crc-gentab: 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/crc-gentab - from package: libbg1-dev

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

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