get-versions: 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/get-versions - from package: gpm

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

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