pxsearch: 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/lib/cmtk/bin/pxsearch - from package: cmtk

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

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