nkf:tldr:37519

The command "nkf -s ${filename-txt}" is used to convert the character encoding of a text file to Shift-JIS encoding. Here is a breakdown of each component:

• "nkf": This is the command-line utility nkf (Network Kanji Filter), which is responsible for converting the character encoding of text files.
• "-s": This option specifies the encoding scheme to be used for the conversion. In this case, it stands for Shift-JIS, a character encoding scheme commonly used for Japanese text.
• "${filename-txt}": This is a placeholder for the name of the text file you want to convert. It should be replaced with the actual file name and extension, such as "example.txt" or "data.txt". The ".txt" extension implies that it is a plain text file.

So, when you run this command with a specific text file name, it will convert the encoding of that file to Shift-JIS. The original file will remain unchanged, and a new file with the converted encoding will be created.