pegasus-archive: 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 Debian possible default full paths are:

/usr/bin/pegasus-archive - from package: pegasus-wms

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

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