Warning: mysql_connect(): Can't connect to local MySQL server through socket - mysql

My WordPress site ( http://steamboatperinatalconference.com ) just recently started going down and spitting this error
" Warning: mysql_connect(): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) in /var/www/html/wp-includes/wp-db.php on line 1568 "
I have checked the db password and its ok, also reset the instance and sql server and both are running, I'm able to connect to my database through mysqlworkbench.
Not sure why my website won't display if the database is up and running.
Any help is appreciated.

First kill the processes with:
sudo pkill mysql
and
sudo pkill mysqld
restart mysql
sudo service mysql restart
now you should be able to log in
mysql -u root -p

It turns out in order to fix the issue I was having I needed to run a sudo yum update on the AWS ec2 instance, after performing the update the page was back up and running

my.cnf (location of file /etc/mysql/ folder) configured with
socket=/var/lib/mysql/mysql.sock
check for MySQL is running with the following command:
mysqladmin -u root -p status
changing permission to MySQL folder. If you are working locally, you can try:
sudo chmod -R 755 /var/lib/mysql/

Related

While trying to reset root mysql password in ubuntu I get error while running 'sudo mysql -u root' command

I have run into a very common problem while setting up a lamp stack in ubuntu. The problem that I got into is, I try to log into phpmyadmin using 'root' as username and a password that I set during instillation, I don't know if the password is wrong or I forget or something else went wrong, any way I can't login. Now I search For the solution to reset the mysql password and I get the most suggested solution which is like below:
sudo /etc/init.d/mysql stop
sudo mysqld_safe --skip-grant-tables &
sudo mysql -u root
And during this third step I get the error like below:
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
And Now I am stuck here, And I cannot reset password: So Help me
In /etc/my.cnf, the socket file config may be /tmp/mysql.sock and in /etc/mysql/my.cnf the socket file config may be /var/run/mysqld/mysqld.sock.
So, remove or rename /etc/mysql/my.cnf, let MYSQL use /etc/my.cnf, then the problem may be solved.
For me stopping and starting mysql did not help ('sudo /etc/init.d/mysql stop', 'sudo /etc/init.d/mysql start')
Because I had to use the command to stop mysql:
sudo /etc/init.d/mysql stop
and then run other commands
sudo mysqld_safe --skip-grant-tables &
sudo mysql -u root
before starting mysql:
sudo /etc/init.d/mysql start
But simply restarting my system that is my laptop solved my problem.

MySQL error, missing sock, can still connect with everything except command line

I'm getting the following error when trying to connect to MySQL through the command line (Ubuntu 14.04)
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
Seems that the file /var/run/mysqld/mysqld.sock is missing. MySQL is still running
% sudo service mysql status
mysql start/running, process 42703
and I am able to connect with MySQLdb and sqlalchemy via Python and through MySQL Workbench and MySQL Pro. I was running a Python script and got the following error
(1053, 'Server shutdown in progress')
I restarted the script and everything ran like usual but since this point I have been unable to connect via command line. Not sure what happened or why the sock would disappear. I also ran
sudo find / -type s
and nothing related to MySQL is found.
UPDATE: Seems that someone uncommented bind-address = 127.0.0.1 (inside /etc/mysql/my.cnf), restarted the server, realized this was a mistake, put it back, and restarted. Would this remove the sock file?
Problem seems to be that multiple mysql processes are running. Try stopping mysql and mysqld processes followed by restarting mysql:
sudo pkill mysql
sudo pkill mysqld
sudo service mysql restart
now you should be able to log into mysql normally
mysql -u root -p
if it still doesn't work, and you're mysql database is local, try changing the bind-address from 127.0.0.1 to localhost before attempting to kill the processes like I showed you above.
Open up the configuration file:
sudo vim /etc/mysql/mysql.conf.d/mysqld.cnf
look for the line containg bind-address and change the line to
bind-address = localhost
save the file and exit
now kill the processes and restart mysql ( first 3 steps in the beginning of this comment).

