s3qlrm: 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/s3qlrm - from package: s3ql

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

Error in other languages:
s3qlrm: bevel nie gevind nie
s3qlrm: comandă negăsită
s3qlrm: comando não encontrado
s3qlrm: commande introuvable
s3qlrm: command not found
s3qlrm: käsku ei ole
s3qlrm: không tìm thấy lệnh
s3qlrm: komanda nerasta
s3qlrm: Kommando nicht gefunden.
s3qlrm: kommandot finns inte
s3qlrm: komut yok
s3qlrm: nie znaleziono polecenia
s3qlrm: níor aimsíodh an t-ordú
s3qlrm: no se encontró la orden
s3qlrm: no s'ha trobat l'ordre
s3qlrm: opdracht niet gevonden
s3qlrm: parancs nem található
s3qlrm: perintah tidak ditemukan
s3qlrm: príkaz nenájdený
s3qlrm: příkaz nenalezen
s3qlrm: команда не найдена
s3qlrm: командата не е открита
s3qlrm: 命令找不到
s3qlrm: コマンドが見つかりません