mikutter: 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/mikutter - from package: mikutter

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

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