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这篇文章主要介绍“mysql多实例如何部署”的相关知识，小编通过实际案例向大家展示操作过程，操作方法简单快捷，实用性强，希望这篇“mysql多实例如何部署”文章能帮助大家解决问题。
[root@lnh ~]# rpm -qa |grep mysql [root@lnh ~]# ss -antl State Recv-Q Send-Q Local Address:Port Peer Address:Port Process LISTEN 0 128 0.0.0.0:22 0.0.0.0:* LISTEN 0 128 [::]:22 [::]:* //验证一下是否有mysql [root@lnh ~]# cd /usr/src/ [root@lnh src]# wget https://downloads.mysql.com/archives/get/p/23/file/mysql-5.7.38-linux-glibc2.12-x86_64.tar.gz --2022-07-31 14:25:22-- https://downloads.mysql.com/archives/get/p/23/file/mysql-5.7.38-linux-glibc2.12-x86_64.tar.gz Resolving downloads.mysql.com (downloads.mysql.com)... 23.10.6.175, 2600:1405:1800:19c::2e31, 2600:1405:1800:184::2e31 Connecting to downloads.mysql.com (downloads.mysql.com)|23.10.6.175|:443... connected. HTTP request sent, awaiting response... 302 Moved Temporarily Location: https://cdn.mysql.com/archives/mysql-5.7/mysql-5.7.38-linux-glibc2.12-x86_64.tar.gz [following] --2022-07-31 14:25:23-- https://cdn.mysql.com/archives/mysql-5.7/mysql-5.7.38-linux-glibc2.12-x86_64.tar.gz Resolving cdn.mysql.com (cdn.mysql.com)... 23.212.157.5 Connecting to cdn.mysql.com (cdn.mysql.com)|23.212.157.5|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 674830866 (644M) [application/x-tar-gz] Saving to: ‘mysql-5.7.38-linux-glibc2.12-x86_64.tar.gz' mysql-5.7.38-linux-g 100%[=====================>] 643.57M 1.88MB/s in 8m 54s 2022-07-31 14:34:17 (1.21 MB/s) - ‘mysql-5.7.38-linux-glibc2.12-x86_64.tar.gz' saved [674830866/674830866] //在www.mysql.com里面进行复制下载地址 [root@lnh src]# ls debug kernels mysql-5.7.38-linux-glibc2.12-x86_64.tar.gz
[root@lnh src]# useradd -r -M -s /sbin/nologin mysql [root@lnh src]# id mysql uid=993(mysql) gid=990(mysql) groups=990(mysql) [root@lnh src]# tar -xf mysql-5.7.38-linux-glibc2.12-x86_64.tar.gz -C /usr/local/ [root@lnh src]# cd /usr/local/ [root@lnh local]# ll //查看解压的东西 total 0 drwxr-xr-x. 14 root root 164 Jul 21 21:32 apache drwxr-xr-x. 6 root root 58 Jul 21 21:12 apr drwxr-xr-x. 5 root root 43 Jul 21 21:17 apr-util drwxr-xr-x. 2 root root 6 May 19 2020 bin drwxr-xr-x. 2 root root 6 May 19 2020 etc drwxr-xr-x. 2 root root 6 May 19 2020 games drwxr-xr-x. 2 root root 6 May 19 2020 include drwxr-xr-x. 2 root root 6 May 19 2020 lib drwxr-xr-x. 3 root root 17 Jul 19 16:13 lib64 drwxr-xr-x. 2 root root 6 May 19 2020 libexec drwxr-xr-x. 9 root root 129 Jul 31 14:56 mysql-5.7.38-linux-glibc2.12-x86_64 drwxr-xr-x. 2 root root 6 May 19 2020 sbin drwxr-xr-x. 5 root root 49 Jul 19 16:13 share drwxr-xr-x. 5 root root 145 Jul 21 21:19 src [root@lnh local]# ln -sv mysql-5.7.38-linux-glibc2.12-x86_64 mysql //做一个软链接 //-v是将结果打印出来 'mysql' -> 'mysql-5.7.38-linux-glibc2.12-x86_64' [root@lnh local]# ll //查看 total 0 drwxr-xr-x. 14 root root 164 Jul 21 21:32 apache drwxr-xr-x. 6 root root 58 Jul 21 21:12 apr drwxr-xr-x. 5 root root 43 Jul 21 21:17 apr-util drwxr-xr-x. 2 root root 6 May 19 2020 bin drwxr-xr-x. 2 root root 6 May 19 2020 etc drwxr-xr-x. 2 root root 6 May 19 2020 games drwxr-xr-x. 2 root root 6 May 19 2020 include drwxr-xr-x. 2 root root 6 May 19 2020 lib drwxr-xr-x. 3 root root 17 Jul 19 16:13 lib64 drwxr-xr-x. 2 root root 6 May 19 2020 libexec lrwxrwxrwx. 