makandra cards: makandra Operations (public cards) https://makandracards.com/operations Controlling multiple PostgreSQL installations on Debian/Ubuntu https://makandracards.com/operations/44752-controlling-multiple-postgresql-installations-debian Fri, 31 Mar 2017 08:26:54 +0200 card:44752 Migrate Redis data with RIOT https://makandracards.com/operations/622979-migrate-redis-data-riot Thu, 24 Oct 2024 12:04:00 +0200 card:622979 restart puppetserver after changing custom functions https://makandracards.com/operations/37037-restart-puppetserver-changing-custom-functions Wed, 25 Nov 2015 12:18:06 +0100 card:37037 Playbook: fetch container logs from journald https://makandracards.com/operations/541191-playbook-fetch-container-logs-journald Thu, 23 Mar 2023 13:41:20 +0100 card:541191 ACM certificate not showing up in CloudFront https://makandracards.com/operations/473863-acm-certificate-showing-cloudfront Fri, 14 Feb 2020 10:05:46 +0100 card:473863 Get information about current running passenger processes https://makandracards.com/operations/49204-get-information-current-running-passenger-processes Wed, 31 Jan 2018 13:28:14 +0100 card:49204 manual haproxy backend failover https://makandracards.com/operations/39129-manual-haproxy-backend-failover Tue, 22 Mar 2016 10:49:56 +0100 card:39129 Barman recovery fails with missing history file https://makandracards.com/operations/471488-barman-recovery-fails-missing-history-file Wed, 08 Jan 2020 15:26:58 +0100 card:471488 AWS connect to an EC2 serial console via aws cli https://makandracards.com/operations/625774-aws-connect-ec2-serial-console-via-aws-cli Tue, 21 Oct 2025 09:49:50 +0200 card:625774 Howto: Decode JWTs https://makandracards.com/operations/625652-howto-decode-jwts Tue, 16 Sep 2025 13:57:50 +0200 card:625652 Restoring old Postgres dumps with pg_restore v11 and higher https://makandracards.com/operations/411911-restoring-old-postgres-dumps-pg-restore-v11-higher Wed, 16 Oct 2019 14:17:30 +0200 card:411911 Find unmaintained packages with apt-forktracer https://makandracards.com/operations/517746-find-unmaintained-packages-apt-forktracer Tue, 25 Oct 2022 17:25:54 +0200 card:517746 tofu/terraform workspaces with terragrunt https://makandracards.com/operations/625277-tofu-terraform-workspaces-terragrunt Tue, 10 Jun 2025 13:06:30 +0200 card:625277 Running Docker Container with emulated Architecture https://makandracards.com/operations/625246-running-docker-container-emulated-architecture Wed, 28 May 2025 14:05:39 +0200 card:625246 wkhtmltopdf on your appserver https://makandracards.com/operations/625185-wkhtmltopdf-appserver Wed, 07 May 2025 13:23:56 +0200 card:625185 nginx proxy_hide_header when used in multiple contextes https://makandracards.com/operations/37315-nginx-proxy-hide-header-used-multiple-contextes Wed, 09 Dec 2015 21:12:41 +0100 card:37315 Howto prevent service restarts on Debian package upgrades https://makandracards.com/operations/625112-howto-prevent-service-restarts-debian-package-upgrades Thu, 24 Apr 2025 14:32:23 +0200 card:625112 Redis Sentinel manual failover https://makandracards.com/operations/41936-redis-sentinel-manual-failover Tue, 16 Aug 2016 11:02:56 +0200 card:41936 Fix "double free or corruption (out)" https://makandracards.com/operations/624950-fix-double-free-corruption Mon, 17 Mar 2025 09:12:10 +0100 card:624950 HowTo: Add custom headers to docker client requests https://makandracards.com/operations/624835-howto-add-custom-headers-docker-client-requests Fri, 28 Feb 2025 07:49:47 +0100 card:624835 memcached: retreive connection information https://makandracards.com/operations/624632-memcached-retreive-connection-information Mon, 03 Feb 2025 10:50:17 +0100 card:624632 HowTo: Create scram-sha-256 password hash for use with postgres https://makandracards.com/operations/624558-howto-create-scram-sha-256-password-hash-postgres Thu, 30 Jan 2025 15:49:24 +0100 card:624558 Standardapplikationen in Ubuntu ändern https://makandracards.com/operations/624226-standardapplikationen-ubuntu-aendern Wed, 08 Jan 2025 12:55:48 +0100 card:624226 Useful PostgreSQL commands https://makandracards.com/operations/44561-useful-postgresql-commands Thu, 16 Mar 2017 16:43:09 +0100 card:44561 Repair broken etcd node https://makandracards.com/operations/48834-repair-broken-etcd-node Thu, 11 Jan 