perlpanel-applet-install: 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/perlpanel-applet-install - from package: perlpanel

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

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