Ubuntu is a desktop and server operating system based on Debian GNU/Linux. Note that http://askubuntu.com is specifically dedicated to Ubuntu questions.

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Ubuntu Multiple MySQL instances and Apparmor

I am trying to set up multiple instances of MySQL on an Ubuntu dev machine and running into AppArmor problems. I get this error in the syslogs: kernel: [227631.776360] type=1400 ...
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1answer
324 views

MySQL Replication not working properly on Ubuntu Lucid Lynx Server

I have two Linux boxes. On the master following is the configuration file (my.cnf) log-bin = master-bin log-bin-index = master-bin.index binlog-do-db = test_db server-id = 1 master ...
2
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1answer
330 views

MongoDB Replica Set: Can't Add Member/Connect

I'm building a MongoDB replicaset w/ three Ubuntu 14 servers. I'm connected to the primary server and authenticated w/ userAdminAnyDatabase and clusterAdmin privileges. When I run ...
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0answers
2k views

Setting password for 9.3 PostgreSQL server

I currently have a 9.3 server running (on Ubuntu 14.04) with "trust" set as the authentification method in pg_hba.conf. How can I set the password again. In pgadmin the server currently doesn't allow ...
2
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1answer
113 views

Mongodb replica sets: why does my master server occupy more disk space than my slave?

I have two servers on my replica set. Let's call it the master and the slave, for the purpose of this discussion. The master was the original one, and the slave was replicated from that master. At ...
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2answers
1k views

pgpool replication not allowing md5 authentication

I have installed both pgpool and postgresql via apt. In pgpool.conf, I have made the changes necessary to use replication mode, as well as my two postgresql databases (currently all running on the ...
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4answers
2k views

PostgreSQL 9.3 on Ubuntu Server 12.04 v.s. MS SQL Server 2008 R2 on Windows 7 Ultima

I have searched many articles in Google about the performance of PostgreSQL vs MS SQL 2008 R2 and found that many of those articles say the performance of PostgreSQL is better than that of MSSQL 2008 ...
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1answer
857 views

Do I need to set tcpip_socket = true to allow remote connections to a postgresql database?

I am trying to enable remote connections to my postgresql 9.1 db running on ubuntu 12.04. This tutorial says to "set tcpip_socket to true" -- but it is for a centos server. I am on ubuntu. I ...
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2answers
1k views

Postgresql - Segmentation fault (core dumped)

I'm working on postgresql code (server side). I installed a version from source code following the official tutorial: http://www.postgresql.org/docs/8.4/interactive/install-short.html I did same ...
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2answers
702 views

Mysql master-master permission replication issue

I came to know it's safe to replicate mysql database to have the users and permissions replicated, from a post in ServerFault is-it-ok-to-replicate-mysql-db. I have setup master-master replication ...
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1answer
261 views

I have accidently deleted ibdata1 on an ubuntu server

I have accidently deleted the 'ibdata1' file on the server having innodb, Is there any way I can recover it? the mysql service has restarted since the deletion.
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1answer
138 views

Should my Postgres backup server be as beefy (IO, processor, RAM) as my master?

I've set up a Postgres database on a server with 2 CPU cores, 4GB of RAM and an SSD volume (on top of RAID 10 of course). This is our (sort-of) "beefy" production database server (I can easily add ...
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4answers
6k views

How to change the data directory on Postgresql 9.1 on Ubuntu

I am having a problem changing the data directory on postgresql 9.1 on ubuntu 13.04: I first did a: sudo pg_dropcluster --stop 9.1 main and then attempted to create a new one in the desired path: ...
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1answer
2k views

restore compressed dump query in postgresql asks password

I'm using ubuntu OS and I took backup using sudo -u postgres pg_dump dbname | gzip > filename.gz in the file path as... /home/administrator/Documents/DB_Backup# sudo -u postgres pg_dump dbname ...
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1answer
228 views

What happens to existing MySQL databases when I upgrade my Ubuntu distro?

I am in the midst of upgrading my Ubuntu distro from 10.4 to 12.4. Fearfully, it asked me for root password on MySQL when I was upgrading the distro. I used to have databases on that server, would ...
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1answer
228 views

Safely changing innodb_buffer_pool_size on MySQL replication master?

