chage: 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/chage - from package: shadow-utils

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

On Debian possible default full paths are:

/usr/bin/chage - from package: passwd

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

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