1 root root 35 Jul 31 14:58 mysql -> mysql-5.7.38-linux-glibc2.12-x86_64 drwxr-xr-x. 9 root root 129 Jul 31 14:56 mysql-5.7.38-linux-glibc2.12-x86_64 drwxr-xr-x. 2 root root 6 May 19 2020 sbin drwxr-xr-x. 5 root root 49 Jul 19 16:13 share drwxr-xr-x. 5 root root 145 Jul 21 21:19 src [root@lnh local]# chown -R mysql.mysql mysql* //将软链接的属主属组改成mysql的 [root@lnh local]# ll total 0 drwxr-xr-x. 14 root root 164 Jul 21 21:32 apache drwxr-xr-x. 6 root root 58 Jul 21 21:12 apr drwxr-xr-x. 5 root root 43 Jul 21 21:17 apr-util drwxr-xr-x. 2 root root 6 May 19 2020 bin drwxr-xr-x. 2 root root 6 May 19 2020 etc drwxr-xr-x. 2 root root 6 May 19 2020 games drwxr-xr-x. 2 root root 6 May 19 2020 include drwxr-xr-x. 2 root root 6 May 19 2020 lib drwxr-xr-x. 3 root root 17 Jul 19 16:13 lib64 drwxr-xr-x. 2 root root 6 May 19 2020 libexec lrwxrwxrwx. 1 mysql mysql 35 Jul 31 14:58 mysql -> mysql-5.7.38-linux-glibc2.12-x86_64 drwxr-xr-x. 9 mysql mysql 129 Jul 31 14:56 mysql-5.7.38-linux-glibc2.12-x86_64 drwxr-xr-x. 2 root root 6 May 19 2020 sbin drwxr-xr-x. 5 root root 49 Jul 19 16:13 share drwxr-xr-x. 5 root root 145 Jul 21 21:19 src [root@lnh local]# ls //编译三部曲已经完成 apache bin include libexec sbin apr etc lib mysql share apr-util games lib64 mysql-5.7.38-linux-glibc2.12-x86_64 src [root@lnh local]# cd mysql [root@lnh mysql]# ls bin docs include lib LICENSE man README share support-files [root@lnh mysql]# echo 'export PATH=$PATH:/usr/local/mysql/bin' > /etc/profile.d/mysql.sh //配置环境变量 [root@lnh mysql]# source /etc/profile.d/mysql.sh //使环境生效 [root@lnh mysql]# ln -sv /usr/local/mysql/include/ /usr/include/mysql '/usr/include/mysql' -> '/usr/local/mysql/include/' //做include的头文件让系统可以识别 [root@lnh mysql]# chown -R mysql.mysql /usr/include/mysql //将软链接的属主属组改成mysql的 [root@lnh mysql]# ll -d /usr/include/mysql/ drwxr-xr-x. 3 mysql mysql 4096 Jul 31 14:56 /usr/include/mysql/ [root@lnh mysql]# vim /etc/ld.so.conf.d/mysql.conf [root@lnh mysql]# cat /etc/ld.so.conf.d/mysql.conf /usr/local/mysql/lib //配置lib [root@lnh mysql]# ldconfig //刷新配置 [root@lnh mysql]# vim /etc/man_db.conf #MANDATORY_MANPATH /usr/src/pvm3/man # MANDATORY_MANPATH /usr/man MANDATORY_MANPATH /usr/share/man MANDATORY_MANPATH /usr/local/share/man MANDATORY_MANPATH /usr/local/mysql/man//添加这一行
[root@lnh ~]# mkdir -p /opt/data/{3306,3307,3308} //创建存放目录
[root@lnh ~]# chown -R mysql.mysql /opt/data/
[root@lnh ~]# ll -d /opt/data/
drwxr-xr-x. 5 mysql mysql 42 Jul 31 15:24 /opt/data/
//修改其所属主所属组
[root@lnh ~]# tree /opt/data/
/opt/data/
├── 3306
├── 3307
└── 3308
3 directories, 0 files
