Question
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
- Posted on June 18, 2019
- MySQL
Asked by ramanakarasarma
ramana_sharma@ramana:~$ mysql --version mysql Ver 14.14 Distrib 5.7.26, for Linux (x86_64) using EditLine wrapper ramana_sharma@ramana:~$ mysql -uroot -proot0 mysql: [Warning] Using a password on the command line interface can be insecure. ERROR 2002 (HY000): Can’t connect to local MySQL server through socket ‘/var/run/mysqld/mysqld.sock’ (2) ramana_sharma@ramana:~$ mysql -u root -p Enter password: ERROR 2002 (HY000): Can’t connect to local MySQL server through socket ‘/var/run/mysqld/mysqld.sock’ (2) ramana_sharma@ramana:~$ services mysql start No command ‘services’ found, did you mean: Command ‘service’ from package ‘init-system-helpers’ (main) services: command not found ramana_sharma@ramana:~$ /etc/init.d/mysql start bash: /etc/init.d/mysql: No such file or directory ramana_sharma@ramana:~$ #/usr/sbin/mysqld --defaults-file=/etc/mysql/my.cnf --basedir=/usr --datadir=/var/lib/mysql --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/run/mysqld/mysqld.sock ramana_sharma@ramana:~$ /etc/init.d/mysql start bash: /etc/init.d/mysql: No such file or directory ramana_sharma@ramana:~$ sudo service mysql restart [sudo] password for ramana_sharma: Failed to restart mysql.service: Unit mysql.service not found. ramana_sharma@ramana:~$ sudo nano /etc/mysql/my.cnf ramana_sharma@ramana:~$ systemctl enable mysql Failed to execute operation: No such file or directory
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Can you try to examine the server logs in order to track down more detailed information bout the issue?
On Ubuntu systems, the default location for MySQL is
/var/log/mysql/error.logIn many cases, the error logs are most easily read with the less program, a command line utility that allows you to view files but not edit them:If MySQL isn’t behaving as expected, you can obtain more information about the source of the trouble by running this command and diagnosing the error based on the log’s contents.
You can also use the
journalctlcommandhttps://www.digitalocean.com/community/tutorials/how-to-use-journalctl-to-view-and-manipulate-systemd-logs
The
innodb_force_recoveryis added to themy.cnffile in case of InnoDB corruption, but you need to use that as a last resort option.Regards
mysql -h 127.0.0.1 -P 3306 -u root -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 12 Server version: 8.0.16 MySQL Community Server - GPL
Copyright © 2000, 2019, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners.
Type ‘help;’ or ‘\h’ for help. Type ‘\c’ to clear the current input statement.
mysql> show databases; ±-------------------+ | Database | ±-------------------+ | information_schema | | kataragamaKiosk | | mysql | | performance_schema | | sys | ±-------------------+ 5 rows in set (0.63 sec)
mysql>
Looks like mysql-server is running correctly then, so don’t worry about reinstalling it. Follow my later steps on checking the configuration files are correct :)
- Matt.
Hi there @ramanakarasarma,
It sounds like possibly you only have the mysql client installed and not the server:
This should be able to be solved by installing mysql-server, so make sure that you have installed the mysql-server, not the mysql-client or something else.
The error you are seeing means that the file /var/run/mysqld/mysqld.sock doesn’t appear to exist, if you didn’t install mysql-server, then the file would not exist.