We have a MySQL server which is a replication master. We need to change the innodb_buffer_pool_size and innodb_flush_method to (hopefully) improve performance as the database has grown. What is the ...
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2answers
600 views

MySQL Synchronous Replication on Ubuntu 12.04 with DRBD

I have been looking around for some easy and open-source ways to handle database synchronous replication. DRDB on a Linux server seems to be one of the fastest and easiest methods to handle database ...
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2answers
2k views

PostgreSQL cannot start after replacing contents inside its Data folder

When recovering the Postgresql database from a hacked Ubuntu 12.04 server, I copied the data directory to another location, reinstalled the OS and PostgreSQL, stopped PostgreSQL service, removed the ...
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3answers
1k views

Ubuntu: upgrading postgresql 8.4 database cluster for use with 9.2 server

I have installed PG 9.2 on my machine. I have a database cluster that was created about a year ago, using initdb, using postgreSQL version 8.4. The (8.4) data cluster consumes several Gb and so its ...
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1answer
1k views

Postgresql: what to do about upgrading “main” cluster from 8.4 to 9.1 when a 9.1 “main” already exists?

I have an existing 8.4 cluster (named main) that I want to upgrade to 9.1. However, when I go to upgrade it, I get an error because 9.1 already has a cluster named main (apparently a default cluster ...
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2answers
126 views

Trying to create PostGIS database

I am trying to create a spatially enabled PostGIS database by following the PostGIS documentation. In the short version, i executed, createdb yourdatabase createlang plpgsql yourdatabase But I did ...
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1answer
4k views

How to set a specific directory location for individual MySQL database?

Is it possible to set each database in MySQL to use a separate datadir? I'm running a userdir development (sandbox) server and would like to put the MySQL data files for the database(s) for that user ...
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2answers
473 views

Moving MySQL database from UniServer to Ubuntu Server?

I have set up Ubuntu Server 11.10, and plan to host my website on it. Until this point I was using UniServer to host it in a portable fashion. Using the built in MySQL. This is fine, and through ...
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2answers
50 views

How to Permanently solve MySQL error 2002 (HY000)

I have a problem on my cloud server with 2GB of RAM and 40GB Hard Disk that's hosting a Wordpress website that receives around 1000-2000 hits a day. My problem is that MySQL is always crashing and my ...
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1answer
36 views

postgresql: accept subdomain wildcards?

I want to accept all db connections from servers with domain mydomain.com so that all subdomains like tiger.mydomain.com, venus.mydomain.com will have access to the postgresql server. I've read that ...
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1answer
170 views

Postgresql connection refused

I'm trying to remotely connect to my postgresql database. I have two virtual machines set up both running ubuntu 14.04. I am trying to connect to the second vm using the first vm using psql -h ...
1
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1answer
657 views

Difference between mongod and mongodb upstart jobs

I just noticed that there are two possible ways to start mongodb: service mongodb start (uses /etc/mongod.conf) service mongod start (uses /etc/mongodb.conf) Can someone tell me what's the ...
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1answer
144 views

Easiest way of shutting down a PostgreSQL server on Ubuntu

According to pg_lsclusters I have 2 servers running on Ubuntu 14.04: Ver Cluster Port Status Owner Data directory Log file 9.1 main 5432 online postgres ...
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1answer
2k views

Authentification failure for PostgreSQL server (9.3)

I can currently not connect to my Postgresql server (9.3) from pgadmin (Running on Ubuntu 14.04). The server according to pg_lsclusters is on port 5433. Ver Cluster Port Status Owner Data ...
1
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1answer
74 views

Which version of linux OS has support for MongoDB installation?

I would like to learn how to install MongoDB in my Windows machine. Currently I have a Windows 8 64 bit OS laptop and I installed MongoDB 64 version for Windows. My question is: which version of ...
1
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1answer
119 views

Authenticating to Oracle REST data services as admin

i'm working on an android app connected to a database, the database has more data than any tablet can handle, so after some research i found many solutions, most of them consisted of implementing a ...
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2answers
169 views

Questions since MySQL Startup

Have a weird question / (bug?) here. Using PHP My Admin I installed via apt-get on Ubuntu 13.10 Versions are as follows: Server version: 5.5.35-0ubuntu0.13.10.2 - (Ubuntu) Apache/2.4.6 (Ubuntu) ...
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2answers
294 views

Install MySQL on Ubuntu 12.0.4

This is my first time using Linux. I am trying to install MySQL 5.6.15 on an Ubuntu box. I download MySQL from their website and put it on a USB stick then plugged the stick into the box. How can I ...
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2answers
1k views

Can't restore mysqldump database backup in Ubuntu 12.04

I'm trying to restore a database backup created using mysqldump. If I do: $ mysqldump -u ROOT -p DATABASE_NAME < DATABASE.SQL the database remains empty, even though I get some screen output ...
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1answer
2k views

How to completely remove EnterpriseDB Installation of Postgresql on Ubuntu?

