LVM
the RAID is purely for data storage for a SAMBA server, the OS will reside on its own drive.Ideally the RAID physical hard drives should be re-build on another machine in case of catastrophic server failure (mother board problem, or any other random problems as an example)I can't decide which of the 2 software RAID method is more convenient and safest, don't care about performance, it'll be a dedicated server for mass storage, it's going to mirror other 3 file servers on fakeRAIDs (dmraid), it's simply a redundant backup for the backups
The important goal here is portability.from what've read it appears that LVM might be more portable?but according to some dated (2009) info the mdadm seems to be a bit buggy when it comes to rebuilding the array, yet LVM doesn't appear that safe either which one would you pick for ease to rebuild on catastrophic failures?
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Apr 6, 2010
I'm timing how long it takes to run a command foo. I'm looking to append the results from the time command to a file, and discard the results from the foo command. I tried the following, but it didn't do what I want:
$ time ./foo > /dev/null >> output_from_time_command.txt
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May 31, 2010
I expected more from ubuntu 10.4 with regards to printing with exact size photos and with poor auto colour printing but the situation remains unchanged! for instance .. the photo size configurations for ubuntu/fspot/gimp and others are not compatible with my printers (HP and Brother) .. here in Europe a typical standard size photo (10x15inches or 150x100mm are not even on the Ubuntu listing? I have tried all listed possibilities including "custom" (which does not seem to ever work correctly?)and the result at best is photos with uneven boarders or at worse my printer goes a bit crazy with much wasted photo paper and expensive ink ...even photos selected for "no boarders" still produces photos with the self same uneven boarders.
I have tried pretty much everything over time following advice in this forum and including using HPlip and updating drivers required for my Brother printer but the root problem seemingly lies with the Ubunto photo size setup listing. Working with Ubuntu over the years I have found that it can do pretty much everything that Windows can do except for this dam ongoing photo quality and configuration problem.
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Jul 28, 2010
We developed qt based application in linux. I wish to stop ejecting the paper after printing over.How to do it.
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Sep 29, 2010
I have discovered that I have two partitions, on separate hdd's with identical UUID's, and the system switches back and forth erratically on restarts between the two different partitions, giving me the current /home or the /home of two months ago when I did the upgrade.
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Apr 29, 2010
I have RC now, downloaded a week ago. Thinking of re-installing the final one when it's out (very soon!) will there be any difference?
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Jan 12, 2010
I have two identical hard drives; same make, same manufacturer, same model, and same capacity, which I'm trying to run in a RAID1 mirroring scheme. The problem: configuration files for md arrays only lets me use device names, such as /dev/sdb and /dev/sdc. To keep these the same (and in the same order) when I boot I wanted to write a udev rule for them. Unfortunately, I have no way to differentiate between these two drives, as they seem to be identical. Normal methods of differentiating by size or model name wont work. I think I can use UUIDs; but I neither know how to get the UUID of a device/partition, nor do I know how to use it (if it is possible) in a udev rule.
Solution:
run
udevadm info --query=all --path=/sys/block/sdb # or whatever block dev
Look for and use "ID_SERIAL_SHORT" which is unique even for identically manufactured disks. Write a udev rule based on this property.
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Sep 3, 2010
How do I boot with two identical drives? I have two identical Western Digital WD6400AAKS SATA-II 7200 rpm 640 GB hard drives. One of the drives is an internal drive on one machine. The second is available with a mobile drive bay. I can't boot the system with both drives installed. The kernel boots fine but then halts when handing off to init. The error message is:
Warning: unable to open an initial console
...
Kernel panic - not syncing: No init found. Try passing init= option to kernel.
I can place the mobile drive in a different system that does not have the same drive installed and that system will boot fine from either drive. I'm reasonably certain the problem is caused by the two drives being so identical. I suspect the problem is the kernel cannot distinguish the difference. The model numbers are identical. No, I don't have other SATA drives to use. I am not using raid. The BIOS is not configured to use raid. How do I boot with two identical drives?
