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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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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175 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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820 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? ...
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58 views

Pg_restore table size differences

What would account for the difference in table sizes between one PostgreSQL database and another restored from its dump file? On an Ubuntu 12.04 host, I'm running PostgreSQL 9.1, and I dumped my ...
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3answers
1k views

Issues installing MySQL server on Ubuntu 13.04

I'm currently trying to install a MySQL server on my Ubuntu 13.04 machine. The problem is, when I try to install it, I get error messages indicating that not all packages could be downloaded. When I ...
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2k views

restore compressed dump query in postgresql asks password [closed]

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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88 views

MySQL replication backup

How to take MySQL Master-Master and Master-Slave replication backup?. I have setup Master-Master replication with a separate slave for each master on Ubuntu. What happens if, I issue or schedule ...
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814 views

Why can I not start mysql server on ubuntu after change the innodb_flush_log_at_trx_commit value to be 2?

Why can I not start mysql server on ubuntu after change the innodb_flush_log_at_trx_commit value to be 2 ? updated to answer the 3 questions: mysql> show variables like 'version%'; ...
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2answers
7k views

How do I allow remote mysql access to all users?

I have setup a mysql server on unbuntu. The server hosts websites for my various clients. Hence, I want all of them(and any new clients) to have remote access to the mysql server. How do I configure ...
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3answers
3k views

How do I install postgresql in Ubuntu?

I'm following these instructions, however I can only get to step 17.2. Despite installing postgresql successfully via the sudo apt-get install postgresql command, upon running initdb -D ...
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1answer
423 views

MongoDB shell version error (Server has startup warnings)

I installed MongoDB under Ubuntu server and when inter to MongoDB shell i got this error and warnings. MongoDB shell version: 2.4.7 connecting to: test Server has startup warnings: Sun Oct 27 ...
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1answer
154 views

MongoDB service not working after upgrade to Ubuntu 15.04

I have recently upgraded my Ubuntu from 14.10 to 15.04. All features seems to be working fine except MongoDB. It is not controllable from service as we do normally in Ubuntu. sudo service mongodb ...
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1answer
167 views

After upgrade from 9.1 to 9.3, commands still point to 9.1

Upgraded from 9.1 to 9.3 on my Ubuntu 12.04 server. Everything worked great but running commands like 'createdb' still runs them from the 9.1 path. /usr/lib/postgresql/9.1/bin/createdb: unrecognized ...
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1answer
383 views

Upgrading MariaDB Galera cluster from 5.5 to 10.0 - rolling upgrade possible?

I've had a good search around and cannot find much on the topic. We want to upgrade our live MariaDB 5.5 Galera cluster to the MariaDB 10.0 branch, ideally without any downtime. We installed ...
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1answer
924 views

changed password for postgres login in pgAdmin, now can't connect to server

I was trying to use pg_dump to script out a database and in the process I used pgAdmin to change the password for the postgres user. I realize (now) that changing that password was a bad idea. But now ...
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2answers
1k views

Difficulty with Postgis extension on Ubuntu 14.04

I have a updated Ubuntu 14.04 running postgresql 9.3 (installed using the tutorial from https://wiki.postgresql.org/wiki/Apt). When I access my database through pgadmin and go to the console and ...
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1answer
152 views

CentOS and Ubuntu differences with information_schema

I have a Vagrant VM running CentOS 6.5. My localhost is Ubuntu 12.04, both running MySQL. I have the exact same database on both (structured exactly the same, different testing seed data in both). ...
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1answer
1k views

Oracle 12c on Ubuntu 12.04

I just installed oracle databse 12c on an ubuntu 12.04, i followed this tutorial ...
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1answer
151 views

Ubuntu / MySQL - How to choose from the various downloads?

I have Ubuntu 12.04.2 LTS. I would like install MySQL 5.5.29. So I go to the MySQL 5.5 archive page http://downloads.mysql.com/archives.php?p=mysql-5.5&o=other and scroll down to section 5.5.29 ...
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2answers
419 views

MySQL upgrade on Ubuntu - any heads ups?

I am needing to upgrade MySQL on Ubuntu, it is a production server and naturally cautious. My many googles look to be essentially saying that I need to : Backup my current mysql database and ...
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1answer
42 views

Install PostgreSQL using source code or using apt-get?

I want to install PostgreSQL on a server that runs Ubuntu 14.04.2 LTS. I understand that I have two options: 1) Install PostgreSQL using the source code distribution e.g., ...
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1answer
26 views

How to handle user with no password in postgresql

I installed postgresql but it's asking me for passwords that I never had and never entered. There is a postgres ubuntu user and a database user named moodle. Neither of these were created with a ...
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1answer
38 views

how to check and list all the files related to mongodb in ubuntu? I am looking for config files, password informations for mongodb [closed]

I installed the mongodb package in ubuntu using apt following the instructions on http://docs.mongodb.org/manual/tutorial/install-mongodb-on-ubuntu/. I know that binaries are in /usr/bin/, and so on. ...
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1answer
179 views

odbc connection from windows machine to mysql server running on ubuntu?

