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 …

Adding a user to multiple groups in Linux can be done using the usermod command. Here’s a step-by-step guide: using usermod Command to add a user to Multiple Groups To add a user to multiple groups, use the -G option followed by a comma-separated list of the groups: sudo usermod -G group1,group2,group3 username Replace group1,group2,group3 …

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: …

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The error message “SSL: SSLV3_ALERT_CERTIFICATE_EXPIRED” indicates that the server you’re trying to connect to has an expired SSL certificate. This can cause issues when accessing websites, using APIs, or connecting to any secure service that relies on SSL/TLS for encryption. Here’s a detailed guide on how to fix this error, step-by-step: Verify the Certificate Expiry …

In Linux, you can manipulate strings using various commands and tools. To subtract or extract parts of a string, you might use tools like cut, awk, or string manipulation in scripting languages like Bash or Python. Extract Characters or Substrings in Linux Let’s say you have a string “Hello World” and want to extract the …

The Excel COUNTIF function is a powerful tool for counting cells that meet specific criteria within a range. Often overlooked is its ability to count cells not equal to a particular value. This functionality provides an efficient way to assess the number of cells that don’t match a specific criterion. Excel COUNTIF Function: Count Cells …

COUNTIF is a powerful tool that counts the number of cells within a specified range that meet a certain condition. It’s like asking Excel, “How many times does X appear within this group of cells?” Here’s how to use COUNTIF to count cells greater than a certain number in Excel: Syntax: =COUNTIF(range, “>number”) Steps: Open …

Formatting in Excel is an important aspect that helps make your data more visually appealing and easier to understand. In addition, formatting can also help improve the readability of your Excel tables. One easy way to apply formatting in Excel is by using the Ctrl+Q shortcut. In this article, we will learn how to use …