关于错误提示127的解决 以下是错误提示：
正在设置 mysql-server-5.7 (5.7.26-0ubuntu0.18.04.1) ... /var/lib/dpkg/info/mysql-server-5.7.postinst: 行 191: /usr/share/mysql-common/configure-symlinks: 没有那个文件或目录 dpkg: 处理软件包 mysql-server-5.7 (--configure)时出错： installed mysql-server-5.7 package post-installation script subprocess returned error exit status 127 dpkg: 依赖关系问题使得 mysql-server 的配置工作不能继续： mysql-server 依赖于 mysql-server-5.7；然而： 软件包 mysql-server-5.7 尚未配置。 dpkg: 处理软件包 mysql-server (--configure)时出错： 依赖关系问题 - 仍未被配置 因为错误消息指示这是由于上一个问题导致的错误，没有写入 apport 报告。 正在处理用于 libc-bin (2.27-3ubuntu1) 的触发器 ... 在处理时有错误发生： mysql-server-5.7 mysql-server E: Sub-process /usr/bin/dpkg returned an error code (1)执行一下语句
# sudo rm /var/lib/mysql/ -R # sudo rm /etc/mysql/ -R # sudo apt-get autoremove mysql* --purge # sudo apt-get install mysql-server mysql-common会发现错误提示变成了126，还是解决不了问题， 个人感觉还是配置文件出了问题，于是打开配置文件
root@asimco-ThinkPad-X230:~# sudo nano /etc/mysql/mysql.conf.d/mysqld.cnf就是这行在作妖 bind-address = 127.0.0.1 给他注释掉即可（前面加#），保存Ctrl+O，确定Enter并退出Ctrl+X。
root@asimco-ThinkPad-X230:~# sudo nano /etc/mysql/mysql.conf.d/mysqld.cnf user = mysql pid-file = /var/run/mysqld/mysqld.pid socket = /var/run/mysqld/mysqld.sock port = 3306 basedir = /usr datadir = /var/lib/mysql tmpdir = /tmp lc-messages-dir = /usr/share/mysql skip-external-locking # # Instead of skip-networking the default is now to listen only on # localhost which is more compatible and is not less secure. bind-address = 127.0.0.1 # # * Fine Tuning # key_buffer_size = 16M max_allowed_packet = 16M thread_stack = 192K，再执行一遍上面的步骤 即
# sudo rm /var/lib/mysql/ -R # sudo rm /etc/mysql/ -R # sudo apt-get autoremove mysql* --purge # sudo apt-get install mysql-server mysql-common进行到这一步，进程有可能会卡死（我的卡死了）， 我解锁了也没用
# sudo rm /var/cache/apt/archives/lock # sudo rm /var/lib/dpkg/lock查找进程并杀死也没用
root@asimco-ThinkPad-X230:~# ps -e | grep apt 3814 pts/0 00:00:01 apt-get root@asimco-ThinkPad-X230:~# sudo kill 3814 root@asimco-ThinkPad-X230:~# sudo apt-get install mysql-server mysql-common E: 无法获得锁 /var/lib/dpkg/lock-frontend - open (11: 资源暂时不可用) E: 无法获取 dpkg 前端锁 (/var/lib/dpkg/lock-frontend)，是否有其他进程正占用它？ 只好重启 root@asimco-ThinkPad-X230:~# sudo reboot Connection closing...Socket close.重启后重新安装，竟然好了，看来还是配置文件的问题。
Welcome to Ubuntu 18.04.2 LTS (GNU/Linux 5.0.0-21-generic x86_64) * Documentation: https://help.ubuntu.com * Management: https://landscape.canonical.com * Support: https://ubuntu.com/advantage * MicroK8s 1.15 is out! Thanks to all 40 contributors, you get the latest greatest upstream Kubernetes in a single package. https://github.com/ubuntu/microk8s * Canonical Livepatch is available for installation. - Reduce system reboots and improve kernel security. Activate at: https://ubuntu.com/livepatch 0 个可升级软件包。 0 个安全更新。 Your Hardware Enablement Stack (HWE) is supported until April 2023. Last login: Wed Jul 17 11:23:42 2019 from 172.16.133.106 root@asimco-ThinkPad-X230:~# sudo ./setup-seafile-mysql.sh sudo: ./setup-seafile-mysql.sh：找不到命令 root@asimco-ThinkPad-X230:~# sudo netstat -tap | grep mysql root@asimco-ThinkPad-X230:~# sudo apt-get install mysql-server mysql-common E: dpkg 被中断，您必须手工运行 ‘sudo dpkg --configure -a’ 解决此问题。 root@asimco-ThinkPad-X230:~# sudo dpkg --configure -a 正在设置 mysql-server-5.7 (5.7.26-0ubuntu0.18.04.1) ... Renaming removed key_buffer and myisam-recover options (if present) Checking if update is needed. This installation of MySQL is already upgraded to 5.7.26, use --force if you still need to run mysql_upgrade Created symlink /etc/systemd/system/multi-user.target.wants/mysql.service → /lib/systemd/system/mysql.service. 正在设置 mysql-server (5.7.26-0ubuntu0.18.04.1) ... root@asimco-ThinkPad-X230:~# sudo netstat -tap | grep mysql tcp6 0 0 [::]:mysql [::]:* LISTEN 2020/mysqld root@asimco-ThinkPad-X230:~# mysql -u root -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 2 Server version: 5.7.26-0ubuntu0.18.04.1 (Ubuntu) Copyright (c) 2000, 2019, 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> quit; Bye root@asimco-ThinkPad-X230:~# dpkg --list|grep mysql ii mysql-client-5.7 5.7.26-0ubuntu0.18.04.1 amd64 MySQL database client binaries ii mysql-client-core-5.7 5.7.26-0ubuntu0.18.04.1 amd64 MySQL database core client binaries ii mysql-common 5.8+1.0.4 all MySQL database common files, e.g. /etc/mysql/my.cnf ii mysql-server 5.7.26-0ubuntu0.18.04.1 all MySQL database server (metapackage depending on the latest version) ii mysql-server-5.7 5.7.26-0ubuntu0.18.04.1 amd64 MySQL database server binaries and system database setup ii mysql-server-core-5.7 5.7.26-0ubuntu0.18.04.1 amd64 MySQL database server binaries root@asimco-ThinkPad-X230:~# sudo service mysql status ● mysql.service - MySQL Community Server Loaded: loaded (/lib/systemd/system/mysql.service; enabled; vendor preset: enabled) Active: active (running) since Thu 2019-07-18 13:37:00 CST; 1min 50s ago Process: 2018 ExecStart=/usr/sbin/mysqld --daemonize --pid-file=/run/mysqld/mysqld.pid (code=exited, status=0/SUCCESS) Process: 2008 ExecStartPre=/usr/share/mysql/mysql-systemd-start pre (code=exited, status=0/SUCCESS) Main PID: 2020 (mysqld) Tasks: 28 (limit: 4455) CGroup: /system.slice/mysql.service └─2020 /usr/sbin/mysqld --daemonize --pid-file=/run/mysqld/mysqld.pid 7月 18 13:36:59 asimco-ThinkPad-X230 systemd[1]: Starting MySQL Community Server... 7月 18 13:37:00 asimco-ThinkPad-X230 systemd[1]: Started MySQL Community Server. root@asimco-ThinkPad-X230:~# sudo service mysql start