listgeo: 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/listgeo - from package: libgeotiff

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

On Debian possible default full paths are:

/usr/bin/listgeo - from package: geotiff-bin

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

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