git-ftp: command not found

Have You tried accessing the binary with the full path?

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 CentOS possible default full paths are:

/usr/bin/git-ftp - from package: git-ftp

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/git-ftp - from package: git-ftp

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