When changing glibc versions, it's possible to end up with corrupt indexes in PostgreSQL. Are My Indexes Affected?
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.
In production, you (or your ops team) should configure a maximum number of bytes that Redis can use to store...
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...
Create htpasswd entry and print to stdout: $ sudo apt install apache2-utils # Optional $ htpasswd -n $USERNAME New password:
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...
Bash stores the exitcodestatus of piped commands in the environment variable PIPESTATUS So you can just echo ${PIPESTATUS[@]} to get...
Install and configure the AWS Command Line Interface Show existing certificates to test if the AWS Cli is working:
I'm creating certificate requests with this command: openssl req -new -out www.example.com.csr -keyout www.example.com.key -newkey rsa:2048 -nodes
Create a 1 GB file to swap to (we have sufficient space on / on this machine. Use a different partition...
The way MySQL's FULLTEXT tokenizer splits text into word tokens might not always be what you need. E.g. it...
This is a way to run multiple redis server on one ubuntu server. These steps you have to do only...
This card explains how to install RubyMine for the first time. If you want to upgrade an existing RubyMine installation...