gdalimport.py: 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/gdalimport.py - from package: gdal-python

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

On Debian possible default full paths are:

/usr/bin/gdalimport.py - from package: python-gdal

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

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