A Linux administrator is deploying a Python application that includes a requirements.txt file to specify its dependencies. Which command should the administrator use to install all the packages listed in this file into the current environment?
The correct command to install Python dependencies from a file is pip install -r <filename>. The -r or --requirement flag tells pip to install packages from the given requirements file. Attempting to run pip install requirements.txt would incorrectly try to find and install a package named 'requirements.txt' from the Python Package Index (PyPI). pip load is not a valid command for this purpose. yum is a package manager for RPM-based Linux distributions and is not used for managing Python-specific packages from a requirements file; it manages system-level packages.
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What is `pip` used for in Python?
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What is the purpose of a `requirements.txt` file?
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Why is the `-r` flag important in the `pip install` command?
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