In CentOS and RHEL, you can list all configured repositories using the yum command-line tool. Here’s the command to list all the repositories: yum repolist all Explanation: The yum command is used to interact with the YUM (Yellowdog Updater, Modified) package manager, which is used to manage software packages on CentOS and RHEL systems. The … Read more

You can use the nginx status module to view active connections and connections per second for your Nginx server. The status module provides real-time information about the status and performance of your Nginx server. To view active connections and connections per second, you’ll need to access the status page provided by the status module. This … Read more

In Python 2, you can use the raw_input() function to read input from the keyboard. This function reads a line of text from the user and returns it as a string. Here’s an example of how to use raw_input() in Python 2: name = raw_input(‘Enter your name: ‘) print(‘Hello, ‘ + name + ‘!’) Explanation: … Read more

You can use the iptables command in Linux to list and show all NAT (Network Address Translation) rules. The NAT rules are stored in the nat table in the iptables firewall. Here’s an example of how to list all NAT rules in iptables: iptables -t nat -L Explanation: The -t option specifies the table to … Read more

You can use the os module in Python to delete or remove files. The os module provides the remove() function to delete a file. Here’s an example of how to delete a file in Python: import os filename = ‘file.txt’ if os.path.isfile(filename): os.remove(filename) print(f'{filename} was deleted successfully.’) else: print(f'{filename} was not found.’) Explanation: The first … Read more

You can use the find command in Linux/Unix to search for files that were modified on a specific date. The find command supports several options to specify the time and date range for the search. Here is an example of how to find files modified on a specific date (e.g., January 1, 2022) using the … Read more

To disable the default PDF viewer in Firefox, you can follow these steps: Open Firefox and type about:addons in the address bar and press Enter. In the Add-ons Manager, click on the “Plugins” tab. Find the plugin named “Portable Document Format (PDF)” in the list. Click on the “Never Activate” button to disable the plugin. … Read more

The nethogs tool is a free, open-source utility for Linux that allows you to see the bandwidth usage of individual processes on your system. It provides a real-time view of the network traffic generated by each process, including the process name, pid, and the amount of bandwidth used in kilobytes per second. Here’s how you … Read more

The pwd (Print Working Directory) command is used in Linux and Unix systems to print the current working directory. The current working directory is the directory where the shell is currently located. Here are some examples of how to use the pwd command: Basic usage: pwd This will print the full path of the current … Read more

When SELinux is preventing access to a file or resource, you can use the audit2allow command to generate a policy module that will allow the access. Here’s how you can resolve the issue of SELinux preventing /sbin/iptables-multi-1.4.7 from read access on the file/socket /rawip_socket in RHEL/CentOS: Find the SELinux denial message in the audit log: … Read more