I have a Wordpress website that used to work fine, but recently I received the message "Error establishing a database connection" when trying to navigate to it. Upon researching online, I realized it may be related to changing my db password.
So I am following instructions on resetting the Mysql pw from here - https://www.digitalocean.com/community/tutorials/how-to-reset-your-mysql-or-mariadb-root-password.
Steps:
sudo systemctl stop mysql
sudo mysqld_safe --skip-grant-tables --skip-networking &
Output:
2019-08-25T15:23:22.702830Z mysqld_safe Logging to syslog.
2019-08-25T15:23:22.707805Z mysqld_safe Logging to '/var/log/mysql/error.log'.
2019-08-25T15:23:22.712056Z mysqld_safe Directory '/var/run/mysqld' for UNIX socket file don't exists.
I then do:
mkdir -p /var/run/mysqld
chown mysql:mysql /var/run/mysqld
and then run
sudo mysqld_safe --skip-grant-tables --skip-networking &
Output
2019-08-25T15:33:49.404761Z mysqld_safe Logging to syslog.
2019-08-25T15:33:49.411891Z mysqld_safe Logging to '/var/log/mysql/error.log'.
2019-08-25T15:33:49.443922Z mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
2019-08-25T15:33:49.992471Z mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
From here, I do mysql -u root, and see this
Output:
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
Troubleshooting done so far
To troubleshoot, I followed the suggestions from this post to find the sock file. I tried to do by by
sudo find / -type s to find the mysql.sock file, but do not find it in the list.
Output:
/run/acpid.socket
/run/dbus/system_bus_socket
/run/snapd-snap.socket
/run/snapd.socket
/run/uuidd/request
/run/user/0/systemd/private
/run/user/0/systemd/notify
/run/fail2ban/fail2ban.sock
/run/lvm/lvmpolld.socket
/run/lvm/lvmetad.socket
/run/systemd/journal/dev-log
/run/systemd/journal/socket
/run/systemd/journal/stdout
/run/systemd/journal/syslog
/run/systemd/private
/run/systemd/notify
/run/udev/control
/var/lib/lxd/unix.socket
/var/spool/postfix/private/proxywrite
/var/spool/postfix/private/relay
/var/spool/postfix/private/ifmail
/var/spool/postfix/private/retry
/var/spool/postfix/private/defer
/var/spool/postfix/private/maildrop
/var/spool/postfix/private/mailman
/var/spool/postfix/private/discard
/var/spool/postfix/private/anvil
/var/spool/postfix/private/scalemail-backend
/var/spool/postfix/private/bsmtp
/var/spool/postfix/private/bounce
/var/spool/postfix/private/verify
/var/spool/postfix/private/trace
/var/spool/postfix/private/uucp
/var/spool/postfix/private/lmtp
/var/spool/postfix/private/local
/var/spool/postfix/private/error
/var/spool/postfix/private/rewrite
/var/spool/postfix/private/proxymap
/var/spool/postfix/private/smtp
/var/spool/postfix/private/tlsmgr
/var/spool/postfix/private/scache
/var/spool/postfix/private/virtual
/var/spool/postfix/public/showq
/var/spool/postfix/public/qmgr
/var/spool/postfix/public/pickup
/var/spool/postfix/public/cleanup
/var/spool/postfix/public/flush
/var/spool/postfix/dev/log
I tried to restart the server by sudo service mysql start but got this output
Job for mysql.service failed because the control process exited with error code. See "systemctl status mysql.service" and "journalctl -xe" for details.
The output for systemctl status mysql.service is
mysql.service - MySQL Community Server
Loaded: loaded (/lib/systemd/system/mysql.service; enabled; vendor preset: enabled)
Active: activating (start-post) (Result: exit-code) since Sun 2019-08-25 15:41:53 UTC; 27s ago
Process: 16974 ExecStart=/usr/sbin/mysqld (code=exited, status=1/FAILURE)
Process: 16966 ExecStartPre=/usr/share/mysql/mysql-systemd-start pre (code=exited, status=0/SUCCE
Main PID: 16974 (code=exited, status=1/FAILURE); : 16975 (mysql-systemd-s)
Tasks: 2
Memory: 5.1M
CPU: 331ms
CGroup: /system.slice/mysql.service
└─control
├─16975 /bin/bash /usr/share/mysql/mysql-systemd-start post
└─17042 sleep 1
Aug 25 15:41:53 keshinpoint systemd[1]: Starting MySQL Community Server...
Aug 25 15:41:53 keshinpoint systemd[1]: mysql.service: Main process exited, code=exited, status=1/F
The output for journalctl -xe is
-- Unit mysql.service has finished shutting down.
