#1 日本語のUTF-8に設定
[hoge@sakura ~]# localectl set-locale LANG=ja_JP.utf8
#2 再読み込みさせて設定を反映
[hoge@sakura ~]# source /etc/locale.conf
1だけでは日本語UTF-8にならない為、このコマンドで設定を有効にします。localectlは有効オプションがない為locale.confを再読み込みする事で反映させます。localectlで設定したロケールは、/etc/locale.confに反映されます。
#3 確認其の1 cat /etc/locale.conf
[hoge@sakura ~]# cat /etc/locale.conf
LANG=ja_JP.utf8
#4 確認其の2 localectl status
[hoge@sakura ~]# localectl status
System Locale: LANG=ja_JP.utf8
VC Keymap: jp106
X11 Layout: jp
#5 確認其の3 locale
[hoge@sakura ~]# locale
LANG=ja_JP.utf8
LC_CTYPE="ja_JP.utf8"
LC_NUMERIC="ja_JP.utf8"
LC_TIME="ja_JP.utf8"
LC_COLLATE="ja_JP.utf8"
LC_MONETARY="ja_JP.utf8"
LC_MESSAGES="ja_JP.utf8"
LC_PAPER="ja_JP.utf8"
LC_NAME="ja_JP.utf8"
LC_ADDRESS="ja_JP.utf8"
LC_TELEPHONE="ja_JP.utf8"
LC_MEASUREMENT="ja_JP.utf8"
LC_IDENTIFICATION="ja_JP.utf8"
LC_ALL=
#6 確認其の4 最終確認として日本語出力の確認
[root@]# hoge
bash: hoge: コマンドが見つかりません
bash: hoge: command not found
Lastly,I had changed the error that I above & keywords Japanese from English including several files like log or txt's content within 2 min..That's it.