wmiir: command not found

Have You tried accessing the binary with the full path?

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/wmiir - from package: wmii

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