perl5i: command not found

Have You tried accessing the binary with the full path?

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/perl5i - from package: libperl5i-perl

You may install the required package with command apt-get install {package}
Error in other languages:
perl5i: bevel nie gevind nie
perl5i: comandă negăsită
perl5i: comando não encontrado
perl5i: commande introuvable
perl5i: command not found
perl5i: käsku ei ole
perl5i: không tìm thấy lệnh
perl5i: komanda nerasta
perl5i: Kommando nicht gefunden.
perl5i: kommandot finns inte
perl5i: komut yok
perl5i: nie znaleziono polecenia
perl5i: níor aimsíodh an t-ordú
perl5i: no se encontró la orden
perl5i: no s'ha trobat l'ordre
perl5i: opdracht niet gevonden
perl5i: parancs nem található
perl5i: perintah tidak ditemukan
perl5i: príkaz nenájdený
perl5i: příkaz nenalezen
perl5i: команда не найдена
perl5i: командата не е открита
perl5i: 命令找不到
perl5i: コマンドが見つかりません