Resetting MySQL password & missing mysqld.sock file

I am trying to run a local mysql server, on my own computer. I have lost the password that I initially set up. When I try to connect to mysql, I get the following error:
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
I have therefore tried these steps to reset my MySQL password, but the line
mysql -u root mysql
returns the same error message:
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
When running the command
mysqladmin -u root -p status
I get the following message:
error: 'Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)'
Check that mysqld is running and that the socket: '/var/run/mysqld/mysqld.sock' exists!
I have been checking and the file mentioned (/var/run/mysqld/mysqld.sock) doesn't actually exist. I am not sure what is causing this.
I have tried a couple of solutions online including this, this, this and this but none of this solutions worked for me. I would like to add that mysql-server is installed on my machine.
Any help appreciated. Please accept my apologies if there is any confusion to the above statements. I tried to explain what is happening as much as I can, but I am a beginner and I am clueless as to what is happenening there.
1) Stop the mysql demon process using this command :
sudo /etc/init.d/mysql stop
2) Start the mysqld demon process using the --skip-grant-tables option with this command
sudo /usr/sbin/mysqld --skip-grant-tables --skip-networking &
Because you are not checking user privs at this point, it's safest to
disable networking. In Dapper, /usr/bin/mysqld... did not work.
However, mysqld --skip-grant-tables did.
1) start the mysql client process using this command
mysql -u root
2) from the mysql prompt execute this command to be able to change any password
FLUSH PRIVILEGES;
3) Then reset/update your password
SET PASSWORD FOR root#'localhost' = PASSWORD('password');
4) If you have a mysql root account that can connect from everywhere, you should also do:
UPDATE mysql.user SET Password=PASSWORD('newpwd') WHERE User='root';
once have received a message indicating a successful query (one or more rows affected), flush privileges:
FLUSH PRIVILEGES;
Then stop the mysqld process and relaunch it with the classical way:
sudo /etc/init.d/mysql stop
sudo /etc/init.d/mysql start
This is borrowed from https://help.ubuntu.com/community/MysqlPasswordReset , you can check also another method to reset mysql password.
Looks like your MySQL server is not running at all.
Can you check it?
service mysql status
You need to try restart it and make sure that you can stop and start it using
service mysql stop
service mysql start
If you have any errors post them here please.
Reinstalling mysql-server worked for me. (I am using mysql 5.7)
sudo wget http://repo.mysql.com/mysql-apt-config_0.8.9-1_all.deb
sudo dpkg -i mysql-apt-config_0.8.9-1_all.deb
sudo apt-get update
sudo apt-get install mysql-server
mysql_secure_installation
first kill user
sudo pkill -u <user>
Then install mysql server
sudo apt install mysql-server
Configure it
sudo mysql_secure_installation
Enter into mysql shell
sudo mysql

Error connect to mysql server in ubuntu 12.04

I am trying to connect to mysql server in ubuntu 12.04 from terminal
using and password empty("")
mysql -u root -p
it throwing error
ERROR 2002 (HY000): Can't connect to mysql server through socket 'var/run/mysql/mysqld.sock'(2)
Though i am able to access database successfully from phpmyadmin and there i see there is no password for root in user user table in mysql database.
I am using xampp package
I think the error is the socket file. Where did you install your xampp?
Can you try this,
mysql -u root -p --socket=/opt/xampp/var/mysql/mysql.sock
where opt is your installation directory. Change opt to your installation directory.
edit:
Or if you don't want using socket parameter on your mysql command, you can try
ln -s /opt/xampp/var/mysql/mysql.sock /var/run/mysql/mysqld.sock
Thanks.
what i can guess about your problem:following
If your file my.cnf (usually in the /etc/mysql/ folder) is correctly configured with
socket=/var/lib/mysql/mysql.sock
you can check if mysql is running with the following command:
mysqladmin -u root -p status
try changing your permission to mysql folder. If you are working locally, you can try:
sudo chmod -R 755 /var/lib/mysql/
that solved it for me

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)

