warp: 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/lib/cmtk/bin/warp - from package: cmtk
/usr/bin/warp - from package: libghc-wai-app-static-dev

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

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