syrep: 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/syrep - from package: syrep

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

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