dbigcg: 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/dbigcg - from package: emboss

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

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