To rename a file extension from .OLD to .NEW in Unix or Linux, you can use the mv (move) command along with string substitution and a shell loop. Here is an example using a shell script: #!/bin/bash for f in *.OLD; do mv “$f” “${f%.OLD}.NEW” done This script will loop through all files with a … Read more
The /proc file system in Linux provides information about various aspects of the system such as system statistics, process information, and hardware configuration. To display system statistics gathered from /proc, you can use the ‘top’ or ‘free’ commands. The ‘top’ command provides real-time information about system usage, including CPU utilization, memory usage, and process information. … Read more
To configure a subdomain on Lighttpd, you need to add a new virtual host configuration for the subdomain in the Lighttpd configuration file. Here is the general process: Open the Lighttpd configuration file: sudo nano /etc/lighttpd/lighttpd.conf Add a new virtual host configuration for the subdomain: $HTTP[“host”] =~ “subdomain.example.com” { server.document-root = “/var/www/subdomain” } Replace “subdomain.example.com” … Read more
To display information about Ethernet bridges on a Linux system, you can use the brctl command. This command is used to configure and manage Ethernet bridges on the system. To display information about the Ethernet bridges on the system, you can use the following command: brctl show This will show information about each bridge, including … Read more
To run the Firefox web browser from the command line in Linux, simply open a terminal window and type “firefox” and hit enter. If the Firefox application is installed in a location that is not in your PATH, you will need to specify the full path to the binary, like this: /path/to/firefox You can also … Read more
To install firefox-4.0.tar.bz2 on Linux, follow these steps: Download the firefox-4.0.tar.bz2 archive file to your system by using wget or another method. Extract the archive file: tar xvjf firefox-4.0.tar.bz2 Change into the extracted directory: cd firefox Run the following commands to install Firefox: ./configure make sudo make install You can now run Firefox by typing … Read more
To run an external command from a Python script and capture its output, you can use the subprocess module. The subprocess module provides a convenient and flexible way to interact with the shell and run shell commands from your Python code. Here’s an example of how to run a shell command and capture its output: … Read more
The “ports” system in FreeBSD is a collection of scripts and makefiles that automate the process of downloading, building, and installing third-party software. To install ports in FreeBSD, follow these steps: Make sure that you have the necessary dependencies installed, such as the GCC compiler and the make utility. Update the ports tree by running … Read more
To install iptables firewall on Redhat or CentOS Linux, you need to use the following steps: Install iptables package: $ sudo yum install iptables-services Enable iptables service at boot time: $ sudo systemctl enable iptables Start iptables service: $ sudo systemctl start iptables Configure iptables rules: The iptables firewall rules can be set using the … Read more
To lock the desktop or screen on an Apple OS X system, you can use the following steps: Go to the Apple menu in the upper left corner of the screen and select “Sleep.” To lock the screen immediately, press “Control + Shift + Power” button or “Control + Shift + Eject.” You can also … Read more