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To delete directories on UNIX with special characters in their name or that are named after environment variables, you can use the following steps:

1. Use single or double quotes around the directory name or environment variable name to prevent any special characters from being interpreted by the shell.

Example: rm -r 'my[folder]' or rm -r "$HOME/my_folder"

1. Use the escape character "\" to escape any special characters.

Example: rm -r my\[folder\]

1. Use the "find" command to locate and delete the directory.

Example: find . -type d -name 'my[folder]' -exec rm -r {} \; or find "$HOME" -type d -name 'my_folder' -exec rm -r {} \;

Note: Use caution when using the "rm" command, as it permanently deletes files and directories without confirmation. Double-check the directory name or environment variable before executing the command.