tau-config: 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/tau-config - from package: tau
/usr/lib/tau/x86_64/bin/tau-config - from package: tau

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

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