GeodSolve: 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/GeodSolve - from package: GeographicLib

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

On Debian possible default full paths are:

/usr/bin/GeodSolve - from package: geographiclib-tools

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

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