perl-depends: 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/perl-depends - from package: perl-depends

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

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