fstrace: 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/sbin/fstrace - from package: openafs-client

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