笔者的服务器系统和MySQL版本如下:
[root@htlwk0001host ~]# mysql -V
mysql Ver 14.14 Distrib 5.7.31, for Linux (x86_64) using EditLine wrapper
[root@htlwk0001host ~]# cat /etc/redhat-release
CentOS Linux release 8.2.2004 (Core)
MySQL 的配置文件路径是 /etc/my.cnf
,那么我们就查看这个配置文件的内容:
[root@htlwk0001host ~]# cat /etc/my.cnf
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
lower_case_table_names=1
character-set-client-handshake=FALSE
character-set-server=utf8mb4
collation-server=utf8mb4_unicode_ci
init_connect='SET NAMES utf8mb4'
#skip-grant-tables
[client]
default-character-set=utf8mb4
#default-character-set=gbk
[mysql]
default-character-set=utf8mb4
#default-character-set=gbk
[mysqld]
#default-character-set=gbk
secure-file-priv=''
在配置文件中,可以看到 datadir=/var/lib/mysql
,所以数据库的数据根目录就是 /var/lib/mysql
。
我们可以查看 /var/lib/mysql 目录下的内容:
[root@htlwk0001host ~]# ls /var/lib/mysql
auto.cnf ca-key.pem client-cert.pem ib_buffer_pool ib_logfile0 ibtmp1 mysql.sock mysql_upgrade_info private_key.pem public_key.pem server-cert.pem sys zentao
binlog.index ca.pem client-key.pem ibdata1 ib_logfile1 mysql mysql.sock.lock performance_schema production qydpw server-key.pem test
每个数据库(除了information_schema)对应的物理目录文件都在里面。