mouseemu: 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/sbin/mouseemu - from package: mouseemu

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

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