Su: warning: cannot change directory to /nonexistent: No such file or directory

WSL2 터미널에서

아래 명령어로 Ubuntu 패키지를 업데이트합니다.

sudo apt update

아래 명령어로 mysql을 설치합니다.

sudo apt install mysql-server

설치확인하고 버전 번호를 확인합니다.

mysql --version

MySQL 시작

해당 명령어로 mysql을 실행합니다.

sudo /etc/init.d/mysql start

위 명령어를 실행한 후에

아래와 같은 에러가 발생한다면

su: warning: cannot change directory to /nonexistent: No such file or directory

아래와 같이 명령어를 실행해줍니다. (리눅스OS에 따라 상이)

# Ubuntu sudo service mysql stop sudo usermod -d /var/lib/mysql/ mysql sudo service mysql start# CentOS sudo systemctl stop mysql.service sudo usermod -d /var/lib/mysql/ mysql sudo systemctl start mysql.service

I do not know how to make Ubuntu 20.04 su behave like Ubuntu 18.04 su.

The difference is because in Ubuntu 20.04/Focal su is provided by the util-linux package. In Ubuntu 18.04/Bionic su is provided by the login package (built from the source package shadow).

root@ubuntu:~# lsb_release -r Release: 18.04 root@ubuntu:~# dpkg -S /bin/su login: /bin/su root@ubuntu:~# lsb_release -r Release: 20.04 root@ubuntu:~# dpkg -S /bin/su util-linux: /bin/su

A key implementation difference appears to be support for DEFAULT_HOME in /etc/login.defs. The manpage for Bionic's su mentions in its Configuration section

DEFAULT_HOME (boolean) Indicate if login is allowed if we can't cd to the home directory. Default is no. If set to yes, the user will login in the root (/) directory if it is not possible to cd to her home directory.

The manpage for Focal's version of su does not mention DEFAULT_HOME.

I found a few relevant entries in the changelog for the shadow package

* Use explicit --without-su configure flag -- Balint Reczey <> Fri, 20 Dec 2019 16:39:40 +0100 ... * Drop Lintian override for su, it is not shipped in login anymore -- Balint Reczey <> Mon, 08 Jul 2019 15:58:46 +0200 ... * Stop shipping su and break old util-linux version. (See #833256) -- Andreas Henriksson <> Fri, 27 Jul 2018 10:07:37 +0200

It looks like the change was made upstream in Debian and coordinated in //bugs.debian.org/cgi-bin/bugreport.cgi?bug=833256 . The lack of DEFAULT_HOME support is mentioned but is not considered a blocker.

标签：数据库 mysql

这种错误一般是 mysql 服务器异常关机导致的，解决方案如下：

# Ubuntu
sudo service mysql stop sudo usermod -d /var/lib/mysql/ mysql sudo service mysql start

# CentOS sudo systemctl stop mysql.service sudo usermod -d /var/lib/mysql/ mysql sudo systemctl start mysql.service

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标签：service No sudo stop var start cannot mysql directory

这种错误一般是 mysql 服务器异常关机导致的，解决方案如下：

# Ubuntu
sudo service mysql stop sudo usermod -d /var/lib/mysql/ mysql sudo service mysql start# CentOS sudo systemctl stop mysql.service sudo usermod -d /var/lib/mysql/ mysql sudo systemctl start mysql.service

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来源： //www.cnblogs.com/cnwcl/p/13805643.html

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