Questions tagged [mysql]

An open-source, relational database management system.

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38
votes
1answer
75k views

Where does MySQL store its databases on Debian?

Our system crashed and we're trying to recover our data. The disc is fine, but the OS is gone, so I'm trying to get at the actual MySQL database files. Does anybody know where to look for them in a ...
25
votes
1answer
63k views

Anyone know a good gui to MariaDB? [closed]

I'm using MariaDB instead of MySQL in Slackware 14.1, and I need a graphic manager like MySQL Workbench. Can anyone suggest me something? I tried using MySQL WorkBench but it could not connected with ...
19
votes
3answers
19k views

Get a progress indicator when importing MySQL databases

I often import MySQL databases, and this can take a while. There is no progress indicator whatsoever. Can one be shown, somehow? Either records imported, MB imported, or tables imported... anything is ...
16
votes
3answers
28k views

How to pass password to mysql command line

I have MySQL password saved on a file foo.php, for example P455w0rd, when I try to use it: $ cat foo.php | grep '$dbpwd=' | cut -d '"' -f 2 | mysql -U root -p mydb -h friendserver Enter password: (...
16
votes
2answers
6k views

Will my MySQL query continue to run even if my ssh connection drops?

I've connected to a server over SSH and logged in to mysql, and asked it to run a query (the results of which are dumped into a CSV) that could take well over an hour. Although I have instructed my ...
15
votes
2answers
21k views

Installing mysql-server in vagrant bootstrap shell script (how to skip setup?)

I did try to install mysql-server on my Vagrant Ubuntu 12.04 LTS virtual machine. When I did so, the setup auto-starts. I can see this in the Vagrant output: While not mandatory, it is highly ...
14
votes
1answer
1k views

Why does piping to 'tail' change the contents of a line?

When I view the result of a SELECT with MySQL Workbench, it's correct with one single \ max@host 10:13:58: ~$ mysql -h db-master.domain.local -uuser -ppw db -e ' > SELECT > ...
13
votes
8answers
13k views

Encrypt a password the same way mysql does

I've created a user ... but forgotten the password mysql> create user 'blayo'@'%' identified by 'right'; Which Linux command line tool can encrypt the password the same way mysql 5.5 does ? mysql> ...
13
votes
2answers
34k views

How can I completely reinstall mysql?

I had to reboot in the middle of a large data import. I only have one mysql database, which has now been corrupted. How can I completely remove mysql and reinstall it? I've tried apt-get purge mysql-...
13
votes
3answers
41k views

How can I upgrade MySQL in Debian using apt-get?

I'm using the Turnkey Linux virtual machine. The version of Debian in there is apparently on the "Wheezy" upgrade path (if that's what you call it). I'm not completely comfortable with Linux, as you ...
12
votes
4answers
55k views

Turn off --skip-grant-tables in MySQL

I'm pretty new to using Linux but am setting up my MySQL databases on an Amazon ec2 instance. I followed some directions I found about resetting the user login pass by using the --skip-grant-tables ...
12
votes
5answers
32k views

How to change MySQL 'root' password using MySQL v5.7?

Current Environment : mysql> show variables like "%version%"; +-------------------------+------------------------------+ | Variable_name | Value | +---------------...
12
votes
4answers
39k views

cronjob for automatic DB backup to date prefixed file

I am using the latest Linux Mint. I was wondering if it's possible to create a special cronjob for a database backup. In my /etc/cronjob file I have the following code: # Minute Hour Day of ...
11
votes
1answer
8k views

OOM Killer - killed MySQL server

On one of our MySQL master, OOM Killer got invoked and killed MySQL server which lead to big outage. Following is the kernel log: [2006013.230723] mysqld invoked oom-killer: gfp_mask=0x201da, order=0,...
11
votes
4answers
20k views

MySQL max_open_files more than 1024

While starting MariaDB I got [Warning] Could not increase number of max_open_files to more than 1024 (request: 4607) $ sudo systemctl status mysqld ● mysqld.service - MariaDB database server Loaded:...
11
votes
1answer
25k views

MySQL Workbench warning when connecting to MariaDB

When using MySQL Workbench 6.3 on Kubuntu 15.10 and MariaDB Server version: 10.0.22-MariaDB-0ubuntu0.15.10.1 (Ubuntu), I get the following warning. Is this expected? Incompatible/nonstandard ...
11
votes
2answers
5k views

FreeBSD: “Too many open files” but should be able to open another 160,000 files

I have a FreeBSD 8 system running ZFS, with a MySQL 5.5 server which is about 355GB and projected to grow to be a couple of Terabytes. MySQL is triggering errors about "Too many open files" on /etc/...
10
votes
2answers
17k views

High IO wait - How to determine the root cause?

