test_all: 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
/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/jellyfish/bin/test_all - from package: jellyfish-examples

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