Batch update encoding (ubuntu)

batch_update_files_to_utf8.txt

// Install nkf
$ sudo apt install nkf


// Batch update all .html files inside current directory

// To UTF-8
$ find . -type f -name "*.html" -exec nkf -w --overwrite {} \;

// To SHIFT_JIS 半角が全角になる
$ find . -type f -name "*.html" -exec nkf -s --overwrite {} \;

// To SHIFT_JIS 半角がそのままでいい
$ find . -type f -name "*.html" -exec nkf -s -x --overwrite {} \;