ghp-import: 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/ghp-import - from package: ghp-import

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

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