cyr_synclog: 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/lib/cyrus/bin/cyr_synclog - from package: cyrus-replication

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

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