imclean: 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/imclean - from package: im

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

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