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I have a big problem - I managed to accidentally uninstall the whole PostgreSQL DBMS from my hard drive. I also lost my database and haven't made any dumps of the containing data. I do, however, have a backup of all files from the server. Is it possible to somehow restore the database from these files?
The OS I am using is Debian 6, and the DBMS version is PostgreSQL 8.4.
If it is indeed possible, then how should I go about achieving this?
ps. Sorry for my English.
Make sure your backup is safe. So long as we have that we can start again.
Restore the PostgreSQL server software (check package titles)
apt-get install postgresql-8.4 postgresql-client-8.4 postgresql-contrib-8.4
Stop the server
/etc/init.d/postgresql stop
Restore all your data files. Make sure the ownership is correct:
cd /var/lib/postgresql/8.4/
mv main main.OLD
cp -a /path/to/backup/main .
/etc/init.d/postgresql start
Check the logs (/var/log/postgresql/...) - if your backup occurred while the database was idle you are probably in luck.
Note that you need everything in .../main/ - the database files are in main/base but there are the transaction logs and other assorted bits and pieces needed too.
If you get problems, check your permissions, check your postgresql.conf file (restore that from backup too if you have it, pg_hba.conf etc too). There might be some other packages you need to install too if you were using pl/perl or some such earlier
Now. if you get problems complaining about missing log-files or bad blocks then that means the backup happened while the database was writing to the disk and there may be corruption. However, let's be optimistic and hope for the best.
If it works, check everything looks OK and take a pg_dump of any databases you want straight away.
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I am a massive fan of Homebrew and have taken to using it to manage all my applications. One very useful feature is brew switch which enables switching between different versions of Ansible. Something which I require to compile some of my websites running older software.
However, I have noticed that whenever I wish to run brew cleanup, it deletes all old versions even version 2.3.2.0 of Ansible which I still require alongside the most current version.
After sifting through numerous forums and sites I have been unable to find a solution which allows me to keep this old version of Ansible and the most current when using the brew cleanup command other than deleting everything manually.
Does anyone have a workaround or solution, I thought brew pin may be a possibility, but this seems to only work with the version currently linked.
I don't see a clean built-in way with brew cleanup to do this, but a workaround: since brew cleanup optionally takes a list of formulae to clean up, we can make such a list that contains everything but Ansible.
This is how I can get that list:
brew list | grep -v ansible
And this is how I can call cleanup to ignore Ansible:
brew cleanup $(brew list | grep -v ansible)
Maybe I want that as an alias somewhere, like bca for "brew cleanup (but not) ansible":
alias bca='brew cleanup $(brew list | grep -v ansible)'
and add that line to my ~/.bashrc.
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I have unfortunately deleted some important files and folders using 'rm -R ' command in Linux server.
Is there any way to recover?
since answers are disappointing I would like suggest a way in which I got deleted stuff back.
I use an ide to code and accidently I used rm -rf from terminal to remove complete folder. Thanks to ide I recoved it back by reverting the change from ide's local history.
(my ide is intelliJ but all ide's support history backup)
Short answer: You can't. rm removes files blindly, with no concept of 'trash'.
Some Unix and Linux systems try to limit its destructive ability by aliasing it to rm -i by default, but not all do.
Long answer: Depending on your filesystem, disk activity, and how long ago the deletion occured, you may be able to recover some or all of what you deleted. If you're using an EXT3 or EXT4 formatted drive, you can check out extundelete.
In the future, use rm with caution. Either create a del alias that provides interactivity, or use a file manager.
Not possible with standard unix commands. You might have luck with a file recovery utility. Also, be aware, using rm changes the table of contents to mark those blocks as available to be overwritten, so simply using your computer right now risks those blocks being overwritten permanently. If it's critical data, you should turn off the computer before the file sectors gets overwritten. Good luck!
Some restore utility:
http://www.ubuntugeek.com/recover-deleted-files-with-foremostscalpel-in-ubuntu.html
Forum where this was previously answered:
http://webcache.googleusercontent.com/search?q=cache:m4hiPw-_GekJ:ubuntuforums.org/archive/index.php/t-1134955.html+&cd=1&hl=en&ct=clnk&gl=us
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Due to problems with the windows installer 5 I must rename msi.dll for reinstallation. That's not possible in save mode/as administrator (access denied). Of course the service is stopped. Any hints?
Edit: My problem is that I can't install msi files anymore. Everytime after some dialogs I get an error message that the corresponding msi file can't be read. I have tried any infos I found in the www universe and lost a lot of time already. E. g. I replaced the registry settings, used sfc /scannow without success.
In Windows 7 there is no dllcache, so I really don't know what is preventing renaming.
My problem is that I can't install msi files anymore. Everytime after some dialogs
I get an error message that the corresponding msi file can't be read
This sounds a little bit strange. If you see MSI dialogs and the install fails when you kick it off there must be something else wrong. I assume you have, but have you verified that the problem exists with multiple MSI files? Try with a fresh MSI file, preferably one that you downloaded fresh from the Internet. Try to run from the local disk and from a network disk.
