bitesize: 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/bitesize - from package: perf-tools-unstable
/usr/bin/bitesize - from package: ubuntu-dev-tools

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

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