How to display block devices

Quickly list specific block devices.

How to inspect mount options

Inspect mount options for specific mountpoint or device.

How to display systemd journal since system boot

Display systemd journal since system boot.

How to display basic computer information using DMI table decoder

Display basic computer information using DMI table decoder.

How to install user-friendly alternative to find

Install fd as a simple and user-friendly alternative to find.

How to configure Wake-on-LAN using systemd

Configure Wake-on-LAN using systemd.

How to manage command history using text-based user interface

Manage command history using text-based user interface.

How to install and configure NTP server

Install and configure chrony NTP server.

How to display active but disabled systemd services

Display active but disabled systemd services.

How to access service socket as a regular user

Create an exception for a regular user to access service socket using systemd.

How to configure persistent DNS resolver

Configure persistent DNS resolver using systemd resolver or name server information handler.

How to use Dynamic Firewall Manager

Use Dynamic Firewall Manager to configure a basic zone-based firewall.

How to noninteractively configure system locales

Noninteractively configure system locales.

How to create watchdog for systemd service

Create a software watchdog for systemd service.

How to determine fastest server using ICMP

Determine fastest server using the Internet Control Message Protocol (ICMP).

How to alter date format when listing cached Kerberos tickets

Alter date format when listing cached Kerberos tickets.

How to reload network configuration

Reload network configuration on Debian Bullseye.

How to create Virtual eXtensible Local Area Network interfaces

Create and configure Virtual eXtensible Local Area Network interfaces.

How to install recent kernel using experimental Debian distribution

Install the most recent kernel using experimental Debian distribution to see what is coming up.

How to display systemd journal for specific service since it started

Display systemd journal for specific service since it started.

How to follow data appended to a file using tail command

Follow data appended to a file using one of the two possible approaches.

How to determine when service was started and stopped using the systemd journal

Determine when the service was started and stopped using the systemd journal.

How to display boot times and uptime using systemd journal

Display when the operating system was booted and calculate uptime using the systemd journal.

How to read QR Code from an image

Read QR Code from an image.

How to generate QR Code to access the Wi-Fi network

Generate QR code to access the Wi-Fi network.

How to provide custom TXT records in CHAOS class using BIND9

How to provide custom TXT records in class 3 (CHAOS) using BIND9.

How to specify the exact list of enabled PAM profiles

Specify the exact list of enabled PAM profiles using a simple workaround.

How to configure SSH access using Samba Active Directory

Configure SSH access using Samba Active Directory.

How to create Samba Active Directory server

Create Samba Active Directory server using Debian Bullseye.

How to fix failed dynamic DNS update with Samba Active Directory and System Security Services Daemon

Fix failed dynamic DNS update with Samba Active Directory and System Security Services Daemon by upgrading internal Samba DNS to BIND.

How to determine fastest APT server using the ICMP

Determine fastest APT server using the Internet Control Message Protocol (ICMP).

How to determine mountpoint filesystem type

Determine mountpoint filesystem type using core stat utility which is expected to exist on every operating system.

How to install a tiny and unobtrusive terminal file manager

Install n³ a tiny and unobtrusive terminal file manager that will accompany you in your daily tasks.

How to display current bandwidth grouped by a process

Use nethogs utility to display current bandwidth grouped by a process

How to delay the start of the systemd service

Delay the start of the systemd service at boot.

How to colorize command output

Colorize command output using grc a generic colouriser.

How to perform basic operations on zip archives

Perform basic operations on zip archives.

How to use multi-stage build to compile an application

Use Docker or Pod Manager multi-stage build to compile Nginx from source code with additional headers-more-nginx-module module using Debian Bullseye image.

How to handle low memory conditions on desktop

Handle low memory conditions on desktop using a nohang a sophisticated low memory handler for Linux in Python.

How to keep a list of permanent ARP entries

Keep a list of permanent ARP entries using the arp utility.

How to use LVM thin provisioning

Configure and use LVM thin provisioning.

How to use tmpfs for temporary directory

How to use tmpfs for temporary directory (/tmp).

How to resize live tmpfs filesystem

Resize live tmpfs filesystem.

How to align simple MariaDB output

Use column utility to align simple MariaDB output like variable list.

How to inspect and improve docker image using dive utility

Inspect and improve docker image using dive utility for exploring each layer in a docker image.

How to install and configure a Kafka cluster without ZooKeeper

Install and configure a Kafka cluster without ZooKeeper to play with it.

How to generate Kafka cluster ID

Generate Kafka cluster ID for Kafka Raft metadata mode.

How to relay all mail to external account

Relay all mail to an external account which can come in handy in your lab environment.

How to protect Samba DNS server against DNS zone transfer

Debian Bullseye currently provides Samba 4.13.5. Using BIND as Samba Active Directory DNS backend opens it to the DNS zone transfer.

How to pretty-print text files inside terminal

Pretty-print text files inside terminal using bat a cat clone with syntax highlighting and Git integration.

How to install SmokePing on Debian Bullseye

Keep track of network latency using SmokePing on Debian Bullseye.

How to limit the number of available processors

Use boot parameters to limit the number of available processors.

How to install DNS lookup utility

Install DNS lookup utility to perform basic DNS lookups.

How to install Cluster Manager for Apache Kafka

Install Cluster Manager for Apache Kafka, previously known as Kafka Manager on Debian Bullseye.

How to determine which SSH public key was uploaded to the web service

Determine which SSH public key was uploaded to the web service.

How to display IP address in a more readable format

Display IP address in a more readable format.

How to create Hadoop cluster

Create a basic Hadoop cluster to play with it.

How to configure MariaDB to log slow queries

Configure MariaDB server to log slow queries.

How to parse apt history log

Use awk to parse apt history log and filter it.

How to concatenate regular and gzip compressed files

Concatenate regular and gzip-compressed files at the same time.

How to increase the maximum permitted connections to MariaDB server

Increase the maximum permitted number of simultaneous connections to the MariaDB server.

How to load time zone tables into MariaDB server

Load time zone tables into MariaDB server.

How to log systemd service state changes

Log systemd service state changes using rsyslog.

How to display current date-time in different timezone

Use date utility to display current date time in different timezone

How to get service PID using systemctl

Use systemctl to get process identifier for specified service.

How to wipe partition-table signatures with one exception

Today I will extend the how to fix device excluded by a filter blog post to include information on how to wipe filesystem or partition-table signatures except for LVM2 members, which is a great idea for automation.

How to write an operating system to microSD card using graphical user interface

Write an operating system to microSD card using Raspberry Pi Imaging Utility.

How to create the simplest possible nftables firewall

Create the simplest possible firewall using nftables framework with relaxed rules that will allow all outgoing traffic, incoming ICMP echo requests, and ssh connections.