komkindex: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/komkindex - from package: texlive-lang-korean

You may install the required package with command apt-get install {package}

Error in other languages:
komkindex: bevel nie gevind nie
komkindex: comandă negăsită
komkindex: comando não encontrado
komkindex: commande introuvable
komkindex: command not found
komkindex: käsku ei ole
komkindex: không tìm thấy lệnh
komkindex: komanda nerasta
komkindex: Kommando nicht gefunden.
komkindex: kommandot finns inte
komkindex: komut yok
komkindex: nie znaleziono polecenia
komkindex: níor aimsíodh an t-ordú
komkindex: no se encontró la orden
komkindex: no s'ha trobat l'ordre
komkindex: opdracht niet gevonden
komkindex: parancs nem található
komkindex: perintah tidak ditemukan
komkindex: príkaz nenájdený
komkindex: příkaz nenalezen
komkindex: команда не найдена
komkindex: командата не е открита
komkindex: 命令找不到
komkindex: コマンドが見つかりません