I am trying to open an MS Access database in Base using the instructions here . (I've tried both .mdb and .accdb)
I can follow the process described by Gord with no problems until the last step, where it asks me to save the database in LibreOffice format. I choose a filename (say mylinuxdb.odb), click OK, and then Base opens with this error:
The connection to the data source "mylinuxdb" could not be established.
org/apache/commons/logging/LogFactory
Note that it is complaining about the new .odb database, not the MS Access database. Nonetheless, no data is imported.
Can anyone help with this?
Thank you.
Revised answer:
It appears that this issue is specific to distributions like Linux Mint that install LibreOffice Base by default. Presumably in order to enable embedded HSQLDB databases they also install a rather old version of HSQLDB which conflicts with UCanAccess. To fix that, remove LibreOffice's copy of HSQLDB. For Linux Mint that would be
sudo apt remove libhsqldb1.8.0-java
(original answer)
I was able to reproduce your issue with LibreOffice 6.4.6.2 on Xubuntu 20.04. It looks like the setup instructions on Ask Ubuntu may need to be tweaked.
In the meantime try opening your .odb file, clicking through any errors. When Base opens, choose
Edit > Database > Properties …
and notice that the "Database URL" text box has "jdbc:" in front of it.
so if the textbox contains
jdbc:ucanaccess:///home/gord/Documents/Database1.accdb
then apparently Base will try to use
jdbc:jdbc:ucanaccess:///home/gord/Documents/Database1.accdb
and that won't work. We need to have just
ucanaccess:///home/gord/Documents/Database1.accdb
in the text box (as in the screenshot above).
This is NOT (as per chosen answer) "specific to distributions like Linux Mint that install LibreOffice Base by default". Such statements should be avoided as they are clearly very difficult to prove except with rigorous analysis of all other situations, which is clear was not done and in practical terms cannot be done.
I just encountered this message with an LO Base form which uses a MariaDB installation on Windows 10, using a JDBC connection with the mysql-connector-java-8.0.28.jar connector .jar. The form was created only minutes previously.
Interestingly, I happened to have a Python application running at the same time but, and I stress, this Python application does not use any kind of connection to any mysql database whatsoever. Nor, being CPython, does it use Java in any way whatsoever.
I find that when I close the Python application I am then able to open the LO Base form. Furthermore, after having first opened the LO Base form I am then able to run the Python application.
As to why this ludicrous error should arise in these circumstances in the first place, I do not yet know. Chalk it down to yet one more LO anomaly and oddity around which you have to navigate by hook or by crook.
Instructions for installing operating systems inside a VirtualBox virtual machine sometimes advise that the user ensures that the "Live CD/DVD" checkbox is checked. Other instructions don't mention this checkbox at all.
What is the purpose of this checkbox? Does its setting have any functional difference in the operation of a VirtualBox VM?
I am able to boot and install live CDs/DVDs regardless of this checkbox's setting, so I'm confused about why it's even there. I could not find a clear reference to this setting in the VirtualBox User Manual either (did I miss it?), leaving me further perplexed.
Here is a screenshot of the specific item I'm referencing:
Normally, when you eject a CD from the guest OS (e.g. right-click -> eject in File Explorer), it also removes the ISO from the drive (in VM settings page) and it becomes an empty CD drive.
With the "Live CD/DVD" box checked, the ISO is not removed when you eject the disk using the guest OS file explorer and it remains attached to the drive. So for example, if you were to eject the CD before rebooting, you'd still reboot to the Live CD. (without this option, it'd boot to an empty CD drive)
At first I was also unable to find an answer, but the mouseover (in my version) tells me:
Live CD/DVD
When checked, the virtual disk will not be removed
when the guest system ejects it.
Is anyone aware of a known issue (and workaround) where it seems like Rational ClearCase will corrupt a Microsoft Project file if it is checked out and the network connection changes? I have a laptop that is docked and hardwired to local network most of the time, and I perform some work with the Project file, then I will undock the laptop to go to a meeting or home for the evening, and upon re-docking, the Project file can no longer be opened and appears corrupt.
The error message shown is "Project cannot open the file. -Check that the file name and path are correct. -Check that the file format is recognized by Project..."
There doesn't seem to be anything directly related to Microsoft Project Server regarding ClearCase on ibm.com.
