To use grep to include only *.txt file patterns when running in recursive mode, you can use the -r option to specify recursive search and the –include option to specify the file pattern to include. For example: grep -r ‘pattern’ –include=’*.txt’ /path/to/directory This will search for the string pattern in all *.txt files under the … Read more

To check the swap usage size and utilization in Linux, you can use the free command with the -h option to display the output in human-readable format. free -h The output will show the total amount of swap memory, used swap memory, and free swap memory, as well as other information about the system’s memory … Read more

The error “Fatal error: Python.h: No such file or directory” usually occurs when you’re trying to build a Python extension or module and the required header files are not present on the system. To resolve this issue, you need to install the development files for Python. On Debian-based systems like Ubuntu, you can install the … Read more

To find information about installed packages on a Debian-based system such as Ubuntu, you can use the apt-cache command. For example, to find information about the python3 package, you can run the following command: apt-cache show python3 This will display detailed information about the package, including its name, version, description, dependencies, and more. You can … Read more

To download a compressed file using wget and send the gzip headers, you can use the following command: wget –header=’Accept-Encoding: gzip’ <URL> Replace <URL> with the URL of the file you want to download. The –header option allows you to specify an HTTP header to be sent in the request. In this case, the header … Read more

To redirect an old domain to a new domain using an HTTP 301 redirect in Nginx, you can add the following code to your Nginx configuration file: server { listen 80; server_name olddomain.com; return 301 $scheme://newdomain.com$request_uri; } This code will redirect all traffic from olddomain.com to newdomain.com with a permanent HTTP 301 redirect. The $scheme … Read more

To install the pip client on Linux, you can use the package manager for your distribution. Here are the commands for some popular distributions: For Debian/Ubuntu: sudo apt-get install python-pip For Fedora: sudo dnf install python-pip For CentOS/RHEL: sudo yum install epel-release sudo yum install python-pip After you have installed pip, you can use it … Read more

The ssh-keygen command is used to create SSH keys, which are used to authenticate an SSH client to an SSH server. To create a host key file, you can use the ssh-keygen command with the -t option to specify the type of key you want to generate and the -f option to specify the output … Read more

Rackspace Cloud Files can be accessed using FTP (File Transfer Protocol). Here are the steps to upload files using the FTP command on Linux/Unix: Install the ftp command line client if it is not already installed. You can install it using your operating system’s package manager. Connect to the Rackspace Cloud Files FTP server using … Read more

To upgrade a package using pip, you can use the pip install command with the –upgrade or -U option. For example, to upgrade the requests package: pip install –upgrade requests You can also upgrade all packages to their latest version by using the following command: pip freeze –local | grep -v ‘^\-e’ | cut -d … Read more