https: 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/https - from package: httpie

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

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