I installed LAMP on Ubuntu 12.04 LTS (Precise Pangolin) and then set root password on phpMyAdmin. I forgot the password and now I am unable to login. When I try to change password through terminal I get:
ERROR 2002 (HY000): Can't connect to local MySQL server through socket
'/var/run/mysqld/mysqld.sock' (2)
How can I fix this? I am unable to open LAMP, uninstall it or reinstall it.
I once had this problem and solved it by installing mysql-server, so make sure that you have installed the mysql-server, not the mysql-client or something else.
That error means the file /var/run/mysqld/mysqld.sock doesn't exists, if you didn't install mysql-server, then the file would not exist. So in that case, install it with
sudo apt-get install mysql-server
But if the mysql-server is already installed and is running, then you need to check the config files.
The config files are:
/etc/my.cnf
/etc/mysql/my.cnf
/var/lib/mysql/my.cnf
In /etc/my.cnf, the socket file config may be /tmp/mysql.sock and in /etc/mysql/my.cnf the socket file config may be /var/run/mysqld/mysqld.sock. So, remove or rename /etc/mysql/my.cnf, let mysql use /etc/my.cnf, then the problem may solved.
Try this:
mysql -h 127.0.0.1 -P 3306 -u root -p <database>
Also (to see if it's running):
telnet 127.0.0.1 3306
Probably it is just a misconfiguration in the my.cnf file, in /etc/somewhere (depending on the Linux distribution).
I am seeing all these answers, but none offer the option to reset the password and no accepted answer. The actual question being he forgot his password, so he needs to reset, not see if it's running or not (installed or not) as most of these answers imply.
To reset the password
Follow these steps (can be helpful if you really forget your password and you can try it anytime, even if you're not in the situation at the moment):
Stop mysql
sudo /etc/init.d/mysql stop
Or for other distribution versions:
sudo /etc/init.d/mysqld stop
Start MySQL in safe mode
sudo mysqld_safe --skip-grant-tables &
Log into MySQL using root
mysql -u root
Select the MySQL database to use
use mysql;
Reset the password
-- MySQL version < 5.7
update user set password=PASSWORD("mynewpassword") where User='root';
-- MySQL 5.7, mysql.user table "password" field -> "authentication_string"
update user set authentication_string=password('mynewpassword') where user='root';
Flush the privileges
flush privileges;
Restart the server
quit
Stop and start the server again
Ubuntu and Debian:
sudo /etc/init.d/mysql stop
...
sudo /etc/init.d/mysql start
On CentOS, Fedora, and RHEL:
sudo /etc/init.d/mysqld stop
...
sudo /etc/init.d/mysqld start
Login with a new password
mysql -u root -p
Type the new password and enjoy your server again like nothing happened
This was taken from Reset a MySQL root password.
I tried the following steps:
Log in as super user or use sudo
Open /etc/mysql/my.cnf using gedit
Find bind-address, and change its value to the database server host machine's IP address. For me, it was localhost or 127.0.0.1
Save and close the file.
Come back to terminal and execute sudo service mysql start
And it worked for me.
In my case it was that the disk was full and mysqld couldn't start anymore.
Try to restart mysql service.
> service mysql restart
or
> service mysql stop
> service mysql start
If it doesn't recognize stop command then it's definitely the disk space. You should make some space in the partition mysql is allocated or make the disk larger.
Check the disk space with
> df -h
I fixed this problem by executing the following command:
mysql.server start
And if you are on a mac and used brew to install mysql, simply use:
brew services start mysql
I had a similar problem. mysql wouldn't start:
sudo service mysql start
start: Job failed to start
If I disabled apparmor:
sudo aa-complain /etc/apparmor.d/*
the problem went away. The issue was that mysqld was trying to access /run/mysqld/mysqld.sock but the apparmor profile only gave permission to /var/run/mysqld/mysqld.sock (/var/run is symlinked to /run, so these are actually the same). Not sure why mysqld isn't using the var path since that's what's set in all the configuration files, but you can fix the problem by adding the following to /etc/apparmor.d/usr.sbin.mysqld
