m17n-db: 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 CentOS possible default full paths are:

/usr/bin/m17n-db - from package: m17n-db-devel

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/m17n-db - from package: m17n-db

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

Error in other languages:
m17n-db: bevel nie gevind nie
m17n-db: comandă negăsită
m17n-db: comando não encontrado
m17n-db: commande introuvable
m17n-db: command not found
m17n-db: käsku ei ole
m17n-db: không tìm thấy lệnh
m17n-db: komanda nerasta
m17n-db: Kommando nicht gefunden.
m17n-db: kommandot finns inte
m17n-db: komut yok
m17n-db: nie znaleziono polecenia
m17n-db: níor aimsíodh an t-ordú
m17n-db: no se encontró la orden
m17n-db: no s'ha trobat l'ordre
m17n-db: opdracht niet gevonden
m17n-db: parancs nem található
m17n-db: perintah tidak ditemukan
m17n-db: príkaz nenájdený
m17n-db: příkaz nenalezen
m17n-db: команда не найдена
m17n-db: командата не е открита
m17n-db: 命令找不到
m17n-db: コマンドが見つかりません