international-time: 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/international-time - from package: international-time

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

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