sha1deep: 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/sha1deep - from package: md5deep

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

On Debian possible default full paths are:

/usr/bin/sha1deep - from package: md5deep

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

Error in other languages:
sha1deep: bevel nie gevind nie
sha1deep: comandă negăsită
sha1deep: comando não encontrado
sha1deep: commande introuvable
sha1deep: command not found
sha1deep: käsku ei ole
sha1deep: không tìm thấy lệnh
sha1deep: komanda nerasta
sha1deep: Kommando nicht gefunden.
sha1deep: kommandot finns inte
sha1deep: komut yok
sha1deep: nie znaleziono polecenia
sha1deep: níor aimsíodh an t-ordú
sha1deep: no se encontró la orden
sha1deep: no s'ha trobat l'ordre
sha1deep: opdracht niet gevonden
sha1deep: parancs nem található
sha1deep: perintah tidak ditemukan
sha1deep: príkaz nenájdený
sha1deep: příkaz nenalezen
sha1deep: команда не найдена
sha1deep: командата не е открита
sha1deep: 命令找不到
sha1deep: コマンドが見つかりません