2018 16:04:23 +0100 card:48834 GitLab CI: debugging failed jobs https://makandracards.com/operations/616833-gitlab-ci-debugging-failed-jobs Mon, 15 Jan 2024 17:16:32 +0100 card:616833 BTRFS full disk encryption on Ubuntu 24.04 https://makandracards.com/operations/623848-btrfs-full-disk-encryption-ubuntu-24-04 Fri, 13 Dec 2024 14:43:22 +0100 card:623848 SSH: Fix host key verification error after makandra servers were upgraded to a new Ubuntu version https://makandracards.com/operations/485199-ssh-fix-host-key-verification-error-makandra-servers Mon, 07 Sep 2020 16:52:47 +0200 card:485199 Use chronic instead of redirecting cronjob output to /dev/null https://makandracards.com/operations/623799-chronic-instead-redirecting-cronjob-output-dev-null Tue, 10 Dec 2024 11:55:02 +0100 card:623799 Manually create Postgres password hash https://makandracards.com/operations/612033-manually-create-postgres-password-hash Fri, 10 Nov 2023 16:59:58 +0100 card:612033 AWS EC2: Burstable vs. Fixed-CPU Instances https://makandracards.com/operations/623494-aws-ec2-burstable-vs-fixed-cpu-instances Fri, 22 Nov 2024 13:22:25 +0100 card:623494 Don't use puppet `exec` type without `cwd` and `user` parameter https://makandracards.com/operations/39399-puppet-exec-type-cwd-user-parameter Tue, 05 Apr 2016 16:33:27 +0200 card:39399 Use Ubuntu 24.04 (Noble Numbat) with Vagrant https://makandracards.com/operations/623345-ubuntu-24-04-noble-numbat-vagrant Wed, 13 Nov 2024 09:39:54 +0100 card:623345 Pay attention to trailing slashes when using rsync https://makandracards.com/operations/499398-pay-attention-trailing-slashes-rsync Tue, 25 May 2021 11:59:19 +0200 card:499398 GitLab: Test Mailing from the Rails Console https://makandracards.com/operations/622556-gitlab-test-mailing-rails-console Fri, 13 Sep 2024 08:20:50 +0200 card:622556 Linux Memory Metrics https://makandracards.com/operations/622537-linux-memory-metrics Tue, 10 Sep 2024 10:59:45 +0200 card:622537 HowTo: switch to mise from asdf https://makandracards.com/operations/622347-howto-switch-mise-asdf Mon, 26 Aug 2024 10:29:16 +0200 card:622347 Do not use Python virtualenv anymore https://makandracards.com/operations/622273-python-virtualenv-anymore Tue, 20 Aug 2024 15:55:05 +0200 card:622273 Setup readonly rails console https://makandracards.com/operations/621937-setup-readonly-rails-console Tue, 06 Aug 2024 14:20:00 +0200 card:621937 Identify network cards for linux network interfaces https://makandracards.com/operations/621636-identify-network-cards-linux-network-interfaces Tue, 09 Jul 2024 09:25:32 +0200 card:621636 Set a fixed PGAPPNAME when using PgBouncer in transaction mode https://makandracards.com/operations/621416-set-fixed-pgappname-pgbouncer-transaction-mode Mon, 01 Jul 2024 23:45:58 +0200 card:621416 netfilter's Connection Tracking system (nf_conntrack) https://makandracards.com/operations/501292-netfilters-connection-tracking-system-nf-conntrack Thu, 01 Jul 2021 15:19:32 +0200 card:501292 Use sudo with rsync https://makandracards.com/operations/621022-sudo-rsync Mon, 10 Jun 2024 11:59:56 +0200 card:621022 VIA Macros for German Umlauts on US-ANSI keyboards https://makandracards.com/operations/619986-via-macros-german-umlauts-us-ansi-keyboards Fri, 05 Apr 2024 11:10:56 +0200 card:619986 Useful jq commands https://makandracards.com/operations/619924-useful-jq-commands Wed, 03 Apr 2024 16:59:26 +0200 card:619924 What are these numbers in /etc/fstab for? https://makandracards.com/operations/614748-numbers-etc-fstab Fri, 05 Jan 2024 16:13:54 +0100 card:614748 GitLab: Push without triggering CI Pipeline https://makandracards.com/operations/613031-gitlab-push-triggering-ci-pipeline Tue, 12 Dec 2023 10:06:55 +0100 card:613031 Use pg_repack to do a VACUUM FULL without holding an exclusive lock during processing https://makandracards.com/operations/613012-pg-repack-vacuum-full-holding-exclusive-lock-processing Mon, 11 Dec 2023 22:09:28 +0100 card:613012 HowTo apply Test Driven Development to Container Images https://makandracards.com/operations/612461-howto-apply-test-driven-development-container-images Wed, 22 Nov 2023 16:03:02 +0100 card:612461 HowTo Generate Nagios Config with puppet fast https://makandracards.com/operations/612213-howto-generate-nagios-config-puppet-fast Wed, 15 Nov 2023 14:49:35 +0100 card:612213