Introduction In the world of network administration, tcpdump stands out as a powerful tool for understanding network traffic. It’s like having a high-powered microscope for your network, allowing you to see the intricacies of what’s happening beneath the surface. This article will focus on a specific aspect of tcpdump: writing captured packets to a file …
DevOps
Disabling a specific repository while installing a package in Linux can be useful in various scenarios, such as avoiding packages from an untrusted or broken repository. The exact method depends on the package manager you are using. Here are methods for some of the most common package managers: APT (Debian, Ubuntu, and derivatives): Temporarily Disable …
To install a package from a specific repository in Linux, you typically use the package management system that comes with your distribution. The exact method can vary depending on the distribution (e.g., Ubuntu, Fedora, CentOS) and the package manager (e.g., apt, yum, dnf). Below are methods we have verified for some common distributions: For Debian/Ubuntu …
High CPU usage by certain processes can lead to system slowdowns, unresponsiveness, and in some cases, complete halts, making it essential for system administrators and power users to quickly identify and manage such processes. This article aims to provide readers with practical and easy-to-follow methods to pinpoint the processes that are utilizing the most CPU …
To list all the groups in a Linux system, various commands can be used based on the specific information required. Here are some common methods: Using the cat Command on /etc/group The /etc/group file in a Linux system contains information about groups and group memberships This plain text file contains one entry per line, each …
Managing user permissions and access rights is a fundamental aspect of system administration in Linux. In a multi-user environment, users are often assigned to groups to streamline the management of permissions. Groups in Linux are a powerful way to manage and control access to files, directories, and other system resources. However, there are instances where …
You can utilize systemd-logind configurations or set up a custom script to terminate idle sessions. Here are the two methods. We have verified on RHEL Linux. Using systemd-logind (For Systems with systemd) Edit logind.conf: Open the /etc/systemd/logind.conf file in a text editor. You’ll need administrative privileges to edit this file. sudo vi /etc/systemd/logind.conf Configure StopIdleSessionSec: …
The dict2items filter in Ansible is used to transform a dictionary into a list of key-value pairs. It’s particularly useful for iterating over a dictionary in playbooks or templates. Dict2items Basic Usage Define a Dictionary: Start with a dictionary that you wish to convert into a list of items. vars: my_dict: key1: value1 key2: value2 …
The set_fact module in Ansible is a vital tool used in playbooks to define or alter the value of variables during playbook execution. This dynamic nature of set_fact allows for greater flexibility and adaptability in managing configurations and automating tasks. With set_fact, you can create new variables on the fly based on the output of …
To fix the “no matching host key type found” error in SSH, you need to modify your SSH client configuration to accept the host key types offered by the SSH server. This error typically occurs when your SSH client does not support or is not configured to accept the host key types provided by the …