picolisp: 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/picolisp - from package: picolisp

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

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