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Ubuntu installed a fixed version of package

Filed under: Uncategorized — Mathz @ 18:44

Find all packages available

rmadison sudo

Install a specific version

sudo apt install sudo=1.8.31-1ubuntu1.2


NET::ERR_CERT_INVALID – Dockerfile docker-unifi-controller

Filed under: Hemsidor — Mathz @ 14:56

There’s a secret passphrase built into the error page. Just make sure the page is selected (click anywhere on the screen), and just type thisisunsafe.



Filed under: Uncategorized — Mathz @ 23:40

git clone

sudo docker build -t plejd2mqtt .

version: "3"
    image: plejd2mqtt:latest
    restart: always
      - /var/run/dbus:/var/run/dbus
      PLEJD_SITE: xxxxx
      PLEJD_USERNAME: xxxx
      PLEJD_PASSWORD: xxxx
      MQTT_BROKER: mqtt://mqtt


Change PHP version

Filed under: Config — Mathz @ 11:41
sudo update-alternatives --config php

There are 4 choices for the alternative php (providing /usr/bin/php).

  Selection    Path             Priority   Status
* 0            /usr/bin/php8.0   80        auto mode
  1            /usr/bin/php7.2   72        manual mode
  2            /usr/bin/php7.3   73        manual mode
  3            /usr/bin/php7.4   74        manual mode
  4            /usr/bin/php8.0   80        manual mode

Press <enter> to keep the current choice[*], or type selection number:


Move files in directory based on year

Filed under: Uncategorized — Mathz @ 23:24

for i in `ls -lrt | grep “2015”| awk ‘{print $9}’ `; do mv -f $i* /new/Archives.2015/; done


Update MYSQL database in Docker

Filed under: Uncategorized — Mathz @ 16:51
docker run --rm -ti -v <full patch to db-files>:/var/lib/mysql mysql:5.7 bash

You’ll see a command prompt inside the MySQL container. Run the following command:

mysqld_safe --skip-grant-tables &

MySQL will start up. Wait 10 seconds or so for that to happen, and then run the following. Note you won’t see a command prompt, so just type away and it will work!



NextCloud maintenance:mode

Filed under: Server — Tags: — Mathz @ 19:36

sudo docker exec -u www-data -it nextcloud /bin/bash or

sudo docker exec -u www-data -it nextcloud /bin/bash php /var/www/nextcloud/occ maintenance:mode –off

sudo docker exec –user www-data -it nextcloud /bin/bash
php occ maintenance:repair


Cpanel Eximstats corrupt database

Filed under: Server — Mathz @ 09:01


DBD::SQLite::st execute failed: database disk image is malformed at /usr/local/cpanel/Cpanel/EximStats/ line 388.


mv /var/cpanel/eximstats_db.sqlite3 /var/cpanel/eximstats_db.sqlite.old
/scripts/import_exim_data /var/log/exim_mainlog


Longhorn MountVolume.SetUp failed for volume “mysql-5721” : rpc error: code = Internal desc = mount failed: exit status 32 Mounting command: mount Mounting arguments: -t ext4 -o defaults /dev/longhorn/mysql-5721 /var/lib/kubelet/pods/9db5f7a0-d6dd-426d-89b1-bb7abf6a0ac4/volumes/ Output: mount: /var/lib/kubelet/pods/9db5f7a0-d6dd-426d-89b1-bb7abf6a0ac4/volumes/ /dev/longhorn/mysql-5721 already mounted or mount point busy.

Filed under: K8S,Server — Mathz @ 21:19

When there is problem to mount a Longhorn device this bug can be a good start:

Solution for me was add

blacklist {
   devnode "^sd[a-z0-9]+"

to /etc/multipath.conf and restart

service multipathd restart


Add SSL-cert to Java keystore on Ubuntu

Filed under: Server,Ubuntu — Mathz @ 12:08

Download cert in Chrome on MAC

  1. Open a new TextEdit document.
  2. In TextEdit, click Format | Make Plain Text.
  3. Arrange windows so that the TextEdit window and the Chrome window are both visible.
  4. In Chrome, click the icon to the left of the URL in the address bar.
  5. In the dropdown list, click Certificate.
  6. Hold down Option and drag from the large certificate icon to the body of the TextEdit document. Note: If you did not follow the steps above in exactly the order stated, you may need to first single-click within the Chrome window so that TextEdit doesn’t become hidden when you Option-click.
  7. Save the TextEdit document with a .pem extension.

Import cert to keystore

sudo keytool -import -alias <hostname> -keystore /usr/lib/jvm/java-1.8.0-openjdk-amd64/jre/lib/security/cacerts -file public.crt 

Default password for Java keystore is “changeit”.

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