//查看其结构[root@lnh ~]# mysqld --initialize --user mysql --datadir /opt/data/3306 //初始化实例 --user指定用户 --datadir指定数据目录 2022-07-31T07:29:37.154689Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 2022-07-31T07:29:37.346729Z 0 [Warning] InnoDB: New log files created, LSN=45790 2022-07-31T07:29:37.389866Z 0 [Warning] InnoDB: Creating foreign key constraint system tables. 2022-07-31T07:29:37.450981Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 88389665-10a2-11ed-9840-000c2905f428. 2022-07-31T07:29:37.452192Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened. 2022-07-31T07:29:37.758320Z 0 [Warning] A deprecated TLS version TLSv1 is enabled. Please use TLSv1.2 or higher. 2022-07-31T07:29:37.758378Z 0 [Warning] A deprecated TLS version TLSv1.1 is enabled. Please use TLSv1.2 or higher. 2022-07-31T07:29:37.759177Z 0 [Warning] CA certificate ca.pem is self signed. 2022-07-31T07:29:37.780720Z 1 [Note] A temporary password is generated for root@localhost: AqldE*a:O8FR [root@lnh ~]# echo 'AqldE*a:O8FR' > 3306 [root@lnh ~]# cat 3306 AqldE*a:O8FR //将这个格式化的随机密码生成到一个文件里面 [root@lnh ~]# mysqld --initialize --user mysql --datadir /opt/data/3307 //格式化3307 2022-07-31T07:33:29.214978Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 2022-07-31T07:33:29.491805Z 0 [Warning] InnoDB: New log files created, LSN=45790 2022-07-31T07:33:29.524728Z 0 [Warning] InnoDB: Creating foreign key constraint system tables. 2022-07-31T07:33:29.598226Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 12977170-10a3-11ed-9d3d-000c2905f428. 2022-07-31T07:33:29.599323Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened. 2022-07-31T07:33:29.932320Z 0 [Warning] A deprecated TLS version TLSv1 is enabled. Please use TLSv1.2 or higher. 2022-07-31T07:33:29.932367Z 0 [Warning] A deprecated TLS version TLSv1.1 is enabled. Please use TLSv1.2 or higher. 2022-07-31T07:33:29.932766Z 0 [Warning] CA certificate ca.pem is self signed. 2022-07-31T07:33:30.095306Z 1 [Note] A temporary password is generated for root@localhost: PAJBo+Gxg19I [root@lnh ~]# echo ' PAJBo+Gxg19I' > 3307 [root@lnh ~]# cat 3307 PAJBo+Gxg19I [root@lnh ~]# mysqld --initialize --user mysql --datadir /opt/data/3308 //格式化3308 2022-07-31T07:34:23.861697Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 2022-07-31T07:34:24.082852Z 0 [Warning] InnoDB: New log files created, LSN=45790 2022-07-31T07:34:24.112764Z 0 [Warning] InnoDB: Creating foreign key constraint system tables. 2022-07-31T07:34:24.173299Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 331ef070-10a3-11ed-a122-000c2905f428. 2022-07-31T07:34:24.175009Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened. 2022-07-31T07:34:24.374707Z 0 [Warning] A deprecated TLS version TLSv1 is enabled. Please use TLSv1.2 or higher. 2022-07-31T07:34:24.374737Z 0 [Warning] A deprecated TLS version TLSv1.1 is enabled. Please use TLSv1.2 or higher. 2022-07-31T07:34:24.375103Z 0 [Warning] CA certificate ca.pem is self signed. 2022-07-31T07:34:24.471521Z 1 [Note] A temporary password is generated for root@localhost: =w&lnU)d-7kK [root@lnh ~]# echo ' =w&lnU)d-7kK' > 3308 [root@lnh ~]# cat 3308 =w&lnU)d-7kK [root@lnh ~]# ls 3306 3307 3308 anaconda-ks.cfg