All, I'm trying to install/run PostgreSQL 9.3, but am receiving a multitude of errors which seem to point to a failed installation of postgresql from the enterpriseDB package. For example, trying to ...
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5answers
5k views

MySQL gives me:“Can't open and lock privilege tables: Table 'host' is read only”

I am facing problem restoring a MySQL database. My primary database was MySQL 5.1 and now I am trying to copy it to MySQL 5.5. The database was backed up by using Xtrabackup. I am using Ubuntu ...
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1answer
735 views

db2 LUW help for an oracle user : create database hangs without any output, but database got created

I am new to db2 but have worked on oracle before. Trying to create a database and it succeeds, but the session where I issued a database creation command hangs. I have installed db2 10.5 on a 64 bit ...
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1answer
3k views

Merge multiple tables in a database

I have a MySQL database with table names like 1,2,3... upto 1000 Each tables have 2000 rows and has the same structure. This is how all my 2000 table's structure look like id,url,title,content id ...
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2answers
551 views

MySQL+Web-App Performance Issues using different servers

We are having a performance issue with our MySQL servers that does not make any sense. I have read countless articles from many people (mostly Percona) and have made my.cnf tweaks. We have even manage ...
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1answer
5k views

MySQL my.cnf Optimization

We are an email marketing company and we recently switched our setup to MySQL. We need to configure MySQL (my.cnf) for extreme performance. We have tried to configure my.cnf but heavy queries got ...
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3answers
1k views

Ubuntu / MySQL / Percona XtraBackup gives error “sh: 1: xtrabackup_55: not found”

Hello I installed Ubuntu 12.04.2 LTS on a fresh box. This installed MySQL 5.5.29. I installed percona-xtrabackup-2.0.6-521.tar.gz, and moved the executables to /usr/bin/ But innobackupex is ...
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1answer
143 views

clusterdb stopped working for PostgreSQL database in Ubuntu 12.04 server

After a fresh PostgreSQL install (version 9.2) on my Ubuntu server 12.04, clusterdb utility stopped working. I used the same config files as I used with version 9.1. Below is the actual command: ...
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1answer
30 views

How can I remove references to tables after removing .frm files?

So I had a bunch of csv files in my /var/lib/mysql/imports directory for importing into mysql tables I had created. To clean up the folder I deleted all the files in the directory (incorrectly ...
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1answer
53 views

MongoDB installation Ubuntu 12.04 LTS errors

I need some help with my MongoDB installation on a clean, fresh Ubuntu 12.04 LTS server with no nonsense installed. I thought it would be a piece of cake, but I got some errors and the Ubuntu-forums ...
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0answers
21 views

Issue running MongoDb 3.0

Was original running MongoDb 2.4 on Ubuntu 13.10. Upgraded MongoDb to 2.6. Upgraded Ubuntu to 14.04. Upgraded MongoDb to 3.0. However everytime I issue "mongod --config /etc/mongodb.conf", I am ...
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3answers
116 views

How i can export just structure of mysql database

I use ubuntu 14.10 Phpmyadmin I have ''big'' mysql database, 900mb, I need just structure of this database, how i can export just database structure/empty database without remove data or download ...
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0answers
39 views

MySQL Memory & max_connections Performance Tuning

So, our site runs WordPress and in the past few days we have been getting tons of spam comments etc. I believe that we are becoming the victims of some kind of bot army that has been crashing our ...
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0answers
167 views

how do I debug postgresql 9.1 server terminating

my /var/log/postgresql/postgresql-9.1-main.log shows 2014-03-25 10:39:30 CET HINT: In a moment you should be able to reconnect to the database and repeat your command. 2014-03-25 10:39:30 CET LOG: ...
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0answers
742 views

PostgreSQL problems on Ubuntu 12.04

I'm having terrible problems with PostgreSQL initialization on my VPS. I followed several tutorials on this topic and nothing made my database server work. I followed these steps: sudo apt-get ...
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1answer
100 views

MySQL on Ubuntu 32bits vs 64bits

My web app server is running on Ubuntu 12.04 server 32bits. The mysql db is going to be installed on a different Ubuntu 12.04 server. Should I use 32 bits for the server on which mysql is or 64 bits? ...