pedigree: 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/pedigree - from package: texlive-pstricks

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

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