dtomcat: 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:

/usr/sbin/dtomcat - from package: tomcat

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

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