msgcleanup: 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/msgcleanup - from package: ax25mail-utils

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

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