I have a MySQL instance on two dedicated servers. One for the production, the other for the test platform. The 2 servers are pretty the same, the only difference is the RAID controller and the ...
9
votes
1answer
15k views

How can I determine the connection method used by a MySQL client?

When using a MySQL client (e.g. mysql) how can I determine whether it connected to the server using a Unix socket file or by using TCP/IP?
9
votes
3answers
22k views

Can I copy a MySQL database by copying the files? What do the files contain exactly?

I am using MySQL database and using an Ubuntu Linux machine. My database named db_test , I notice that under path /var/lib/mysql/db_test ,there are files suffix with .frm, .MYD, .MYI like following: ...
9
votes
2answers
734 views

MySQL gets killed by OS every 25 days or so

About 4 months ago we migrated from MS SQL Server to MySQL 5.5. Since then we have been experiencing an issue once approximately ever 25 days since where CentOS runs out of memory and as a result it ...
8
votes
5answers
25k views

Suppress warning messages from MySQL in shell script but allow errors

My log files are getting dumped with following message while running shell scripts using some underlying MySQL commands. Here is the message: "Warning: Using a password on the command line ...
8
votes
1answer
12k views

start mysql server at boot for debian

I am using Debian Etch and I have following this and tried to write a script like this to auto start mysql server at boot: #! /bin/sh # /etc/init.d/blah # # Some things that run always sudo /etc/...
8
votes
2answers
8k views

High iowait while the wMB/s is low

I was indexing a MySQL table. It makes a high load on that computer. It seems due to a high iowait. But it also shows that the wMB/s is only 2.87. Isn't even a common SATA HDD able to handle more ...
8
votes
1answer
19k views

Permission denied writing to mysql log

I am just testing out a new Ubuntu (Vivid 15.04) install on Vagrant, and getting problems with mysql and logging to a custom location. In /var/log/syslog I get /usr/bin/mysqld_safe: cannot create /...
8
votes
1answer
12k views

How to configure the MySQL APT repo on Ubuntu, on a non-interactive shell?

I want to install MySQL 5.7 on Travis CI, which runs Ubuntu 12 virtual machines. I'm willing to use the official MySQL APT repo: wget http://dev.mysql.com/get/mysql-apt-config_0.2.1-1ubuntu12.04_all....
7
votes
7answers
21k views

How to install MySQL Workbench on Fedora 21

Is there an easy way to install MySQL Workbench on Fedora 21? I could not find a RPM package and failed at compiling it from source because I am using MariaDB and therefore was unable to install ...
7
votes
5answers
4k views

Fedora 16 strange /tmp permissions: mysqld will not start

I installed mysql on a brand-new Fedora 16 server and it would not start. This is the line from the log file (^G and all): ^G/usr/libexec/mysqld: Can't create/write to file '/tmp/ibNPyIlu' (Errcode: ...
7
votes
3answers
8k views

MySQL Linux Client Timeout/Keepalive

Is there a way to set a keepalive in the command-line MySQL client on Linux? Our network recently moved to a VLAN setup, and our systems department no longer has control of the firewall. The powers-...
7
votes
2answers
6k views

SSH tunnel via MySQL Workbench

my new production server is only visible via ssh double tunnel. I can reach targetHost over Ubuntu's 14.04 console simply executing command ssh targetHost and than executing mysql cli on remote ...
6
votes
2answers
28k views

df command not showing correct values

This is a RHEL server, I'm running a MySQL server on it, the database and log files (however, logging is disabled) are located on the /srv directory where plenty of space is available. Recently I had ...
6
votes
2answers
25k views

PHP on centos 6 not working

I have installed PHP, MySQL, Apache on CentOS 6, now I have restarted the Apache and mysql, to test PHP I have created a index.php on /var/www/html/test/ now once I go to localhost/test/index.php then ...
6
votes
2answers
5k views

Debian 9: After upgrade from 8, MySQL (MariaDB) does no longer work

I just upgraded from Debian 8 to 9. Apparently, it breaks everything database related. I now can't start MySQL, the error is: ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/...
6
votes
6answers
29k views

MariaDB - dependency problems - leaving unconfigured

I have tried to install ISPConfig3 on Debian Jessie 8.1, and it couldnt connect to mySQL (mariaDB 10.1). So I CTRL+C to kill the install and I tried to manually login to mySQL, but I failed. It was ...
6
votes
3answers
10k views

How do I capture a MySQL result set in a bash array?

