Disclaimer

This should not be necessary in any case and is only for special cases, for e.g. if the assets directory is linked to a shared storage (for e.g. glusterfs). Please mind that it isn't wise to move your assets directory to a shared s...

Because systemd is the greatest thing ever it's not enough to stop the libvirt service. You need to disable the libvirt socket too.

sudo systemctl stop libvirt-bin
sudo systemctl stop libvirt-bin.socket
sudo systemctl start libvirt-bin

Example

collectd5 in version 5.9.0 is broken and you upgraded it everywhere. But because it's FreeBSD it does not restart running services. After every old version is removed from /var/cache/pkg you restarted collectd and it does not s...

It's quite confusing how many external displays are usable with a MacBook that uses an M1 or M2 Chip. Documentation on the Internet is sparse and not even the Geniuses at the Genius Bar are 100% sure. We found out some things and can explain the b...

Create a 1 GB file to swap to (we have sufficient space on / on this machine. Use a different partition if necessary)

sudo dd if=/dev/zero of=/var/swapfile bs=1M count=1024

If you prefer 2GB swap, chose count=2048, 4GB: count=4096

C...

Hint

This applies only to distributions based on Debian.

Requirement

You need to setup the PostgreSQL Apt Repository first.

If you have multiple Postgres versions install...

To see all jails:

fail2ban status

Our $JAIL is usually ssh.

To see which IPs are banned currently:

fail2ban-client status ssh

If you want to unban a host banned by fail2ban on Ubuntu 14.04 or later use this method:

If you want to perform a failover on another haproxy backend server this is the way you should do it:

Gather information

Via hatop

Note: Please mind that the names of frontends / backends / servers are only examples. Mind this when yo...

If you have a single node elasticsearch instance and indices with replicas enabled your cluster state will be yellow. If you have replica shards they should be moved to a different node for high availability purposes. With a single node this can't...