[root@lnh ~]# dnf -y install perl Last metadata expiration check: 1:24:50 ago on Sun 31 Jul 2022 02:13:54 PM CST. Dependencies resolved. =================================================================================== Package Arch Version Repo Size =================================================================================== Installing: perl x86_64 4:5.26.3-420.el8 AppStream 73 k Installing dependencies: perl-Algorithm-Diff noarch 1.1903-9.el8 base 52 k perl-Archive-Tar noarch 2.30-1.el8 base 79 k perl-Archive-Zip noarch 1.60-3.el8 AppStream 108 k perl-Attribute-Handlers noarch 0.99-420.el8 AppStream 89 k perl-B-Debug noarch 1.26-2.el8 AppStream 26 k perl-CPAN noarch 2.18-397.el8 AppStream 554 k perl-CPAN-Meta noarch 2.150010-396.el8 AppStream 191 k perl-CPAN-Meta-Requirements noarch 2.140-396.el8 AppStream 37 k perl-CPAN-Meta-YAML noarch 0.018-397.el8 AppStream 34 k perl-Compress-Bzip2 x86_64 2.26-6.el8 AppStream 72 k perl-Compress-Raw-Bzip2 x86_64 2.081-1.el8 base 40 k perl-Compress-Raw-Zlib x86_64 2.081-1.el8 base 68 k perl-Config-Perl-V noarch 0.30-1.el8 AppStream 22 k perl-DB_File x86_64 1.842-1.el8 AppStream 83 k perl-Data-OptList noarch 0.110-6.el8 AppStream 31 k perl-Data-Section noarch 0.200007-3.el8 AppStream 30 k perl-Devel-PPPort x86_64 3.36-5.el8 AppStream 118 k perl-Devel-Peek x86_64 1.26-420.el8 AppStream 94 k perl-Devel-SelfStubber noarch 1.06-420.el8 AppStream 76 k perl-Devel-Size x86_64 0.81-2.el8 AppStream 34 k perl-Digest-SHA x86_64 1:6.02-1.el8 AppStream 66 k perl-Encode-devel x86_64 4:2.97-3.el8 AppStream 39 k perl-Env noarch 1.04-395.el8 AppStream 21 k perl-ExtUtils-CBuilder noarch 1:0.280230-2.el8 AppStream 48 k perl-ExtUtils-Command noarch 1:7.34-1.el8 AppStream 19 k perl-ExtUtils-Embed noarch 1.34-420.el8 AppStream 79 k ....
[root@lnh ~]# vim /etc/my.cnf [root@lnh ~]# cat /etc/my.cnf [mysqld_multi] //程序命令 mysqld = /usr/local/mysql/bin/mysqld_safe //命令执行的路径 mysqladmin = /usr/local/mysql/bin/mysqladmin //命令执行的路径 [mysqld3306] datadir = /opt/data/3306 //数据目录 port = 3306 //端口 socket = /tmp/mysql3306.sock //套接字 pid-file = /opt/data/3306/mysql_3306.pid //pid进程文件 log-error=/var/log/3306.log //错误日志 [mysqld3307] datadir = /opt/data/3307 port = 3307 socket = /tmp/mysql3307.sock pid-file = /opt/data/3307/mysql_3307.pid log-error=/var/log/3307.log [mysqld3308] datadir = /opt/data/3308 port = 3308 socket = /tmp/mysql3308.sock pid-file = /opt/data/3308/mysql_3308.pid log-error=/var/log/3308.log
[root@lnh ~]# mysqld_multi start 3306
[root@lnh ~]# mysqld_multi start 3307
[root@lnh ~]# mysqld_multi start 3308
[root@lnh ~]# ss -antl
State Recv-Q Send-Q Local Address:Port Peer Address:Port Process
LISTEN 0 128 0.0.0.0:22 0.0.0.0:*
LISTEN 0 128 [::]:22 [::]:*
LISTEN 0 80 *:3306 *:*
LISTEN 0 80 *:3307 *:*
LISTEN 0 80 *:3308 *:*
//这种方式启动不建议
[root@lnh ~]# mysqld_multi stop 3308
[root@lnh ~]# ss -antl
State Recv-Q Send-Q Local Address:Port Peer Address:Port Process
LISTEN 0 128 0.0.0.0:22 0.0.0.0:*
LISTEN 0 128 [::]:22 [::]:*
LISTEN 0 80 *:3306 *:*
LISTEN 0 80 *:3307 *:*
LISTEN 0 80 *:3308 *:*
//可以发现这种方式启动程序后关闭不了
[root@lnh ~]# ps -ef |grep 3306
root 71742 1 0 15:49 pts/1 00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/opt/data/3306 --port=3306 --socket=/tmp/mysql3306.sock --pid-file=/opt/data/3306/mysql_3306.pid --log-error=/var/log/3306.log