/run/mysqld/mysqld.pid rw,
/run/mysqld/mysqld.sock rw,
I solved this by killing the mysql process:
ps -ef | grep mysql
kill [the id]
And then I started the server again with:
sudo /etc/init.d/mysql restart
But start works as well:
sudo /etc/init.d/mysql start
Then I logged in as admin, and I was done.
Somehow the MySQL server process did not create the socket, or the client is looking for the socket in the wrong place.
My first suggestion would be to check if the MySQL server is running. Second suggestion might be, is the MySQL server running on another host? If so, add the -h <hostname> flag to your MySQL client in the terminal.
If MySQL is indeed running, and running locally, check your my.cnf file. There should be a line like
socket = /var/run/mysqld/mysqld.sock
See if that matches the socket location that you mentioned in your post.
From experience, I would say the most likely scenario is your MySQL server either is not running at all or is not running on the same host as where you run your MySQL client from the terminal.
I just experienced the same issue after I had to restart my production server. I am running Debian 8.1 (Jessie) on a DigitalOcean droplet.
This is what I did to resolve my issue:
Check if the file /var/run/mysqld/mysqld.sock exists. If it doesn't, manually create it by entering touch /var/run/mysqld/mysqld.sock (which is what I had to do).
So the MySQL process can use this file. Change ownership of said file by entering chown mysql /var/run/mysqld/mysqld.sock.
Once '2' has been done, restart the MySQL service by entering service mysql restart or /etc/init.d/mysql restart.
After going through the above steps, my issue was solved. I rarely have this issue, and there is probably a better way, so by all means provide constructive feedback if need be :).
Check the "bind-adress" parameter in my.cnf.
Else try with the command:
mysql -h 127.0.0.1 -P 3306 -u root -p
-h for host 127.0.0.1, that is, localhost
-P (notice -P as uppercase) for port 3306, that is, the default port for MySQL
Your mysql-server might not be running. Ensure it runs by typing mysql.server start into the terminal.
I think whenever you get the error
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock'
I will recommend first to check whether your mysql daemon is running... Most of the time it will not running by default. You can check it by /etc/init.d/mysqld status.
If it's not running then start it first:
.../etc/init.d/mysqld start.
I bet it will 110% work.
If you're using Amazon EC2, and you're having this problem on the instance, then you only need to do:
sudo yum install mysql-server
sudo service mysqld restart
Amazon EC2 doesn't have a server installed (only the client is installed), so in case of that you need to install that on your instance, and after that try
mysql -u root -p
to check if that worked.
Instead of using localhost:
mysql -u myuser -pmypassword -h localhost mydatabase
Use 127.0.0.1
mysql -u myuser -pmypassword -h 127.0.0.1 mydatabase
(also note, no space between -p and mypassword)
Enjoy :)
Here's what worked for me:
ln -s /var/lib/mysql/mysql.sock /tmp/mysql.sock
service mysql restart
This creates a link.
Make sure you have backups of important databases and then try uninstall MySQL related stuff:
apt-get remove --purge mysql\*
Then install it again:
apt-get install mysql-server mysql-client
This worked for me and data was kept.
If PHP MySQL shows errors you might have to reinstall PHP MySQL:
apt-get install php5-fpm php5-mysql
I also facing same problem it will be occur if your mysql server is not running by default it will again stop after some sec so you again run ($ sudo service mysql start ) command you can change if know.
for that use command
$ sudo service mysql start
(put user password if required because we use sudo )
and then run
$ sudo mysql -u root -p (put user password if required )
now you got your database
Fist,try to restart it with
service mysql stop
service mysql start
If above not resolve the issue, now let's go...
Uninstall completely MySQL
sudo apt-get remove --purge mysql\*
reinstall it