I have seen issues with dynamic views, when the view server is on the network (and said network is abruptly cut).
If this is your case, I would recommend using snapshot views.
You can have similar issue with ClearTeam 8.x web views (since the latest versions support dynamic views)
Regarding snapshot views (meaning files directly on your hard drive), you only need to watch for concurrent processes that might still access your file when undocking. A program like procmon can help.
We've just updated Nagios from 3.5.x to the current version (4.0.7) and subsequently added a new host for monitoring.
The new host shows as 'Down' in Nagios, and this seems to be related to the fact that pnp4nagios is not logging performance data (the individual checks for users, http etc are all find).
Initially there was an error that the directory
/usr/local/pnp4nagios/var/perfdata/newhost.com
that contains the xml setup and rrd files for the new host was missing), so I manually created this directory, but now it complains that the files are missing.
Does anyone know the appropriate steps to overcome this issue?
Thanks,
Toby
PS I'd tag this 'pnp4nagios', but that tag doesn't exist and I can't create them
UPDATE
It's possible that pnp4nagios is a red herring/symptom. Looking more closely I realise that Nagios actually believes the host is down, even though all services are up. The host status information is '(Host check timed out after 30.01 seconds)'...does this make any more sense?
It's indeed very unlikely that pnp4nagios has something to do with your host being down. pnp actually exports output and performance data to feed the rrd database and xml files (via npcd module or evenhandler command).
The fact that nagios reports the host check timed out after 30 sec means that :
- you have a problem with your host check command, please double-check the syntax
- this check command times out after a certain timelapse (most likely defined in nagios.conf) because the plugin was still running.
I'd recommend running this command from the server's prompt. You want to do something like :
/path/to/libexec/check_command -H ipaddress -args
For example:
/usr/local/libexec/nagios/check_ping -H 192.168.1.1 -w 200,40% -c 500,80% -timeout 120
See if something might be hanging. Having the output would be helpful.
Once your host check returns correct output and performance data to nagios, pnp will hopefuly do the rest.
In the unlikely event it helps anyone, pnp4nagios was indeed a red herring. The problem was that ping wasn't enabled for the host being checked, and this is the test for whether a host is up or not. Hence this was failing, despite other services being reported as working.
I have the following boxes:
a) A Windows box with Eclipse CDT,
b) A Linux box, accessible for me only via SSH.
Both the compiler and the hardware required to build and run my project is only on machine B.
I'd like to work "transparently" from a Windows box on that project using Eclipse CDT and be able to build, run and debug the project remotely from within the IDE.
How do I set up that:
The building will work? Any simpler solutions than writing a local makefile which would rsync the project and then call a remote makefile to initiate the actual build? Does Eclipse managed build have a feature for that?
The debugging will work?
Preferably - the Eclipse CDT code indexing will work? Do I have to copy all required header files from machine B to machine A and add them to include path manually?
Try the Remote System Explorer (RSE). It's a set of plug-ins to do exactly what you want.
RSE may already be included in your current Eclipse installation. To check in Eclipse Indigo go to Window > Open Perspective > Other... and choose Remote System Explorer from the Open Perspective dialog to open the RSE perspective.
To create an SSH remote project from the RSE perspective in Eclipse:
Define a new connection and choose SSH Only from the Select Remote System Type screen in the New Connection dialog.
Enter the connection information then choose Finish.
Connect to the new host. (Assumes SSH keys are already setup.)
Once connected, drill down into the host's Sftp Files, choose a folder and select Create Remote Project from the item's context menu. (Wait as the remote project is created.)
If done correctly, there should now be a new remote project accessible from the Project Explorer and other perspectives within eclipse. With the SSH connection set-up correctly passwords can be made an optional part of the normal SSH authentication process. A remote project with Eclipse via SSH is now created.
The very simplest way would be to run Eclipse CDT on the Linux Box and use either X11-Forwarding or remote desktop software such as VNC.
This, of course, is only possible when you Eclipse is present on the Linux box and your network connection to the box is sufficiently fast.
The advantage is that, due to everything being local, you won't have synchronization issues, and you don't get any awkward cross-platform issues.
If you have no eclipse on the box, you could thinking of sharing your linux working directory via SMB (or SSHFS) and access it from your windows machine, but that would require quite some setup.
Both would be better than having two copies, especially when it's cross-platform.
