gcin: 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/gcin - from package: gcin

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

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