search
HomeDatabaseMysql TutorialStart mysql database operation under linux system

This article mainly talks about starting the mysql database operation under the Linux system. Interested friends can learn more.

{mysql} represents the installation directory of mysql
How to start/stop/restart MySQL
1. Startup method
1. Use service to start: service mysqld start
2. Use mysqld Script startup: /etc/inint.d/mysqld start
If mysqld cannot be found under /etc/inint.d/, you can go to the mysql installation directory, {mysql}/init.d/mysqld start
3. Use safe_mysqld to start: safe_mysqld&
2. Stop
1. Use service to start: service mysqld stop
2. Use the mysqld script to start: /etc/inint.d/mysqld stop
If /etc/inint If mysqld cannot be found under .d/, you can go to the mysql installation directory, {mysql}/init.d/mysqld stop
3. mysqladmin shutdown
3. Restart
1. Use service to start: service mysqld restart
 2. Use the mysqld script to start: /etc/inint.d/mysqld restart
If mysqld cannot be found under /etc/inint.d/, you can go to the mysql installation directory, {mysql}/init.d/ mysqld restart
Question edit summary
How to start/stop/restart MySQL
1. Start method
1. Use service to start: service mysqld start
2. Use mysqld script to start: /etc/ inint.d/mysqld start
 3. Start using safe_mysqld: safe_mysqld&
2. Stop
1. Start using service: service mysqld stop
2. Start using the mysqld script: /etc/inint.d /mysqld stop
3. mysqladmin shutdown
3. Restart
1. Use service to start: service mysqld restart
2. Use mysqld script to start: /etc/inint.d/mysqld restart
When I first started learning mysql, I used the one that comes with redhat. What is startup/rc.d/init.d/ start
This is very simple, but the more I learn later, some of the mysql that comes with the system are too low version, and some are related to the web service I want to install. The lower version of mysql required
Later I learned to install mysql using tar. My mysql was installed in the /usr/local/mysql directory and I encountered many problems when starting it. The most common ones are:
ERROR 2002: Can't connect to local MySQL server through socket
'/tmp/mysql.sock' (111)
Solution:
[root@test mysql] # /usr/local/mysql/bin/mysqladmin -u root /
 > -S /var/lib/mysql/mysql.sock password 'your.passwd'
 Or make a connection
 ln - s /var/lib/mysql/mysql.sock /tmp
In fact, when it says that /tmp/mysql.sock cannot be found, sometimes it is not because there is no such file in the /tmp directory, but because the startup
command is wrong. I encountered I don’t remember the common startup methods very clearly. If you are sure that there is a file like mysql.sock under tmp, you might as well try some other commands
/usr/local/mysql /bin/mysql -u root -p
 /usr/local/mysql/bin/mysqld --user=mysql&
 /usr/local/mysql/bin/mysqld --user=root&
 /usr /local/mysql/bin/mysqld_safe --user=root&
 /usr/local/mysql/bin/mysqld_safe --user=mysql&
 /usr/local/mysql/bin/safe_mysqld--uer=root&( Note that safe_mysqld is different from mysqld_safe, & means mysql is running in the background) Mine will report an error
 STOPPING server from pid file
 /usr/local/mysql/data/localhost.localdomain.pid
 060304 11:46:21 mysqld ended
This is a permission issue. My mysql directory belongs to the root user and the root group. If I use mysqld_safe to start, it will be no problem.
Everyone just needs to pay attention to these mysql, safe_mysqld , mysqld_safe, mysqld, mysqladmin. Try more
Several times
In fact, sometimes mysql has started normally, check whether mysql starts the command
ps -aux | grep mysqld
You will see something similar to the following
MySQL 6394 0.0 1.5 10528 992 pts/3 S 16:16 0:00
/usr/local/mysql/
MySQL 6395 0.0 1.5 10528 992 pts/3 S 16:16 0:00
/ usr/local/mysql/
 mysql 6396 0.0 1.5 10528 992 pts/3 S 16:16 0:00
 /usr/local/mysql/
 root 6422 0.0 1.1 2408 732 pts/3 S 16: 20 0:00 grep
Mysql
Check whether mysql is listening on the port command
netstat -tl | grep mysql
You will see something similar to the following
tcp 0 0 *:mysql *:* LISTEN

Related tutorials:
mysql video tutorial

Linux video tutorial

The above is the detailed content of Start mysql database operation under linux system. For more information, please follow other related articles on the PHP Chinese website!

