tidyall: 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/tidyall - from package: libcode-tidyall-perl

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

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