Aug 25 21:08:08 keshinpoint systemd[1]: Starting MySQL Community Server...
-- Subject: Unit mysql.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit mysql.service has begun starting up.
Aug 25 21:08:08 keshinpoint audit[7730]: AVC apparmor="DENIED" operation="open" profile="/usr/sbin/
Aug 25 21:08:08 keshinpoint audit[7730]: AVC apparmor="DENIED" operation="open" profile="/usr/sbin/
Aug 25 21:08:08 keshinpoint audit[7730]: AVC apparmor="DENIED" operation="open" profile="/usr/sbin/
Aug 25 21:08:08 keshinpoint kernel: audit: type=1400 audit(1566767288.456:105247): apparmor="DENIED
Aug 25 21:08:08 keshinpoint kernel: audit: type=1400 audit(1566767288.460:105248): apparmor="DENIED
Aug 25 21:08:08 keshinpoint kernel: audit: type=1400 audit(1566767288.460:105249): apparmor="DENIED
Aug 25 21:08:08 keshinpoint systemd[1]: mysql.service: Main process exited, code=exited, status=1/F
Aug 25 21:08:38 keshinpoint systemd[1]: Failed to start MySQL Community Server.
-- Subject: Unit mysql.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit mysql.service has failed.
--
-- The result is failed.
Aug 25 21:08:38 keshinpoint systemd[1]: mysql.service: Unit entered failed state.
Aug 25 21:08:38 keshinpoint systemd[1]: mysql.service: Failed with result 'exit-code'.
Aug 25 21:08:38 keshinpoint systemd[1]: mysql.service: Service hold-off time over, scheduling resta
Aug 25 21:08:38 keshinpoint systemd[1]: Stopped MySQL Community Server.
-- Subject: Unit mysql.service has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit mysql.service has finished shutting down.
Aug 25 21:08:38 keshinpoint systemd[1]: Starting MySQL Community Server...
-- Subject: Unit mysql.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit mysql.service has finished shutting down.
Aug 25 21:08:38 keshinpoint systemd[1]: Starting MySQL Community Server...
-- Subject: Unit mysql.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit mysql.service has begun starting up.
Aug 25 21:08:38 keshinpoint audit[7815]: AVC apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/proc/7815/status" pid=7815 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=112 ouid
Aug 25 21:08:38 keshinpoint kernel: audit: type=1400 audit(1566767318.940:105250): apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/proc/7815/status" pid=7815 comm="mysqld" requested_m
Aug 25 21:08:38 keshinpoint audit[7815]: AVC apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/sys/devices/system/node/" pid=7815 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=
Aug 25 21:08:38 keshinpoint audit[7815]: AVC apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/proc/7815/status" pid=7815 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=112 ouid
Aug 25 21:08:38 keshinpoint kernel: audit: type=1400 audit(1566767318.948:105251): apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/sys/devices/system/node/" pid=7815 comm="mysqld" req
Aug 25 21:08:38 keshinpoint kernel: audit: type=1400 audit(1566767318.948:105252): apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/proc/7815/status" pid=7815 comm="mysqld" requested_m
Aug 25 21:08:39 keshinpoint systemd[1]: mysql.service: Main process exited, code=exited, status=1/FAILURE
Aug 25 21:08:44 keshinpoint kernel: [UFW BLOCK] IN=eth0 OUT= MAC=8e:96:82:1a:cc:9e:5c:45:27:78:fb:30:08:00 SRC=81.22.45.100 DST=174.138.62.216 LEN=40 TOS=0x00 PREC=0x20 TTL=245 ID=10892 PROTO=TCP SPT=4071
Aug 25 21:08:47 keshinpoint kernel: [UFW BLOCK] IN=eth0 OUT= MAC=8e:96:82:1a:cc:9e:5c:45:27:78:fb:30:08:00 SRC=51.81.7.101 DST=174.138.62.216 LEN=40 TOS=0x14 PREC=0x00 TTL=246 ID=54321 PROTO=TCP SPT=36258
Aug 25 21:08:53 keshinpoint sshd[7855]: Invalid user www from 51.38.186.228
Aug 25 21:08:53 keshinpoint sshd[7855]: input_userauth_request: invalid user www [preauth]
Aug 25 21:08:53 keshinpoint sshd[7855]: pam_unix(sshd:auth): check pass; user unknown
Aug 25 21:08:53 keshinpoint sshd[7855]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.186.228
Aug 25 21:08:56 keshinpoint sshd[7855]: Failed password for invalid user www from 51.38.186.228 port 60446 ssh2
Feels like a rabbit hole here. Can someone please help me with this? I would be grateful for any guidance offered, as Ive tried answers from multiple stackoverflow posts.
