wks2ods: 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/wks2ods - from package: wks2ods

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

Error in other languages:
wks2ods: bevel nie gevind nie
wks2ods: comandă negăsită
wks2ods: comando não encontrado
wks2ods: commande introuvable
wks2ods: command not found
wks2ods: käsku ei ole
wks2ods: không tìm thấy lệnh
wks2ods: komanda nerasta
wks2ods: Kommando nicht gefunden.
wks2ods: kommandot finns inte
wks2ods: komut yok
wks2ods: nie znaleziono polecenia
wks2ods: níor aimsíodh an t-ordú
wks2ods: no se encontró la orden
wks2ods: no s'ha trobat l'ordre
wks2ods: opdracht niet gevonden
wks2ods: parancs nem található
wks2ods: perintah tidak ditemukan
wks2ods: príkaz nenájdený
wks2ods: příkaz nenalezen
wks2ods: команда не найдена
wks2ods: командата не е открита
wks2ods: 命令找不到
wks2ods: コマンドが見つかりません