Follow The Geek Diary, filter it, and define how you want to receive the news (via Email, RSS, Telegram, WhatsApp etc.) https://follow.it/the-geek-diary Mon, 26 Sep 2022 10:36:33 +0200 https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX7kwqtswOpHMqbel3Iu4GjH Linux distributions are moving away from their old System V-style startup processes to a newer mechanism, the systemd daemon, and its associated systemctl command-line tool. Services managed by systemd/systemctl require, at a minimum, a configuration file that defines startup and shutdown processes, a type definition that controls how those processes will be handled by the […]]]> Sat, 24 Sep 2022 13:54:05 +0200 https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX7kwqtswOpHMqbel3Iu4GjH https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX5--BGbM4gQEt6jHbRcHw3s Vim is a powerful text editor and knowing how to use it is an important thing for any system administrator. Nevertheless, there are other text editors that are equally powerful and even easier to use. This is the case with nano, which is installed by default in Ubuntu and CentOS and can be used right […]]]> Sat, 24 Sep 2022 07:28:21 +0200 https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX5--BGbM4gQEt6jHbRcHw3s https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX4MUWn-jCovmlw3HFUzDTIP The partprobe command is normally needed only in situations where the partition table has changed and the system needs to be informed of the changes. The most common example is when you use the fdisk command to change a partition on a device that currently has mounted filesystems. The fdisk command attempts to inform the […]]]> Sat, 24 Sep 2022 06:35:22 +0200 https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX4MUWn-jCovmlw3HFUzDTIP https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX6c4PwAD7a9WDErtZyObPkc The purpose of Firewalld is to replace the need for iptables and improve security management by enabling configuration changes without stopping the current connections. Firewalld runs as a daemon that allows for rules to be added and changed instantly and it uses network zones to define a level of trust for any and all associated […]]]> Sat, 24 Sep 2022 06:01:28 +0200 https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX6c4PwAD7a9WDErtZyObPkc https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX4KopsNnecg1O4DA87rvhPr SELinux can either be in an enabled or a disabled state. In order to check in which state it is running, we can make use of the getenforce command. There are two modes in which SELinux runs: There are two modes in which SELinux runs: Enforcing: This is the enabled state where all rules are […]]]> Fri, 23 Sep 2022 16:46:28 +0200 https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX4KopsNnecg1O4DA87rvhPr https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX5odDU9VtVnIq8qfTAM-Smm jarsigner adds a digital signature to the specified jarfile, or, if the -verify option is specified, it verifies the digital signature or signatures already attached to the JAR file. The specified signer is a case-insensitive nickname or alias for the entity whose signature is to be used. The specified signer name is used to look […]]]> Wed, 21 Sep 2022 06:47:09 +0200 https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX5odDU9VtVnIq8qfTAM-Smm https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX4hXHn-XHnLjABC78OgjhDM Neovim can be used as a drop-in replacement for Vim. Neovim is a fork of Vim, that branched out into its own thing in 2014. Neovim aims to address a few core issues about Vim: Working with a 30-year-old code base while maintaining backward compatibility is hard. It’s very difficult to write certain kinds of […]]]> Mon, 19 Sep 2022 07:21:13 +0200 https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX4hXHn-XHnLjABC78OgjhDM https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX4o1ywv6nV1WzRQaTQYXBS9 There are many different approaches to audio players under Linux. Some players focus on minimalism, others focus on features, and some aim to provide similar functionality to a media player on another platform. Rhythmbox falls into the latter category, as it was created to provide an iTunes-like interface for audio under Linux. To play those […]]]> Mon, 19 Sep 2022 06:54:05 +0200 https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX4o1ywv6nV1WzRQaTQYXBS9 https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX4WD6A82iS-p3OFESPuQWsX Steam is a video game digital distribution service and storefront by Valve. It was launched as a software client in September 2003 as a way for Valve to provide automatic updates for their games and expanded to distributing and offering third-party game publishers’ titles in late 2005. You can install steam in ubuntu and enjoy […]]]> Mon, 19 Sep 2022 06:14:46 +0200 https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX4WD6A82iS-p3OFESPuQWsX https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX6gCDAfKhwJu4MOI2eu70Rg lsmod command lists all loaded modules: name, size (in 4 KB units), and, if appropriate, a list of referring modules. The same information is available in /proc/modules if the /proc directory is enabled on the system. The output of lsmod is a series of columns identifying the module name, size, use number, and status. A […]]]> Sat, 17 Sep 2022 10:18:03 +0200 https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX6gCDAfKhwJu4MOI2eu70Rg