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Feb 25, 2011
i have an sql table with 2 columns i run a script that randomly selects a word from the table in column 1.
the word is displayed on the screen and I guess what it means i concatenate the randomly selected word and the answer the script looks for a match in mysql if it finds a match it says "Good job!" if there is no match it will say "not correct". However when i get it right it says not correct even though when i echo the variables they look exactly the same. the script below:
#!/bin/bash
var=$(mysql translator -u root --password=*-N<<EOF
SELECT word FROM tagalog ORDER BY RAND() LIMIT 1
EOF
)
[Code]....
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Jun 7, 2010
Suddenly, my "Places --> Desktop" folder is identical to my "Places --> Home Folder". This happened by accident somehow, and the folders and files in my Home Folder "/home/rj" are displayed on my desktop, and I don't want them to be.
When I click on "Places --> Desktop" it's as if I've clicked on "Places --> Home Folder" (the "File Browser" directory opens, the location is set at "/home/rj", and the title at the top is "File Browser").
Elementary stuff for a lot of you, I'm sure, but I'm blanking on how the Desktop folder can be restored to what I'd like it to be (basically empty, except for a "Downloads" folder), and my folders and files kept off the actual desktop (except for the "Downloads" folder).
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Aug 9, 2010
The company I work for use Ubuntu on the PC's that control the system they manufacture. To simplify and speed up the OS install we use a standard PC (all the same hardware) and install a disk image on each system. The disk image was produced from one of the systems and the network settings were set to use a Static IP
However every time we clone a system the network settings change from the static IP settings to Roaming Mode.
why this happens or if it is possible to have the static IP settings remain after the clone?
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Jan 12, 2010
I have two identical 73 GB Scsi ulta320 scsi drives, Fedora web server is install on one drive with all web files and etc. I wish to make an exact clone of the drive that will boot and run everything as the current drive does now. Is there a download of a program I could download or purchase that would boot and make an exact clone to do the above.
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Oct 7, 2010
I have two identical laptops. One has an installed Ubuntu and parts that I want to use. The box itself is all beat up. The other box is newer but has a stale edition of linux. (Stale software means "seldom used.") I thought to be clever I would pull drive-A from box-A and install it into box-B. Likewise, I would install drive-B into box-A. This will leave my clunky software on my battered box and my newer software on the newer box.
Mechanically it works (doh!). However, neither box will see the network. When I look at the logs, I find a "rename wlan0 to wlan1" entry among others. If I put the drives back into their original box, all works correctly.
What could be going on that I cannot move the drives and have things just boot and run?
I thought that system start would detect the installed hardware, load the required drivers and all is right with the world. The "rename" log entry suggests that the old hardware details are somehow in the way of the new hardware discovery and configuration.
Is there some command I need to use or utility that I ought to run that says, "rediscover my hardware" or similar?
I already know how to use clonezilla and other ways to duplicate a drive contents to a second drive. (Note to reader: laptop drive to usb drive clonezilla takes quite some amount of time.)
Another reason that this is important lies in the ability to move a drive from in-use but failed hardware to stand-by working hardware in a fail soft recovery situation. I know that win-doze knows about the installed hardware and demands a re-install or "repair" to the alternate box... but this is linux not win-doze.
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Feb 12, 2010
What's the consensus on the least hassle-prone method to do a bare metal install on multiple machines? I've just been handed a network with 20 identical servers (they're ~4 year old HP quad-Opteron machines with identical hardware configs). They're currently running a mishmash of stuff and I've been told I can re-purpose them. I'd like to create a generic kickstart and pave over them all with CentOS 5.4 with the only difference being the IP address for each machine. I have physical access to the machines and already know the MAC address for each one. Sadly, they are racked up and have no floppy or optical drive, but they DO have an exposed USB port on the front panel.