sudo apt install mysql-server mysql-client
test if it run
sudo mysql
Install php drivers
sudo apt install php7.4 php7.4-fpm php7.4-mysql php7.4-cgi php7.4-cli php7.4-common
You can replace php7.4 by php7.x or php8.0.12 or later
Very nice !
❗️Be careful, you lose your data if they are not saved. Please backup your data if possible yet.
I got this problem too, but I just did:
sudo service mysql restart
It worked for me.
It seems your MYSQL is stopped. use below command to start MySQL again
sudo service mysql start
I FOUND THE SOLUTION
Before firing the command : mysql_secure_installation
Step 1: sudo systemctl stop mariadb
Step 2: sudo systemctl start mariadb
Step 3: mysql_secure_installation
Then it will ask root password and you can simply press Enter and set your new root password.
If your installation was recent, you should to confirm if your installation is the installation SERVER... as mysql-server-5.5.. Maybe you installed only "mysql" .. this is only client instead of the server.
If you have XAMPP installed on your Linux machine, try to copy your my.cnf file from /opt/lampp/etc/my.cnf to /etc/my.cnf.
Then, run the mysql -u root again... You should now have the correct socket and be able to run the MySQL client.
In my case, the default port 3306 was being used by some other process and thus it was not starting. After I stopped the other service and did sudo service mysql start, it worked fine. BTW, you can use something like sudo lsof -Pn -iTCP:3306 to see who may be using the port.
In my case it worked by doing some R&D:
I am able to connect to MySQL using
root-debian#mysql -h 127.0.0.1 -u root -p
But it's not working with mysql -u root -p.
I did not find any bind-address in my.cnf. So I outcommented the parameter socket=/var/lib/mysql/mysqld.sock in my.cnf which was causing me a problem with login.
After restarting the service it went fine:
root#debian:~# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.6.19 MySQL Community Server (GPL)
In my case, It seems like I wasnt really able to kill the mysql process, when I run
sudo service mysql stop
ps -ef | grep mysql
The mysql process was always there, it looks like it was blocking the socket file and new mysql process wasnt able to create it itself.
so this helped
cd /var/run
sudo cp mysqld/ mysqld.bc -rf
sudo chown mysql:mysql mysqld.bc/
sudo service mysql stop
sudo cp mysqld.bc/ mysqld -rf
sudo chown mysql:mysql mysqld -R
sudo /usr/sbin/mysqld --skip-grant-tables --skip-networking &
Now Im able to log in database using
mysql -u root
Then to update root password:
UPDATE user SET authentication_string=password('YOURPASSWORDHERE') WHERE user='root';
FLUSH PRIVILEGES;
PS: I had trouble updating root passwod, seems like problem with "auth_socket" plugin, so I had to create new user with full privileges
insert into user set `Host` = "localhost", `User` = "super", `plugin` = "mysql_native_password", `authentication_string` = NULL, `password_expired` = "N", `password_lifetime` = NULL, `account_locked` = "N", `Select_priv` = "Y",
`Insert_priv` = "Y", `Update_priv` = "Y", `Delete_priv` = "Y", `Create_priv` = "Y", `Drop_priv` = "Y", `Reload_priv` = "Y", `Shutdown_priv` = "Y", `Process_priv` = "Y", `File_priv` = "Y",
`Grant_priv` = "Y", `References_priv` = "Y", `Index_priv` = "Y", `Alter_priv` = "Y", `Show_db_priv` = "Y", `Super_priv` = "Y", `Create_tmp_table_priv` = "Y", `Lock_tables_priv` = "Y",
`Execute_priv` = "Y", `Repl_slave_priv` = "Y", `Repl_client_priv` = "Y", `Create_view_priv` = "Y", `Show_view_priv` = "Y", `Create_routine_priv` = "Y", `Alter_routine_priv` = "Y",
`Create_user_priv` = "Y", `Event_priv` = "Y", `Trigger_priv` = "Y", `Create_tablespace_priv` = "Y";
This creates user "super" with no password and then you can connect with mysql -u super
On Debian server Jessie, my working solution was to simply do
service mysql restart
service mysql reload
as root user
i solved this problem with restart mysql
/etc/init.d/mysql stop
and
/etc/init.d/mysql start
that's it.
You are missing permission to create /var/run/mysqld directory.So please create and
give permission as following.
mkdir -p /var/run/mysqld
chown mysql:mysql /var/run/mysqld