I'm in the same spot myself (or was), FWIW I ended up checking out to a samba share on the Linux host and editing that share locally on the Windows machine with notepad++, then I compiled on the Linux box via PuTTY. (We weren't allowed to update the ten y/o versions of the editors on the Linux host and it didn't have Java, so I gave up on X11 forwarding)
Now... I run modern Linux in a VM on my Windows host, add all the tools I want (e.g. CDT) to the VM and then I checkout and build in a chroot jail that closely resembles the RTE.
It's a clunky solution but I thought I'd throw it in to the mix.
My solution is similar to the SAMBA one except using sshfs. Mount my remote server with sshfs, open my makefile project on the remote machine. Go from there.
It seems I can run a GUI frontend to mercurial this way as well.
Building my remote code is as simple as: ssh address remote_make_command
I am looking for a decent way to debug though. Possibly via gdbserver?
I tried ssh -X but it was unbearably slow.
I also tried RSE, but it didn't even support building the project with a Makefile (I'm being told that this has changed since I posted my answer, but I haven't tried that out)
I read that NX is faster than X11 forwarding, but I couldn't get it to work.
Finally, I found out that my server supports X2Go (the link has install instructions if yours does not). Now I only had to:
download and unpack Eclipse on the server,
install X2Go on my local machine (sudo apt-get install x2goclient on Ubuntu),
configure the connection (host, auto-login with ssh key, choose to run Eclipse).
Everything is just as if I was working on a local machine, including building, debugging, and code indexing. And there are no noticeable lags.
I had the same problem 2 years ago and I solved it in the following way:
1) I build my projects with makefiles, not managed by eclipse
2) I use a SAMBA connection to edit the files inside Eclipse
3) Building the project:
Eclipse calles a "local" make with a makefile which opens a SSH connection
to the Linux Host. On the SSH command line you can give parameters which
are executed on the Linux host. I use for that parameter a makeit.sh shell script
which call the "real" make on the linux host.
The different targets for building you can give also by parameters from
the local makefile --> makeit.sh --> makefile on linux host.
The way I solved that one was:
For windows:
Export the 'workspace' directory from the Linux machine using samba.
Mount it locally in windows.
Run Eclipse, using the mounted 'workspace' directory as the eclipse workspace.
Import the project you want and work on it.
For Linux:
Mount the 'workspace' directory using sshfs
Run Eclipse.
Run Eclipse, using the mounted 'workspace' directory as the eclipse workspace.
Import the project you want and work on it.
In both cases you can either build and run through Eclipse, or build on the remote machine via ssh.
For this case you can use ptp eclipse https://eclipse.org/ptp/ for source browsing and building.
You can use this pluging to debug your application
http://marketplace.eclipse.org/content/direct-remote-c-debugging
How to edit in Eclipse locally, but use a git-based script I wrote (sync_git_repo_from_pc1_to_pc2.sh) to synchronize and build remotely
The script I wrote to do this is sync_git_repo_from_pc1_to_pc2.sh.
Readme: README_git-sync_repo_from_pc1_to_pc2.md
Update: see also this alternative/competitor: GitSync:
How to use Sublime over SSH
https://github.com/jachin/GitSync
This answer currently only applies to using two Linux computers [or maybe works on Mac too?--untested on Mac] (syncing from one to the other) because I wrote this synchronization script in bash. It is simply a wrapper around git, however, so feel free to take it and convert it into a cross-platform Python solution or something if you wish
This doesn't directly answer the OP's question, but it is so close I guarantee it will answer many other peoples' question who land on this page (mine included, actually, as I came here first before writing my own solution), so I'm posting it here anyway.
I want to:
develop code using a powerful IDE like Eclipse on a light-weight Linux computer, then
build that code via ssh on a different, more powerful Linux computer (from the command-line, NOT from inside Eclipse)
Let's call the first computer where I write the code "PC1" (Personal Computer 1), and the 2nd computer where I build the code "PC2". I need a tool to easily synchronize from PC1 to PC2. I tried rsync, but it was insanely slow for large repos and took tons of bandwidth and data.
So, how do I do it? What workflow should I use? If you have this question too, here's the workflow that I decided upon. I wrote a bash script to automate the process by using git to automatically push changes from PC1 to PC2 via a remote repository, such as github. So far it works very well and I'm very pleased with it. It is far far far faster than rsync, more trustworthy in my opinion because each PC maintains a functional git repo, and uses far less bandwidth to do the whole sync, so it's easily doable over a cell phone hot spot without using tons of your data.
