pass: 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/pass - from package: pass

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

On Debian possible default full paths are:

/usr/bin/pass - from package: pass

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

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