wxpaste: 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/wxpaste - from package: WindowMaker

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

On Debian possible default full paths are:

/usr/bin/wxpaste - from package: wmaker

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

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