Setup:
Install the script on PC1 (this solution assumes ~/bin is in your $PATH):
git clone https://github.com/ElectricRCAircraftGuy/eRCaGuy_dotfiles.git
cd eRCaGuy_dotfiles/useful_scripts
mkdir -p ~/bin
ln -s "${PWD}/sync_git_repo_from_pc1_to_pc2.sh" ~/bin/sync_git_repo_from_pc1_to_pc2
cd ..
cp -i .sync_git_repo ~/.sync_git_repo
Now edit the "~/.sync_git_repo" file you just copied above, and update its parameters to fit your case. Here are the parameters it contains:
# The git repo root directory on PC2 where you are syncing your files TO; this dir must *already exist*
# and you must have *already `git clone`d* a copy of your git repo into it!
# - Do NOT use variables such as `$HOME`. Be explicit instead. This is because the variable expansion will
# happen on the local machine when what we need is the variable expansion from the remote machine. Being
# explicit instead just avoids this problem.
PC2_GIT_REPO_TARGET_DIR="/home/gabriel/dev/eRCaGuy_dotfiles" # explicitly type this out; don't use variables
PC2_SSH_USERNAME="my_username" # explicitly type this out; don't use variables
PC2_SSH_HOST="my_hostname" # explicitly type this out; don't use variables
Git clone your repo you want to sync on both PC1 and PC2.
Ensure your ssh keys are all set up to be able to push and pull to the remote repo from both PC1 and PC2. Here's some helpful links:
https://help.github.com/en/github/authenticating-to-github/connecting-to-github-with-ssh
https://help.github.com/en/github/authenticating-to-github/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent
Ensure your ssh keys are all set up to ssh from PC1 to PC2.
Now cd into any directory within the git repo on PC1, and run:
sync_git_repo_from_pc1_to_pc2
That's it! About 30 seconds later everything will be magically synced from PC1 to PC2, and it will be printing output the whole time to tell you what it's doing and where it's doing it on your disk and on which computer. It's safe too, because it doesn't overwrite or delete anything that is uncommitted. It backs it up first instead! Read more below for how that works.
Here's the process this script uses (ie: what it's actually doing)
From PC1: It checks to see if any uncommitted changes are on PC1. If so, it commits them to a temporary commit on the current branch. It then force pushes them to a remote SYNC branch. Then it uncommits its temporary commit it just did on the local branch, then it puts the local git repo back to exactly how it was by staging any files that were previously staged at the time you called the script. Next, it rsyncs a copy of the script over to PC2, and does an ssh call to tell PC2 to run the script with a special option to just do PC2 stuff.
Here's what PC2 does: it cds into the repo, and checks to see if any local uncommitted changes exist. If so, it creates a new backup branch forked off of the current branch (sample name: my_branch_SYNC_BAK_20200220-0028hrs-15sec <-- notice that's YYYYMMDD-HHMMhrs--SSsec), and commits any uncommitted changes to that branch with a commit message such as DO BACKUP OF ALL UNCOMMITTED CHANGES ON PC2 (TARGET PC/BUILD MACHINE). Now, it checks out the SYNC branch, pulling it from the remote repository if it is not already on the local machine. Then, it fetches the latest changes on the remote repository, and does a hard reset to force the local SYNC repository to match the remote SYNC repository. You might call this a "hard pull". It is safe, however, because we already backed up any uncommitted changes we had locally on PC2, so nothing is lost!
That's it! You now have produced a perfect copy from PC1 to PC2 without even having to ensure clean working directories, as the script handled all of the automatic committing and stuff for you! It is fast and works very well on huge repositories. Now you have an easy mechanism to use any IDE of your choice on one machine while building or testing on another machine, easily, over a wifi hot spot from your cell phone if needed, even if the repository is dozens of gigabytes and you are time and resource-constrained.
Resources:
The whole project: https://github.com/ElectricRCAircraftGuy/eRCaGuy_dotfiles
See tons more links and references in the source code itself within this project.
How to do a "hard pull", as I call it: How do I force "git pull" to overwrite local files?
Related:
git repository sync between computers, when moving around?