netwrite: 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/netwrite - from package: netrw

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

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