Bluetooth devices (mouse / headphones) not reconnecting automatically
You might end up in a situation where your Bluetooth devices do not re-connect automatically. The solution is: 1) apt remove blueberry -y && apt
Operating Systems
How to set up SNMP for CentOS
Background This guide explains how to install SNMP on CentOS. Procedure Install the core library. Please note, this excludes snmpwalk: yum install net-snmp Later in
How can you see how many virtual CPUs / vCPU cores is on a VPS Hosted server?
Background It’s really useful to see how many virtual CPUs (vCPU) cores you have when you’ve just upgraded your VPS hosting. Use the command below
What is my IP address? How can I determine my IP address reliably from the command line using Linux?
Introduction This article explains how to get the IP address of a computer as viewed from the outside. The reason why you might want to
Where is killall on CentOS?
Help! My CentOS server is running away from me and I can’t find killall! Where is killall? Use pkill process instead, e.g. pkill apache2 Reference:
Bind fails but no log file that show anything
Your named server suddenly stops working. You go into a mild panic because restarting the service doesn’t show you where it’s failing. It’s as if
Bind fails to start open: /etc/named.conf: permission denied
The log file shows: Mar 14 10:49:10 hostname named[30884]: using 4 UDP listeners per interface Mar 14 10:49:10 hostname named[30884]: using up to 21000 sockets Mar 14
How to vacuum journalctl
How to free up space if your Linux journal (combined log file) is taking up a lot of space On some systems /var/log might be
How to sort a Linux directory by date
Use the following flags to order a directory listing by date in forward order: ls -lat To show a directory listing in reverse order, use
How to update the hostname on a Debian system
Try this command first too change your hostname: hostnamectl set-hostname newhostname Exit the terminal, and come back in. If that doesn’t work, also check the