Check line feed code 改行コードを調べる

ファイルエンコードの一括変換はこの記事の方法もありますが,以下の方が簡単でしょう.
Line feed code should be LF for linux text files and you can check using a command of “file” as follows:

$ file test.f90
test.f90: ASCII text # LF (Unix, Linux, MAC)
test.f90: ASCII text, with CRLF line terminators (Windows)
$ file *.f90  # check all the files with extension of f90

Convert to LF

Using nkf, you can convert from CRLF to LF:

$ nkf -Lu --overwrite test.f90  # to LF
$ nkf -Lw --overwrite test.f90  # to CRLF
$ nkf -Lu --overwrite *.f90     # all the files with the extension of f90 to LF

Check character code 文字コードを調べる

You can check character code using “nkf -g”:

$ nkf -g test.f90
  => Shift_JIS or EUC-JP or UTF-8

Convert to UTF-8

You can convert to UTF-8 using “nkf -w”:

$ nkf -w --overwrite test.f90   # automatically check the original character code
$ nkf -Sw --overwrite test.f90  # specify the original character code as Shift-JIS
$ nkf -Ew --overwrite test.f90  # specify the original character code as EUC-JP