nitpic: 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/nitpic - from package: nitpic

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

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