https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX6ZvYt2SeBrnzErtZyObPkc lspci command lists all Peripheral Component Interconnect (PCI) devices. This command has many options that are useful for debugging device drivers. If we just run lspci, we get a list of devices and their IDs: 00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02) 00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA […]]]> Sat, 17 Sep 2022 09:26:58 +0200 https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX6ZvYt2SeBrnzErtZyObPkc https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX6ZvYt2SeBrn93hDS9njgCr umount is the opposite of mount: it makes a disk partition unavailable. For instance, if you’ve mounted a CD-ROM disc, you can’t eject it until it’s umounted: $ umount /mnt/cdrom Always unmount removable media before ejecting it or you risk damage to its filesystem. To unmount all mounted devices: # umount -a Don’t unmount a […]]]> Sat, 17 Sep 2022 09:16:23 +0200 https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX6ZvYt2SeBrn93hDS9njgCr https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX6tSVlPnN_sLe9WSSr4-0sP Loopback filesystems are very interesting components of Linux-like systems. We usually create filesystems on devices (for example, disk drive partitions). These storage devices are available as device files such as /dev/device_name. In order to use the storage device filesystem, we mount it at a directory called a mount point . On the other hand, loopback […]]]> Fri, 16 Sep 2022 07:36:07 +0200 https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX6tSVlPnN_sLe9WSSr4-0sP https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX6dosKYrLkBkkQqW5gBv7mX The GNU Privacy Guard application allows you to encrypt and decrypt information, create public and private encryption keys, and use or verify digital signatures. GPG is based on the use of a pair of keys, one public and one private (or “secret”). Data encrypted with one key can only be decrypted with the other. To […]]]> Thu, 15 Sep 2022 15:07:39 +0200 https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX6dosKYrLkBkkQqW5gBv7mX https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX6Dqgh0fBwZaq7VFky8BpXO pstree command displays a hierarchical list of processes in a tree format. pstree is very handy for understanding how parent/child process relationships are set up. If the PID is specified, the displayed tree is rooted at that process. Otherwise, it is rooted at the init process, which has PID 1. If a user (a valid […]]]> Wed, 14 Sep 2022 17:07:53 +0200 https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX6Dqgh0fBwZaq7VFky8BpXO https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX5jtMyzL9fQPlw3HFUzDTIP lshw reports memory configuration, firmware versions, mainboard configuration, CPU version and speed, cache configuration, bus speed, hardware paths, attached devices, partitions, and filesystems. Try the lshw (Hardware Lister) command with no options, and store the output in a text file: $ sudo lshw | tee hardware.txt duchess description: Laptop product: Latitude E7240 (05CA) vendor: Dell […]]]> Wed, 14 Sep 2022 12:10:34 +0200 https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX5jtMyzL9fQPlw3HFUzDTIP https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX7OGeGgsQLZXnMq2h3ehXEp Many firewall solutions are available for Linux/Unix-based operating systems, such as Raspbian OS in the case of Raspberry Pi. These firewall solutions have IP tables underneath to filter packets coming from different sources and allow only the legitimate ones to enter the system. IP tables are installed in Raspberry Pi by default but are not […]]]> Wed, 14 Sep 2022 09:30:53 +0200 https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX7OGeGgsQLZXnMq2h3ehXEp https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX4eK8WiDrZcEKgzzHWHxDTV Uncomplicated firewall (UFW) provides easy-to-use interface for people unfamiliar with firewall concepts. It provides a framework for managing netfilter as well as the command-line interface to manipulate the firewall. With its small command set and plain English parameters, UFW makes it quick and easy to understand and set up firewall rules. At the same time, […]]]> Wed, 14 Sep 2022 09:19:05 +0200 https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX4eK8WiDrZcEKgzzHWHxDTV https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX49LWQbqMeRQgBC78OgjhDM The usermod command uses various options to modify the existing user account parameters. The usermod –help command will display the various options that can be used. The syntax of usermod is as follows: $ usermod -[option] [username] Command line options available with the usermod command are as follows: Option Description -a, –append Used with the […]]]> Wed, 14 Sep 2022 06:28:54 +0200 https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX49LWQbqMeRQgBC78OgjhDM https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX7h3gHdLrduQS3FFO_xyF25 envsubst substitutes environment variables in a shell string or script. When used with no options, copies stdin to stdout, replacing any environment variable string, such as $VARIABLE or ${VARIABLE}, with the appropriate environment variable value. So, “My editor is $EDITOR” would be converted to “My editor is /usr/bin/emacs.” Specifying a shell format limits the substitutions […]]]> Tue, 13 Sep 2022 16:06:40 +0200 https://api.follow.it/track-rss-story-click/v3/d7NmEXQ7LX7h3gHdLrduQS3FFO_xyF25