If you want to check the configuration of a running JVM process you can use jcmd. List the running processes...
If you have for e.g. a Java application which outputs multiline stack traces inside a container running in kubernetes you...
To delete a specific redis-DB you need to use the FLUSHDB-command in combination with the SELECT-command. For...
To measure the time of your HTTP request with curl, you can use the -w (--write-out) option:
We had a strange behaviour on one of our mariadb-servers: Everyday at around midnight we saw that the root...
When changing glibc versions, it's possible to end up with corrupt indexes in PostgreSQL. Are My Indexes Affected?
When changing the glibc version, it's possible that the upgrade also includes changes to how locales work.
There are cases where we have multiple exported resources that are identical. There are nodes that provide the same services...
The Oracle mysql client has an odd behavior if your server uses latin1 as default character-set-server. Command
Nginx is capable of forwarding a unix socket to UDP backend servers. This is quite handy for load balance syslog...
You might use screen or tmux to run a temporary command on a server which continues to run after the...
When using many or very long entries of MIME-types that shoudl be gziped in gzip_types directives in nginx...
If the project you're working on has, say, 39 repositories and counting in GitLab and you need all the...
If your postgres database is only accessible from inside a kubernetes cluster, e.g. if it's configured in AWS RDS...
Here's a one-liner to view base64 encoded secrets in kubernetes. Make sure you have jq installed.
There's a simple way in bolt to run commands from a file without caring about BASH escaping: # /home/user/foo.sh
In our monitoring, RabbitMQ queues like aliveness-test may show up as unresponsive, with a ping timeout after 10 seconds...
Instead of using Puppet exported resources you can use the puppetdb_query feature. This can result in more complex code...
If you want to expand your Areca Raid by swapping out the disks for larger ones you will need to...
When you get this error message from e.g. loginctl show-user [...] after you deleted a user from your system:
What is netfilter's Connection Tracking system? The connection tracking system often referenced as nf_conntrack is part of the...
Systemd's networkd will drop IP-Addresses configured by other processes like Keepalived's VRRP, when it is restarted. This...
Getting the whole bucket size aws s3 ls s3://$BUCKETNAME/ --recursive --human-readable --summarize | tail -n2 Tail is used because...
Important If your railscomplete-deployment uses the net-ssh-gem please ensure you use version 5.2.0 or newer to ensure...