extace: 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/extace - from package: extace

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

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