I was able to install mysql server on an ubuntu machine and set up a test data base, created a user and granted that user access to the database. I also changed the binding address to the IP of the ...
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1answer
718 views

Error: /var/lib/postgresql/9.3/main is not accessible or does not exist

I have a PostgreSQL db that was running on my server. I tried to do a db_dump and got a weird error message. I eventually thought I would just restart PostgreSQL. However its now stopped and won't ...
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2answers
507 views

starting pgbouncer on startup

I installed pgbouncer and configured it and it starts only via using this command pgbouncer /etc/pgbouncer/pgbouncer.ini however using service pgbouncer start it dose not start. I then set up ...
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1answer
1k views

How to resolve “Error log file size is increasing in mysql 5.5” issue w/o restarting mysql

I have an Ubuntu server with MySQL 5.5 installed. In /var/lib/mysql a .err file is kept on updating with these warnings only: [Warning] IP address '234.22.11.221' could not be resolved: Temporary ...
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3answers
206 views

Large RAM use after import database - ubuntu server

My new VPS has 4GB of RAM. Before importing database system use about 1.2 GB of RAM. When I import into the database, using 250 MB SQL file, 25000 tables use of RAM goes to 97%, htop showing 3302 mb ...
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1answer
252 views

Connection with SQL*Plus to Oracle

I've installed Oracle Database Express 10g on Ubuntu, but the following error occures when I try to connect to sql plus using the sysdba as username and it's password which I gave during installation ...
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1answer
105 views

multiple requests shut down mysql

I have some problems with my mysql database. I configured a server with the database and other services (apache, php) and put run multiple applications. There are two problems. Every day at the ...
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1answer
819 views

Oracle 11g install problem on Ubuntu

I ran the runInstaller script in the root dir of the extracted zip files. After some pages of the graphical installer it sent me to run /tmp/CVU_11.2.0.1.0_macbook/runfixup.sh as root. It gave me ...
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1answer
2k views

Howto disable Postgres listening on TCP?

Simply to avoid many problems in the first place I do not want my postgres server program to accept/listen to anything from any network (i.e. TCP/IP 4/6) connections. My setup is a Postgres 9.1 on ...
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1answer
7k views

mysql - Access denied for user 'user'@'localhost' (using password: NO)

I'm trying to fix the infamous "Access denied" error, but I don't understand why my fix doesn't work. Can someone please help me? EDIT: This is the sequence of steps I took to fix the problem. It is ...
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1answer
1k views

Mysql update table using ubuntu terminal

I have a CSV file that has 2 columns Name Email I have a table in my database that has the same columns + some extra columns. Now I would like to update my db table using that csv file. I mean ...
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1answer
101 views

Cant get postgresql running on ubuntu 12.04

I ran sudo apt-get install postgresql on ubuntu 12.04. I didnt get a postgresql.config, instead I got a postgresql.config.sample and pg_hba.conf.sample. I renamed these (they installed in ...
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1answer
576 views

upgrade mysql 5.1 to 5.5 on Ubuntu 11.10

I currently have mysql server 5.1 installed via apt-get on my production Ubuntu 11.10 server root@Ubuntu-1110-oneiric-64-minimal$ dpkg --get-selections | grep sql-server mysql-server ...
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2answers
279 views

Installing PostgreSQL 9.2 and PostGIS 2.0 on Ubuntu 12

At the current moment, March 4th 2013, can PostGIS2.0 be install with PostgreSQL 9.2? I checked their website and to my understanding it is not possible... I hope that's not the case. Can anyone ...
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1answer
1k views

libreadline.so.6

when I was installing PostgreSQL from source code I had to install the libreadline.so.6 library. From that moment I can't update my kubuntu system. The error is: Setting up ubuntu-keyring ...
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1answer
2k views

MySql 5.5 in ubuntu repository

Sorry for duplicate question. I am looking for the best way to install mysql 5.5 on ubuntu. So far, there are few options: Installing from tar.gz Installing from PPA. Alien on RPM. All of them ...
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1answer
16 views

sqlplus not connecting to Oracle XE 11g

I installed Oracle XE 11g on my Ubuntu in vmware fusion. The oracle installation is all went fine but I am not able to connect the oracle database using sqlplus. I am getting this exception: $ ...
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1answer
29 views

MySQL on Ubuntu consuming almost all RAM

I've been having an issue with MySQL crashing randomly, apparently as a result of not having enough available memory (as discussed here: ...
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1answer
23 views

Ubuntu broken need to recover mysql db

With a recent Ubuntu upgrade it has broken my system. I now only have access to the filesystem through a live CD. I had a MySQL database on the system with many objects and views I would hate to lose. ...
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0answers
96 views

Mongodb 3.0.1 in ubuntu starts but status, stop or restart show 'mongo stop/waiting'

I am relatively new to Mongo and have installed 3.0.1 on a Digital Ocean droplet (Ubuntu 14.04 LTS). The database starts without problems but I am unable to 'sudo service mongod [stop/restart/status]' ...
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2answers
44 views

Slow database drop in mysql

Just installed a new 24 core server and it is noticeably slower when doing truncates and drops. Example: $ mysql -u root lmcdental_test2 Reading table information for completion of table and column ...
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42 views

what is the password to user mongodb when mongodb is installed in ubuntu?

When I installed mongodb in ubuntu, user mongodb and group mongodb are created in /etc/passwd and /etc/group. But I have no idea of the password to these user and group. I have to run mongod as root ...
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0answers
22 views

How do I alter my role to be a superuser?

I'm working my way through the steps in this slide to configure Postgresql & PostGIS. I configured my user role as directed on this slide. Note, the new role should not be a superuser. That ...
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0answers
20 views

MySQL by default autostarts on Ubuntu Linux?

I installed MySQL server on Ubuntu Linux 14.04 LTS following instructions at https://www.digitalocean.com/community/tutorials/how-to-install-linux-apache-mysql-php-lamp-stack-on-ubuntu. The console ...
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0answers
139 views

Galera: WSREP: gcs connect failed: Socket type not supported

I am having a problem when trying to start the 2nd and 3th nodes. The node number 1 has started ok with no problem: I use the same configuration file for galena.cnf and my.cnf : change the ...
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0answers
20 views

Should I install hadoop on a single node

I just bought a desktop computer with 16GB RAM and 1TB drive, i7-quad core. I will be partitioning off 800GB for Ubuntu so I can do some data science type tasks. Is there any advantage to installing ...