mysql 71878 71742 0 15:49 pts/1 00:00:00 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/opt/data/3306 --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/var/log/3306.log --pid-file=/opt/data/3306/mysql_3306.pid --socket=/tmp/mysql3306.sock --port=3306
root 72257 66880 0 15:53 pts/1 00:00:00 grep --color=auto 3306
//查看3306进程
[root@lnh ~]# ps -ef |grep 3306 |grep -v grep
root 71742 1 0 15:49 pts/1 00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/opt/data/3306 --port=3306 --socket=/tmp/mysql3306.sock --pid-file=/opt/data/3306/mysql_3306.pid --log-error=/var/log/3306.log
mysql 71878 71742 0 15:49 pts/1 00:00:00 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/opt/data/3306 --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/var/log/3306.log --pid-file=/opt/data/3306/mysql_3306.pid --socket=/tmp/mysql3306.sock --port=3306
//取反
[root@lnh ~]# ps -ef |grep 3306 |grep -v grep |awk '{print$2}'
71742
71878
//取出端口号
[root@lnh ~]# ps -ef |grep 3306 |grep -v grep |awk '{print$2}'|xargs kill -9
//xargs将前面的结果交给后面的来处理
//杀死了端口号,相当于这个命令可以控制服务停止
[root@lnh ~]# ps -ef |grep 3307 |grep -v grep |awk '{print$2}'|xargs kill -9
[root@lnh ~]# ps -ef |grep 3308 |grep -v grep |awk '{print$2}'|xargs kill -9
[root@lnh ~]# ss -antl
State Recv-Q Send-Q Local Address:Port Peer Address:Port Process
LISTEN 0 128 0.0.0.0:22 0.0.0.0:*
LISTEN 0 128 [::]:22 [::]:*
//端口号都被杀死[root@lnh system]# cd
[root@lnh ~]# cd /usr/lib/systemd/system
[root@lnh system]# cp sshd.service 3306.service
[root@lnh system]# cp sshd.service 3307.service
[root@lnh system]# cp sshd.service 3308.service
[root@lnh system]# vim 3306.service
[Unit]
Description=3306 server daemon
After=network.target sshd-keygen.target
[Service]
Type=forking
ExecStart=/usr/local/mysql/bin/mysqld_multi start 3306 //开启的位置
ExecStop=ps -ef |grep 3306 |grep -v grep |awk '{print$2}'|xargs kill -9 //关闭的命令
ExecReload=/bin/kill -HUP $MAINPID
[Install]
WantedBy=multi-user.target
[root@lnh system]# cp 3306.service 3307.service
cp: overwrite '3307.service'? y
[root@lnh system]# vim 3307.service
[Unit]
Description=3307 server daemon
After=network.target sshd-keygen.target
[Service]
Type=forking
ExecStart=/usr/local/mysql/bin/mysqld_multi start 3307
ExecStop=ps -ef |grep 3307 |grep -v grep |awk '{print$2}'|xargs kill -9
ExecReload=/bin/kill -HUP $MAINPID
[Install]
WantedBy=multi-user.target
//快捷键 :% s/6/7/g 直接将6变成7
[root@lnh system]# cp 3306.service 3308.service
cp: overwrite '3308.service'? y
[root@lnh system]# vim 3308.service
[Unit]
Description=3308 server daemon
After=network.target sshd-keygen.target
[Service]
Type=forking
ExecStart=/usr/local/mysql/bin/mysqld_multi start 3308
ExecStop=ps -ef |grep 3308 |grep -v grep |awk '{print$2}'|xargs kill -9
ExecReload=/bin/kill -HUP $MAINPID
[Install]
WantedBy=multi-user.target
//快捷键 :% s/6/8/g 直接将6变成8
[root@lnh system]# systemctl daemon-reload
//加载一下
[root@lnh system]# systemctl stop firewalld
[root@lnh system]# systemctl disable firewalld.service
Removed /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
[root@lnh system]# vim /etc/selinux/config
SELINUX=disabled //修改
[root@lnh system]# setenforce 0
//关闭防火墙
[root@lnh system]# systemctl start 3306