I'm using bash shell on CentOS 7. I want to run a MySQL query from a shell script and iterate over each row of results. If there were 4 rows returned, I thought I could capture the four rows in an ...
6
votes
2answers
694 views

Back up MySQL server

I want to backup all databases, users and etc on our MySQL sever. I have come across the command mysqldump and believe I can use it like this? (Trying to backup a REMOTE server to our LOCAL machine) ...
6
votes
3answers
7k views

How to compress a mysql dump using 7z via a pipe?

I've been attempting to compress my mysqldump output via 7z using the pipe operator (I have seen this question, but its answer uses xz not 7z). This is what I have tried so far: mysqldump -u root -p ...
6
votes
2answers
5k views

Convert mysql count(*) to int in bash?

I'd like to execute this and check if count is 0, 1 or > 1 in bash. mysql -e "select count(*) from mydb.mydb;" The output is: +----------+ | count(*) | +----------+ | 0 | +----------+ I ...
6
votes
1answer
1k views

Cannot install phpmyadmin

I cannod install phpmyadmin. The installation process fails with the following error. I can normally log in to the mysql database. What should I do? Normally I would expect "(using password: Yes)". ...
6
votes
2answers
6k views

Apt-get hangs on “Setting up mysql-server-5.5 (5.5.44-0+deb8u1)”

I'm on Debian 8 (stable) (Linux zenbook 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt11-1 (2015-05-24) x86_64 GNU/Linux) and tried to apt-get update && apt-get upgrade yesterday. There was an ...
6
votes
4answers
27k views

install mysql - has no installation candidate

I used to install mysql 5.6 in this way.. But now.. # echo "deb http://repo.mysql.com/apt/debian/ $(lsb_release -sc) mysql-5.6" >> /etc/apt/sources.list && echo "deb-src http://repo....
6
votes
1answer
1k views

/etc/passwd sql with bash access

I just got a CentOS VPS and was reviewing the passwd file and saw this: mysql:x:498:499:MySQL server:/var/lib/mysql:/bin/bash Is bash necessary for mysql?
6
votes
1answer
2k views

Linux : Alternative of install_name_tool of MAC in CentOS

I am looking for alternative of install_name_tool of MAC in CentOS. Exactly I want to build MySQL on non default location. Also the shared libraries of the mysql binary should be on non default ...
6
votes
1answer
32k views

How can I fully remove a tablespace from MySQL? [closed]

I have a MySQL database called camera_main_live, which I administer using Adminer. It is, to all appearance, empty. So when I want to add some content, I begin by running this script (with Adminer set ...
6
votes
1answer
8k views

MySQL stop/waiting issues; “can't connect … through socket” [duplicate]

So this was my first time putting up a LAMP stack on a Bodhi machine (previously experience with WAMP, and LAMP on 10.04); I got Apache going, and a Drupal install begun, then I go to create a new ...
5
votes
6answers
4k views

Multiple ssh sessions in single command

I'm trying to copy a database from one server to another. I tried using the following command and it's getting tied up on entering the ssh passwords. If I put in one server's password, it complains ...
5
votes
3answers
9k views

MySQL Workbench Cannot start SSH tunnel manager

I don't know why this error is happening when I try to connect by MySQL Workbench. Cannot start SSH tunnel manager. I'm using slackware 14.1 and installed all dependencies.    
5
votes
3answers
10k views

MySQLdump via crontab - Pass --password=/hashed/password/file so I can use via crontab w/o using plain text password

So I'm setting up a WordPress backup guide/making a backup schedule for myself for real. I want to do MySQL dumps daily, but the command either requires -p then user input or --password="plain ...
5
votes
4answers
14k views

unable to launch mysqld in arch linux

I have recently installed Arch Linux x64 and I wanted to install the LAMP stack. Everything worked fine, until I arrived to the MySQL part that I installed but can't launch. The output of sudo ...
5
votes
3answers
9k views

Will yum remove mysql-server delete my databases?

My MySQL server has broken down, and I can't figure out why. Trying to do a yum reinstall I get this: Error: mysql-server conflicts with mysql-server I figure that's because the server already had ...