um_fsalias: 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/um_fsalias - from package: umview

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

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