look:tldr:e499d

The command "look --ignore-case ${prefix} ${filename}" is used to search for lines in a sorted file that starts with a specific prefix, while ignoring the case sensitivity. Let's break it down:

• "look" is a command-line utility in Unix-like operating systems that is used to search for lines that begin with a specific character or string in a sorted file.
• "--ignore-case" is an option that is passed to the "look" command which instructs it to ignore the case sensitivity while performing the search. This means that the search will consider uppercase and lowercase letters as equal.
• "${prefix}" is a placeholder for a specific prefix. You need to replace "${prefix}" with the actual prefix you want to search for. For example, if you want to search for lines starting with "abc", you would replace "${prefix}" with "abc".
• "${filename}" is a placeholder for the name of the file in which you want to perform the search. You need to replace "${filename}" with the actual file name. For example, if the file you want to search is named "example.txt", you would replace "${filename}" with "example.txt".

In summary, the command searches for lines that start with a specific prefix in a sorted file, and it does so while ignoring the case sensitivity.