gnome-activity-journal: 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/gnome-activity-journal - from package: gnome-activity-journal

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

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