[root@lnh system]# systemctl start 3307
[root@lnh system]# systemctl start 3308
[root@lnh system]# ss -antl
State Recv-Q Send-Q Local Address:Port Peer Address:Port Process
LISTEN 0 128 0.0.0.0:22 0.0.0.0:*
LISTEN 0 128 [::]:22 [::]:*
LISTEN 0 80 *:3306 *:*
LISTEN 0 80 *:3307 *:*
LISTEN 0 80 *:3308 *:*
//可以发现全部启动成功
//如果启动失败就在这个里面journalctl -xe找出错误点[root@lnh ~]# cat 3306
AqldE*a:O8FR //查看之前放置的密码
[root@lnh ~]# mysql -uroot -p'AqldE*a:O8FR' -S /tmp/mysql3306.sock
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 2
Server version: 5.7.38
Copyright (c) 2000, 2022, Oracle and/or its affiliates.
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> set password=password('3306'); //修改密码
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> quit
Bye
[root@lnh ~]# mysql -uroot -p'3306' -S /tmp/mysql3306.sock
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: 5.7.38 MySQL Community Server (GPL)
Copyright (c) 2000, 2022, Oracle and/or its affiliates.
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>
//登录成功
[root@lnh ~]# cat 3307
PAJBo+Gxg19I
[root@lnh ~]# mysql -uroot -p'PAJBo+Gxg19I' -S /tmp/mysql3307.sock
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: 5.7.38
Copyright (c) 2000, 2022, Oracle and/or its affiliates.
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> set password=password('3307'); //修改密码
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> quit
Bye
[root@lnh ~]# mysql -uroot -p'3307' -S /tmp/mysql3307.sock
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 4
Server version: 5.7.38 MySQL Community Server (GPL)
Copyright (c) 2000, 2022, Oracle and/or its affiliates.
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>
//登录成功
[root@lnh ~]# cat 3308
=w&lnU)d-7kK
[root@lnh ~]# mysql -uroot -p'=w&lnU)d-7kK' -S /tmp/mysql3308.sock
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 2
Server version: 5.7.38
Copyright (c) 2000, 2022, Oracle and/or its affiliates.
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> set password=password('3308'); //修改密码
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> quit
Bye
[root@lnh ~]# mysql -uroot -p'3308' -S /tmp/mysql3308.sock
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: 5.7.38 MySQL Community Server (GPL)
Copyright (c) 2000, 2022, Oracle and/or its affiliates.
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>
//登录成功报错1：
[root@lnh ~]# mysql -uroot -p'AqldE*a:O8FR'
mysql: error while loading shared libraries: libncurses.so.5: cannot open shared object file: No such file or directory
//没有这个包
解决：
[root@lnh ~]# dnf provides libncurses.so.5
Last metadata expiration check: 2:39:05 ago on Sun 31 Jul 2022 02:13:54 PM CST.
ncurses-compat-libs-6.1-9.20180224.el8.i686 : Ncurses compatibility libraries
Repo : base
Matched from:
Provide : libncurses.so.5[root@lnh ~]# dnf -y install ncurses-compat-libs-6.1-9.20180224.el8.
报错2：
[root@lnh ~]# mysql -uroot -p'AqldE*a:O8FR'
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) //没有访问到套接字
解决：[root@lnh ~]# mysql -uroot -p'AqldE*a:O8FR' -S /tmp/mysql3306.sock
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