启动MYSQL数据库时，报 ERROR! The server quit without updating PID file
root@localhost bin\]# ps -ef \|grep mysql root 155995 110447 0 03:24 pts/0 00:00:00 grep --color=auto mysql \[root@localhost bin\]# service mysqld start Starting MySQL.Logging to '/data/mysql/data/localhost.localdomain.err'. 2023-11-06T08:24:13.596845Z mysqld_safe The file /usr/local/mysql/bin/mysqld does not exist or is not executable. Please cd to the mysql installation directory and restart this script from there as follows: ./bin/mysqld_safe\& See http://dev.mysql.com/doc/mysql/en/mysqld-safe.html for more information ERROR! The server quit without updating PID file (/data/mysql/data/localhost.localdomain.pid). 主要原因是我没有修改mysqld_safe文件中的安装目录和数据目录。 \[root@localhost bin\]# ./mysql mysql mysql_config_editor mysqldumpslow mysql_secure_installation mysql_upgrade mysqladmin mysqld mysql_embedded mysqlshow mysqlxtest mysqlbinlog mysqld-debug mysqlimport mysqlslap mysqlcheck mysqld_multi mysql_install_db mysql_ssl_rsa_setup mysql_client_test_embedded mysqld_safe mysql_plugin mysqltest_embedded mysql_config mysqldump mysqlpump mysql_tzinfo_to_sql \[root@localhost bin\]# ./mysqld_safe --datadir=/data/mysql/data/ 2023-11-06T08:32:36.755407Z mysqld_safe Logging to '/data/mysql/data//localhost.localdomain.err'. 2023-11-06T08:32:36.758791Z mysqld_safe error: log-error set to '/data/mysql/data//localhost.localdomain.err', however file don't exists. Create writable for user 'mysql'. \[root@localhost bin\]# chown -R mysql:mysql /data/mysql/ \[root@localhost bin\]# chmod -R 777 /data/mysql/ \[root@localhost bin\]# ./mysqld_safe --datadir=/data/mysql/data/ 2023-11-06T08:33:47.980123Z mysqld_safe Logging to '/data/mysql/data//localhost.localdomain.err'. 2023-11-06T08:33:47.983541Z mysqld_safe error: log-error set to '/data/mysql/data//localhost.localdomain.err', however file don't exists. Create writable for user 'mysql'. 修改完数据库可以启动了，开始修改数据库密码，又以下错误，原来是没有权限创建sock文件，做了软链接 \[mysql@localhost bin\]$ ./mysql -u root -p'S\>Vqjfffwl2344444444455e2vJ' 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 '/tmp/mysql.sock' (2) \[mysql@localhost bin\]$ ln -s /var/lib/mysql/mysql.sock /tmp \[mysql@localhost bin\]$ ./mysql -u root -p'S\>qVwjffwle2evJ' mysql: \[Warning\] Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \\g. Your MySQL connection id is 3 Server version: 5.7.17 Copyright © 2000, 2016, 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\> alter user 'root'@'localhost' identified by 'password'; Query OK, 0 rows affected (0.00 sec) mysql\> flush privileges; Query OK, 0 rows affected (0.00 sec) mysql\> 搞定。