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Jul 7, 2011
I have two servers (A and B) which are identical. My idea was to have a software RAID 1 with both of them running and if server A craps out I wanted to swap the hard drives from server B into server A. When I tried to test this idea the network driver doesn't seem to want to cooperate. ifconfig gives nothing and I can't figure out why. From googling I've read that a network card has a unique ID on it (I'm assuming their talking about the MAC address) and is used in some config files which is why swapping hard drives gives two different MAC addresses and confuses the system. If that is so would anyone know exactly what config files the mac address is stored/used in? That way I can make a backup of those files and swap those out if I ever need to swap out the hard drives.
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Jan 24, 2011
I have two entries (identical ones) of the same app under Applications on my gnome panel. How can I remove one of them?
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Apr 8, 2010
I have two identical servers, one has RHEL 5 and Zimbra installed and the other is currently not really doing anything. Both have hardware RAID (Adaptec) set to RAID10, identical hard drives, etc. The RHEL/Zimbra machine is set up with LVM2. Is it possible for me to hook them up on the secondary NICs and boot the second machine with Knoppix or something else, and easily tell it to duplicate the first machine onto the second, down to the last bit, or do I need to make all the partitions beforehand and dd each one separately?
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Jun 15, 2011
I am trying to do a comparison of two folders, let's call them dir1 and dir2 and remove any items that have the same file name in both folders from dir2.
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Jul 18, 2011
The goal is to make connection calls (ssh, ping, ...) possible from one LAN (LAN-1) to a number of (at the moment two) separate smaller LANs.These smaller LANs (LAN-2a, LAN-2b, ...) have exact same specifications (same IP range, same number of nodes, ...)!The idea is to use a Fedora box (release 14 with 2.6.35.6-45.fc14.i686) and implement an appropriate iptables routing/forwarding.The Fedora box has three network interfaces:
- eth0 (aaa.bbb.ccc.m) on LAN-1 (aaa.bbb.ccc.0/24)
- eth1 (ddd.eee.fff.n) on LAN-2a (ddd.eee.fff.0/27)
- eth2 (ddd.eee.fff.p) on LAN-2b (ddd.eee.fff.0/27)
[code]....
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May 16, 2011
i have a problem in finding block of identical strings...i solved the problem in finding consecutive identical words and now i want to expand the code in order to find and remove consecutive identical block of strings... for example the awk code removing consecutive identical word is:
Code:
#!/usr/bin/awk -f
BEGIN{
RS="[[:space:]]+";
ORS=""
[Code].....
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Apr 14, 2010
I have logwatch 5.2.2 setup for 51 RHEL servers (mostly RHEL 4.8) and they all forward to a central server for a single email to be sent each day. This part works great. However, the "Disk Space" section is identical for every one of the entries. Obviously, this cannot be true for every server. What do I need to adjust such that real disk space data is being reported (or at least reported for the servers that are running low)?
The other entries like sendmail, pam_unix, and sshd data are working great and unique for each server.
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Jan 17, 2011
At work, I have a laptop configured with CentOS 5.5 that we will be using to run latency tests on two different mobile networks. To do so, we have two Novatel USB HSPA+ wireless modems connected, and configured using wvdial. The problem we are having right now is, wvdial is configured using the path to the modem to connect (/dev/ttyUSB0 for Network#1 and ttyUSB5 for Network#2), which only works if we insert the modems in the right order. I've tried alot of udev rules and what not to try and hard code the device names to something like /dev/modem_network1 and /dev/modem_network2, but that doesn't seem to work.
So at this point I'm trying to take a step back and a fresh look at the problem. Can anyone give me any information regarding where I should begin to get this done?
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Sep 2, 2015
Just installed Debian 8, coming from Ubuntu12, it seems I cannot get my dual monitors to work as it should.
