gist-paste: 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/gist-paste - from package: gist

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

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