immv: 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/immv - from package: im

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

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