You can use the curl command to check if a website is using gzip or deflate compression. The curl command will send an HTTP request to a website and display the headers in the response. You can then look for the Content-Encoding header to see if the website is using gzip or deflate compression. Here’s … Read more
To set Cache-Control: public, max-age headers for caching purposes in Lighttpd, you need to modify the configuration file. The default configuration file is usually located at /etc/lighttpd/lighttpd.conf. To set the Cache-Control headers, add the following to your Lighttpd configuration file: $HTTP[“url”] =~ “\.(gif|jpg|jpeg|png|css|js)$” { # set cache-control headers for static files add_header “Cache-Control” “public, max-age=31536000, … Read more
To copy only hidden dot files and directories using rsync, use the –include option with a pattern to match hidden files, and the –exclude option with a pattern to exclude all other files: rsync -av –include=’.*/’ –exclude=’*’ source_directory/ destination Here’s what each option does: -a (or –archive) is equivalent to -rlptgoD and preserves almost everything … Read more
You can use a combination of the sed, grep, and awk utilities to print lines that contain only 3 words. Here are examples of how you can do this using each utility: sed: The following sed command prints lines that contain exactly 3 words: sed -n ‘/\b\w\+\b \b\w\+\b \b\w\+\b/p’ file.txt grep: The following grep command … Read more
In Python, you can execute Unix/Linux commands using the subprocess module. The subprocess module allows you to spawn new processes, connect to their input/output/error pipes, and obtain their return codes. Here are some examples of how you can use the subprocess module to execute Unix/Linux commands in Python: Running a simple command: The following code … Read more
Both tar and rsync can be used to archive and preserve SELinux contexts, extended attributes, and ACLs when backing up or transferring files on a Linux system. Here’s how you can use each utility: tar: To preserve SELinux contexts, extended attributes, and ACLs when using tar, you can use the -p option, which preserves the … Read more
The atop utility is an advanced system and process monitor for Linux that provides detailed information about system resource utilization. To install atop on CentOS or Red Hat Enterprise Linux (RHEL), you can follow these steps: Add the EPEL repository: atop is not included in the default CentOS/RHEL repositories, so you’ll need to add the … Read more
Pandora is a popular music streaming service that is only available in the United States. To listen to Pandora in Europe or any other region outside the US, you will need to use a proxy service. A proxy service routes your internet traffic through a server located in the US, making it appear as if … Read more
To install the Python IDLE Integrated Development Environment (IDE) on a Linux operating system, you can use the package manager of your Linux distribution. Here are the commands for a few popular Linux distributions: On Fedora: sudo dnf install python3-tools On CentOS/RHEL: sudo yum install python3 On Ubuntu/Debian: sudo apt-get install idle3 Once the installation … Read more
To list the contents (files) of a package in Linux using yum, you can use the following command: yum list <package-name> This will show you a list of packages available in your repositories that match the specified package name. Once you have identified the correct package, you can use the following command to list the … Read more