git-debcherry: 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

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/git-debcherry - from package: gitpkg

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