maxima: command not found

Have You tried accessing the binary with the full path?

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/maxima - from package: maxima

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

On Debian possible default full paths are:

/usr/bin/maxima - from package: maxima
/var/lib/wims/public_html/bin/maxima - from package: wims

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