on the bash (issued as postgres user) Start/Stop/Restart PostgreSQL pg_ctl -D $configdir start|stop|restart Start/Stop/Restart the corresponding PostgreSQL...
If you're trying to start a cloud-init based Ubuntu VM with KVM you will suffer long boot times...
Hint You're not able to control which redis replica will chosen for the failover. Connect to your sentinel instance...
Because systemd is the greatest thing ever it's not enough to stop the libvirt service. You need to disable...
When receiving a new SSL-Certificate for an existing SSL-key it should be checked that they match cryptographically.
You will need to look here and find your own device. Look for the "bootable CD" download, which will give...
To see all jails: fail2ban status Our $JAIL is usually ssh. To see which IPs are banned currently: fail2ban-client...
Don't use exec without user parameter If you use exec without user parameter, the command will get executed as...
If you want to perform a failover on another haproxy backend server this is the way you should do it...
If you try to restart you may encouter the problem that your networking connection gets shutdown but not start again...
Brendan Gregg is the Linux performance god. Use the information in this link to find out what ways there are...
We want to make the following firewall rule to be applyable to different network interfaces (for e.g. different environments...
The puppet server caches custom functions. If you edit an existing function (e.g. while you’re developing it), you’ll...
If you need the debug output of the puppetmaster running with passenger you have to uncomment this setting in the...
Investigate why mails are frozen The exim documentation says: Freezing occurs when a bounce message encounters a permanent failure because...
Like Railscasts or Ruby Tapas, but for Linux.
swaks is a very nice tool to test SMTP. For the most linux distributions you can easily install it with...
Install and configure the AWS Command Line Interface Show existing certificates to test if the AWS Cli is working:
Create a 1 GB file to swap to (we have sufficient space on / on this machine. Use a different partition...
This is a way to run multiple redis server on one ubuntu server. These steps you have to do only...
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WordPress websites have always been a favourite for all types of clients because of its simplicity and easy of use...
Max Swahn attended the University of Pittsburgh, Swanson School of Engineering. He graduated in 2018 with a degree in Industrial...