gdcmdump: 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/gdcmdump - from package: libgdcm-tools

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

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