wxmaxima: 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/wxmaxima - from package: wxMaxima

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

On Debian possible default full paths are:

/usr/bin/wxmaxima - from package: wxMaxima

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

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