rsyslogd: 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:

/sbin/rsyslogd - from package: rsyslog7
/sbin/rsyslogd - from package: rsyslog

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/sbin/rsyslogd - from package: rsyslog

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

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