root@yrserver:/# systemctl status mysql
● mysql.service - MySQL Community Server
     Loaded: loaded (/lib/systemd/system/mysql.service; enabled; vendor preset: enabled)
     Active: active (running) since Thu 2025-11-20 03:37:04 UTC; 39s ago
    Process: 144118 ExecStartPre=/usr/share/mysql/mysql-systemd-start pre (code=exited, status=0/SUCCESS)
   Main PID: 144130 (mysqld)
     Status: "Server is operational"
      Tasks: 38 (limit: 9387)
     Memory: 364.1M
        CPU: 947ms
     CGroup: /system.slice/mysql.service
             └─144130 /usr/sbin/mysqld


root@yrserver:/# dpkg -l | grep mysql
ii  mysql-client                           8.0.43-0ubuntu0.22.04.2                 all          MySQL database client (metapackage depending on the latest version)
ii  mysql-client-8.0                       8.0.43-0ubuntu0.22.04.2                 amd64        MySQL database client binaries
ii  mysql-client-core-8.0                  8.0.43-0ubuntu0.22.04.2                 amd64        MySQL database core client binaries
ii  mysql-common                           5.8+1.0.8                               all          MySQL database common files, e.g. /etc/mysql/my.cnf
ii  mysql-server                           8.0.43-0ubuntu0.22.04.2                 all          MySQL database server (metapackage depending on the latest version)
ii  mysql-server-8.0                       8.0.43-0ubuntu0.22.04.2                 amd64        MySQL database server binaries and system database setup
ii  mysql-server-core-8.0                  8.0.43-0ubuntu0.22.04.2                 amd64        MySQL database server binaries
root@yrserver:/# cd /data/game
-bash: cd: /data/game: No such file or directory
root@yrserver:/# apt-get remove --purge mysql-client mysql-server mysql-common mysql-server*
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Note, selecting 'mysql-server-5.5' for glob 'mysql-server*'
Note, selecting 'mysql-server-5.6' for glob 'mysql-server*'
Note, selecting 'mysql-server-5.7' for glob 'mysql-server*'
Note, selecting 'mysql-server-8.0' for glob 'mysql-server*'
Note, selecting 'mysql-server' for glob 'mysql-server*'
Note, selecting 'mysql-server-core-5.5' for glob 'mysql-server*'
Note, selecting 'mysql-server-core-5.6' for glob 'mysql-server*'
Note, selecting 'mysql-server-core-5.7' for glob 'mysql-server*'
Note, selecting 'mysql-server-core-8.0' for glob 'mysql-server*'
Package 'mysql-server-5.5' is not installed, so not removed
Package 'mysql-server-5.7' is not installed, so not removed
Package 'mysql-server-core-5.7' is not installed, so not removed
Package 'mysql-server-core-5.5' is not installed, so not removed
Package 'mysql-server-core-5.6' is not installed, so not removed
Package 'mysql-server-5.6' is not installed, so not removed
The following packages were automatically installed and are no longer required:
  libcgi-fast-perl libcgi-pm-perl libclone-perl libencode-locale-perl libevent-pthreads-2.1-7 libfcgi-bin
  libfcgi-perl libfcgi0ldbl libhtml-parser-perl libhtml-tagset-perl libhtml-template-perl libhttp-date-perl
  libhttp-message-perl libio-html-perl liblwp-mediatypes-perl libmecab2 libprotobuf-lite23 libtimedate-perl
  liburi-perl mecab-ipadic mecab-ipadic-utf8 mecab-utils mysql-client-core-8.0
Use 'apt autoremove' to remove them.
The following packages will be REMOVED:
  mysql-client* mysql-client-8.0* mysql-common* mysql-server* mysql-server-8.0* mysql-server-core-8.0*
0 upgraded, 0 newly installed, 6 to remove and 81 not upgraded.
After this operation, 123 MB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 130060 files and directories currently installed.)
Removing mysql-client (8.0.43-0ubuntu0.22.04.2) ...
Removing mysql-server (8.0.43-0ubuntu0.22.04.2) ...
Removing mysql-server-8.0 (8.0.43-0ubuntu0.22.04.2) ...
update-alternatives: using /etc/mysql/my.cnf.fallback to provide /etc/mysql/my.cnf (my.cnf) in auto mode
Removing mysql-client-8.0 (8.0.43-0ubuntu0.22.04.2) ...
Removing mysql-common (5.8+1.0.8) ...
Removing mysql-server-core-8.0 (8.0.43-0ubuntu0.22.04.2) ...
Processing triggers for man-db (2.10.2-1) ...
(Reading database ... 129869 files and directories currently installed.)
Purging configuration files for mysql-server-8.0 (8.0.43-0ubuntu0.22.04.2) ...
Purging configuration files for mysql-common (5.8+1.0.8) ...
dpkg: warning: while removing mysql-common, directory '/etc/mysql' not empty so not removed
root@yrserver:/# dpkg -l | grep mysql
ii  mysql-client-core-8.0                  8.0.43-0ubuntu0.22.04.2                 amd64        MySQL database core client binaries
root@yrserver:/# apt-get remove --purge mysql-client-core-8.0 
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages were automatically installed and are no longer required:
  libcgi-fast-perl libcgi-pm-perl libclone-perl libencode-locale-perl libevent-pthreads-2.1-7 libfcgi-bin
  libfcgi-perl libfcgi0ldbl libhtml-parser-perl libhtml-tagset-perl libhtml-template-perl libhttp-date-perl
  libhttp-message-perl libio-html-perl liblwp-mediatypes-perl libmecab2 libprotobuf-lite23 libtimedate-perl
  liburi-perl mecab-ipadic mecab-ipadic-utf8 mecab-utils
Use 'apt autoremove' to remove them.
The following packages will be REMOVED:
  mysql-client-core-8.0*
0 upgraded, 0 newly installed, 1 to remove and 81 not upgraded.
After this operation, 62.1 MB disk space will be freed.
Do you want to continue? [Y/n] u^H^H^H
Abort.
root@yrserver:/# dpkg -l | grep mysql
ii  mysql-client-core-8.0                  8.0.43-0ubuntu0.22.04.2                 amd64        MySQL database core client binaries
root@yrserver:/# apt-get remove --purge mysql-client-core-8.0 
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages were automatically installed and are no longer required:
  libcgi-fast-perl libcgi-pm-perl libclone-perl libencode-locale-perl libevent-pthreads-2.1-7 libfcgi-bin
  libfcgi-perl libfcgi0ldbl libhtml-parser-perl libhtml-tagset-perl libhtml-template-perl libhttp-date-perl
  libhttp-message-perl libio-html-perl liblwp-mediatypes-perl libmecab2 libprotobuf-lite23 libtimedate-perl
  liburi-perl mecab-ipadic mecab-ipadic-utf8 mecab-utils
Use 'apt autoremove' to remove them.
The following packages will be REMOVED:
  mysql-client-core-8.0*
0 upgraded, 0 newly installed, 1 to remove and 81 not upgraded.
After this operation, 62.1 MB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 129849 files and directories currently installed.)
Removing mysql-client-core-8.0 (8.0.43-0ubuntu0.22.04.2) ...
Processing triggers for man-db (2.10.2-1) ...
root@yrserver:/# dpkg -l | grep mysql
root@yrserver:/# rm -rf /etc/mysql/
root@yrserver:/# rm -rf /var/log/mysql
root@yrserver:/# rm -rf /var/log/mysql


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