Have you enabled logging for the install? Try to do so with flush to log enabled (the ! character enables continuous flushing to log so that an msiexec.exe crash doesn't leave an empty log file):
msiexec.exe /i C:\Path\Your.msi /L*vx! C:\Your.log
See msifaq.com for more details (logging faq entry). Search for "value 3" in the log file to find errors as explained by Rob Mensching (Wix & Orca author).
Also try to disable any anti virus software and / or desktop security that may be interferring with the file extraction from the MSI's cab file. Is there plenty of disk space? Are there any errors found during a disk scan?
Are you trying to revert to a previous version of Windows Installer? Here is some information: http://support.microsoft.com/?kbid=315346.
I suppose you could use system restore as well, but that would have other side effects.
What is the overall problem? Windows Installer 5 does not seem to introduce anything very controversial: http://msdn.microsoft.com/en-us/library/windows/desktop/dd408114(v=vs.85).aspx
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I used maven to download mahout and hadoop recently. Because I could not seem to do that without using sudo mvn commands, eclipse could not seem to be able to use anything I had downloaded (there were lots of errors like parents of things like POM.xml being permission denied etc.) and more recently than that I was trying out mahout (with local jars downloaded directly from one of apache's mirrors, not from maven) and although I could run the class the first time, I couldn't do it again because my eclipse instance could not overwrite the file I had already written.
These are just examples of times I feel it would have been good to be running eclipse as superuser by doing
sudo eclipse
Instead of just launching it normally. The only problem I can think of is that as root eclipse suggests you use the root/workspace, but is it ok to just tell it to use yourusername/workspace?
In general- no. It's tempting, but not very good practice to do all of your development as the superuser. If you're running Eclipse as root, then you're also launching Java processes as root when you run your software. (You could change your Java run settings to sudo back to a regular user before running, but I wouldn't recommend that as a solution).
In addition to being a security risk, you are also making it difficult to track down bugs if you want to distribute the software to others to run as non-root (e.g. doing root only things like reading a protected file or using a well known port might work for you, but not for the average user).
I recommend finding the files that are causing issues and doing chmod o+r on them.
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SET UP:
I have OS X Lion 10.7.2 installed (not upgraded)
I bought the laptop (no software upgrade)
I have Version 4.2 (4D199) installed
My .bash_profile says the following:
export PATH="/usr/local/bin:/usr/local/sbin:/usr/local/mysql/bin:$PATH"
export PATH="$HOME/.rbenv/bin:$PATH"
When I type 'which psql' I get:
/usr/bin/psql
I have read this post on fixing the postresql Repairing Postgresql after upgrading to OSX 10.7 Lion and in this article it says that the when you type which psql you should be getting:
usr/local/bin/psql
I'm not getting it. What am I doing wrong?
UPDATE - FOR ANYONE
If anyone has the same set up as me do the following: Read this link https://plus.google.com/114301087219148980063/posts/VHmzi63jCJK I have copied and pasted what this person has wrote:
If you've installed or upgraded to Lion, you probably noticed that it now comes with a partial PostgreSQL 9.0.4 installation. Replacing shoddy MySQL with proper beardy Unix database software is no doubt a good thing, but you will quickly notice that the actual PostgreSQL server is missing, as it's part of the "server" version of Lion and not included in the regular flavor. So how do you get your PostgreSQL development server back?
Do not buy Lion Server http://itunes.apple.com/gb/app/os-x-lion-server/id444376097?mt=12. For £35 this should get you the official build of the server part of PostgreSQL, along with a lot of other stuff you most likely don't need. Save the cash and the diskspace.
Do not install the official PostgreSQL Mac package from EnterpriseDB http://www.enterprisedb.com/products-services-training/pgdownload. It's nice of them to provide one, but it's currently not working with Lion (minor user creation issues - although there is a workaround).
Do not Build from source http://cambhlumbulunk.blogspot.com/2011/07/os-x-lion-2-postgresql-as-default.html. This will work, but leave you with a clutter of files in /usr/local that conflict with system files unless you're taking special care.
Do brew install postgresql. Yes, this is almost the same as 3., but the result can be easily removed or updated later. Plus you get nice setup instructions at the end about how to create a database and launch postgres at login. Homebrew Link will also help you set up your environment so that things that require PostgreSQL headers and includes to build (like psycopg2) can find them without any messing around.
FINAL NOTE:
You must have brew installed first.
After you have installed brew then you can install postgresql brew install postgresql
The installation provides EXCELLENT notes for creating your initial DB and starting/stop PostgresSQL for OS X Lion. Save the notes and do the initial create DB
Once you have at this point you can create a db. i.e. psql -d stuff
For the longest time I kept wondering why the initial OS X Lion PostgreSQL was not working and it comes down to it's missing the server version. Anyone else banging their heads on this I hope this reference material helps.
*.bash_profile* is read on login (if you're using bash as your login shell or if you force its execution with the --login option).
Did you try to log off and on after you've modified the initialization file (*.bash_profile* will not be read if you just open a new terminal window)?
You may add the path settings to your .bashrc file too (it's read whenever an interactive shell is spawned).
Did you check if psql is actually available in /usr/local/bin ?