dimfilter: 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/bin/dimfilter - from package: GMT

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

On Debian possible default full paths are:

/usr/lib/gmt/bin/dimfilter - from package: GMT

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

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