sha1pass: 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/sha1pass - from package: syslinux-perl

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

On Debian possible default full paths are:

/usr/bin/sha1pass - from package: syslinux-utils

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

Error in other languages:
sha1pass: bevel nie gevind nie
sha1pass: comandă negăsită
sha1pass: comando não encontrado
sha1pass: commande introuvable
sha1pass: command not found
sha1pass: käsku ei ole
sha1pass: không tìm thấy lệnh
sha1pass: komanda nerasta
sha1pass: Kommando nicht gefunden.
sha1pass: kommandot finns inte
sha1pass: komut yok
sha1pass: nie znaleziono polecenia
sha1pass: níor aimsíodh an t-ordú
sha1pass: no se encontró la orden
sha1pass: no s'ha trobat l'ordre
sha1pass: opdracht niet gevonden
sha1pass: parancs nem található
sha1pass: perintah tidak ditemukan
sha1pass: príkaz nenájdený
sha1pass: příkaz nenalezen
sha1pass: команда не найдена
sha1pass: командата не е открита
sha1pass: 命令找不到
sha1pass: コマンドが見つかりません