xgridedit: 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/xgridedit - from package: xgridedit

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

On Debian possible default full paths are:

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

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

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