nekotools: 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/nekotools - from package: neko

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

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