scrollkeeper-update: 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 CentOS possible default full paths are:

/usr/bin/scrollkeeper-update - from package: rarian-compat

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/scrollkeeper-update - from package: rarian-compat

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

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