gramps: 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/gramps - from package: gramps

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

On Debian possible default full paths are:

/usr/bin/gramps - from package: gramps

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

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