Statement
This article is reproduced at:CSDN. If there is any infringement, please contact admin@php.cn delete
How to use MySQL functions for data processing and calculationHow to use MySQL functions for data processing and calculationApr 29, 2025 pm 04:21 PM

MySQL functions can be used for data processing and calculation. 1. Basic usage includes string processing, date calculation and mathematical operations. 2. Advanced usage involves combining multiple functions to implement complex operations. 3. Performance optimization requires avoiding the use of functions in the WHERE clause and using GROUPBY and temporary tables.

An efficient way to batch insert data in MySQLAn efficient way to batch insert data in MySQLApr 29, 2025 pm 04:18 PM

Efficient methods for batch inserting data in MySQL include: 1. Using INSERTINTO...VALUES syntax, 2. Using LOADDATAINFILE command, 3. Using transaction processing, 4. Adjust batch size, 5. Disable indexing, 6. Using INSERTIGNORE or INSERT...ONDUPLICATEKEYUPDATE, these methods can significantly improve database operation efficiency.

Steps to add and delete fields to MySQL tablesSteps to add and delete fields to MySQL tablesApr 29, 2025 pm 04:15 PM

In MySQL, add fields using ALTERTABLEtable_nameADDCOLUMNnew_columnVARCHAR(255)AFTERexisting_column, delete fields using ALTERTABLEtable_nameDROPCOLUMNcolumn_to_drop. When adding fields, you need to specify a location to optimize query performance and data structure; before deleting fields, you need to confirm that the operation is irreversible; modifying table structure using online DDL, backup data, test environment, and low-load time periods is performance optimization and best practice.

How to analyze the execution plan of MySQL queryHow to analyze the execution plan of MySQL queryApr 29, 2025 pm 04:12 PM

Use the EXPLAIN command to analyze the execution plan of MySQL queries. 1. The EXPLAIN command displays the execution plan of the query to help find performance bottlenecks. 2. The execution plan includes fields such as id, select_type, table, type, possible_keys, key, key_len, ref, rows and Extra. 3. According to the execution plan, you can optimize queries by adding indexes, avoiding full table scans, optimizing JOIN operations, and using overlay indexes.

How to use MySQL subquery to improve query efficiencyHow to use MySQL subquery to improve query efficiencyApr 29, 2025 pm 04:09 PM

Subqueries can improve the efficiency of MySQL query. 1) Subquery simplifies complex query logic, such as filtering data and calculating aggregated values. 2) MySQL optimizer may convert subqueries to JOIN operations to improve performance. 3) Using EXISTS instead of IN can avoid multiple rows returning errors. 4) Optimization strategies include avoiding related subqueries, using EXISTS, index optimization, and avoiding subquery nesting.

How to configure the character set and collation rules of MySQLHow to configure the character set and collation rules of MySQLApr 29, 2025 pm 04:06 PM

Methods for configuring character sets and collations in MySQL include: 1. Setting the character sets and collations at the server level: SETNAMES'utf8'; SETCHARACTERSETutf8; SETCOLLATION_CONNECTION='utf8_general_ci'; 2. Create a database that uses specific character sets and collations: CREATEDATABASEexample_dbCHARACTERSETutf8COLLATEutf8_general_ci; 3. Specify character sets and collations when creating a table: CREATETABLEexample_table(idINT

How to uninstall MySQL and clean residual filesHow to uninstall MySQL and clean residual filesApr 29, 2025 pm 04:03 PM

To safely and thoroughly uninstall MySQL and clean all residual files, follow the following steps: 1. Stop MySQL service; 2. Uninstall MySQL packages; 3. Clean configuration files and data directories; 4. Verify that the uninstallation is thorough.

How to rename a database in MySQLHow to rename a database in MySQLApr 29, 2025 pm 04:00 PM

Renaming a database in MySQL requires indirect methods. The steps are as follows: 1. Create a new database; 2. Use mysqldump to export the old database; 3. Import the data into the new database; 4. Delete the old database.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

SublimeText3 Linux new version

SublimeText3 Linux new version

SublimeText3 Linux latest version

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool