server-interrupt: 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/lib/wims/bin/server-interrupt - from package: wims

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

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