scrollkeeper-preinstall: 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-preinstall - 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-preinstall - from package: rarian-compat

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

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