tigerdeep: 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/tigerdeep - from package: md5deep

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

On Debian possible default full paths are:

/usr/bin/tigerdeep - from package: md5deep

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

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