pcl_test_search_speed: 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 Debian possible default full paths are:

/usr/bin/pcl_test_search_speed - from package: pcl-tools

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

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