md5deep: 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/md5deep - from package: md5deep

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

On Debian possible default full paths are:

/usr/bin/md5deep - from package: md5deep

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

Error in other languages:
md5deep: bevel nie gevind nie
md5deep: comandă negăsită
md5deep: comando não encontrado
md5deep: commande introuvable
md5deep: command not found
md5deep: käsku ei ole
md5deep: không tìm thấy lệnh
md5deep: komanda nerasta
md5deep: Kommando nicht gefunden.
md5deep: kommandot finns inte
md5deep: komut yok
md5deep: nie znaleziono polecenia
md5deep: níor aimsíodh an t-ordú
md5deep: no se encontró la orden
md5deep: no s'ha trobat l'ordre
md5deep: opdracht niet gevonden
md5deep: parancs nem található
md5deep: perintah tidak ditemukan
md5deep: príkaz nenájdený
md5deep: příkaz nenalezen
md5deep: команда не найдена
md5deep: командата не е открита
md5deep: 命令找不到
md5deep: コマンドが見つかりません