You should be able to quickly verify if the mysql server is running locally by doing the following two things:
First, attempt to login to the server with the localhost IP and specific mysql port:
mysql -h 127.0.0.1 -P 3306 -u root -p <database>You can also use telnet to see if anything is being served locally on the mysql port at all:
telnet 127.0.0.1 3306If those don’t work, it is very likely that mysql-server isn’t installed or running. You can install it by using
sudo apt-get install mysql-serveror similar depending on the linux distro you are using.However, if the mysql-server is already installed and is running, then you need to check the config files to ensure they are looking for the right sock file:
In
/etc/my.cnf, the socket file may be configured to use/tmp/mysql.sockor similar, but in the/etc/mysql/my.cnffile, the socket file may be set to/var/run/mysqld/mysqld.sock.So you may also be able to resolve this by removing or renaming
/etc/mysql/my.cnf, which will then let mysql use/etc/my.cnfinstead.Hope that helps! - Matt.
thanks for kind reply but when i install mysql server i got the following error please help this
ramana_sharma@ramana:~$ sudo apt-get install mysql-server [sudo] password for ramana_sharma: Reading package lists… Done Building dependency tree
Reading state information… Done mysql-server is already the newest version (8.0.16-2ubuntu16.04). 0 upgraded, 0 newly installed, 0 to remove and 194 not upgraded. 6 not fully installed or removed. Need to get 0 B/1,082 kB of archives. After this operation, 0 B of additional disk space will be used. Do you want to continue? [Y/n] Y Setting up mysql-common (8.0.16-2ubuntu16.04) … update-alternatives: error: alternative path /etc/mysql/my.cnf.fallback doesn’t exist dpkg: error processing package mysql-common (–configure): subprocess installed post-installation script returned error exit status 2 dpkg: dependency problems prevent configuration of mysql-community-client: mysql-community-client depends on mysql-common (>= 8.0.16-2ubuntu16.04); however: Package mysql-common is not configured yet. Version of mysql-common on system, provided by mysql-common:amd64, is <none>.
dpkg: error processing package mysql-community-client (–configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of mysql-client: mysql-client depends on mysql-community-client (= 8.0.16-2ubuntu16.04); however: Package mysql-community-client is not configured yet.
dpkg: error processing package mysql-client (–configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of mysql-community-server: mysql-community-server depends on mysql-common (>= 8.0.16-2ubuntu16.04); however: Package mysql-common is not configured yet. Version of mysql-common on system, provided by mysql-common:amd64, is <none>. mysql-community-sNo apport report written because the error message indicates its a followup error from a previous failure. No apport report written because the error message indicates its a followup error from a previous failure. No apport report written because MaxReports is reached already No apport report written because MaxReports is reached already No apport report written because MaxReports is reached already erver depends on mysql-client (= 8.0.16-2ubuntu16.04); however: Package mysql-client is not configured yet.
dpkg: error processing package mysql-community-server (–configure): dependency problems - leaving unconfigured dpkg: error processing package gettext (–configure): package is in a very bad inconsistent state; you should reinstall it before attempting configuration dpkg: dependency problems prevent configuration of mysql-server: mysql-server depends on mysql-community-server (= 8.0.16-2ubuntu16.04); however: Package mysql-community-server is not configured yet.
dpkg: error processing package mysql-server (–configure): dependency problems - leaving unconfigured Errors were encountered while processing: mysql-common mysql-community-client mysql-client mysql-community-server gettext mysql-server E: Sub-process /usr/bin/dpkg returned an error code (1)
Hi @ramanakarasarma,
Oh dear, not great!
Could you connect to the mysql server using
mysql -h 127.0.0.1 -P 3306 -u root -p <database>or did that fail?You might be able to convince mysql-server to reinstall fully by using
sudo apt-get install --reinstall mysql-server.- Matt.
sudo apt-get install --reinstall mysql-server Reading package lists… Done Building dependency tree
Reading state information… Done 0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 194 not upgraded. 6 not fully installed or removed. Need to get 0 B/1,082 kB of archives. After this operation, 0 B of additional disk space will be used. E: Internal Error, No file name for mysql-server:amd64
Replied to your answer with the successful connection to the mysql server :)
- Matt.
if I run this command, what will happen to the data files? Will they be replaced or not?
sudo apt-get install --reinstall mysql-serverHello,
I had the same error which actually happened because of a corrupted installation (disk got to 100% while installing, running on a Raspberry with Raspbian)
This has solved my problem, thanks!