I want two monitors side by side, currently I have two identical outputs. I looked around a bit and register two possible problems.
root@bigcem101-debian:/home/bigcem101# xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 640 x 400, current 1024 x 768, maximum 1024 x 768
default connected primary 1024x768+0+0 0mm x 0mm
1024x768 0.00*
800x600 0.00
640x480 0.00
720x400 0.00
Hence, problem 1: it is as if there is only one monitor detected. Then I tried to look for Xorg.conf ..... and: problem 2 xorg.conf is not there. This seems to be normal but when I installed my Ubuntu years ago it was still there and one could manually set things. There must be something new I am missing.
Card:
VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV670 [Radeon HD 3690/3850]
It seems I have both ati and radeon installed.
root@bigcem101-debian:/home/bigcem101# X -configure
(EE)
Fatal server error:
(EE) Server is already active for display 0
I am clueless.
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Jul 4, 2010
I've installed F13 on two Dell E6400 laptops, both with Broadcom BCM4312 wireless cards. After updating them both, I enabled the RPMFusion repos and installed the akmod-ed wireless driver on each (following these instructions: [URL] Wireless works perfectly on one laptop, but doesn't seem to be working on the other. The wl module is activated (shows up in lsmod) and the wireless card is enabled (wlan0 shows up in ifconfig), but Network Manager isn't showing any available networks. For the record, wireless works on both laptops with Ubuntu 9.10 I am going to try cloning the entire drive on the working laptop and sticking it on the dud one.
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Dec 16, 2010
On Fedora 13 if I change a theme for Firefox the buttons are always spaced the same way. If I try to install the Vista theme style of Ff the forward and backward page view buttons will not be joined but be separated and placed the same distance apart as the original Firefox theme. Also this concept matches my file manager layout.
So my thinking is there must be an application somewhere up on the chain that controls (template) for windows themes, GTK maybe? Whatever controls the themes must be an API of another program. What is this program and can it be edited to change the control button template?
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Jun 15, 2011
/media/A and /media/B should be identical, but I want to confirm before deleting one.
Duplicate file finders don't work, because they'll find two copies of the same file within B, for instance. I only want to confirm that every file in one is identical to the other.
diff -qr /media/A/ /media/B/ seems to work, but the output is cluttered with garbage like
diff: /media/A//etc/alternatives/ControlPanel: No such file or directory
and
File /media/A//dev/tty8 is a character special file while file /media/B//dev/tty8 is a character special file
I can suppress the former with 2> /dev/null, but I don't know about the latter.
rsync -avn /media/A/ /media/B/ also produces a bunch of clutter, like "skipping non-regular file".
How can I compare the two trees and just make sure that all the real files exist in both and are identical?
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Jan 4, 2010
We are running a combination of Apache-2 with mod_jk connecting to tomcat workers running on separate hardware.Strange: "netstat -tn" on the Apache server outputs identical combinations of source address, source port, destination address and destination port.
Has anybody else experienced this phenomenon? (I googled and searched LQ but couldn't find anybody else reporting this)Is netstat broken, or is there another explanation?
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Jan 12, 2010
Need confirmation if the following scenario works for making my client and server as identical?
My local(source) Linux server @192.168.0.2
My remote Linux client @192.168.0.70
On the local system :
#df -m
Filesystem Mounted on
/dev/hda3 /
/dev/hda1 /boot
tmpfs /dev/shm
On the local system , issue the followings to make client and server as identical :
#dump -0uvf - /dev/hda3 | ssh root@192.168.0.70 -c "restore -rf - /"
#dump -0uvf - /dev/hda1 | ssh root@192.168.0.70 -c "restore -rf - /boot"
#dump -0uvf - /dev/shm | ssh root@192.168.0.70 -c "restore -rf - /tmpfs"
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Jan 17, 2011
I am new to the forum and new to Linux.
I am trying to explore if Linux can be run on a multicore platform when the max frequency of one the cores is less than the others.
please give me some pointers or let me know if you have tried such HW configuration.
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