smixlate: 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/smixlate - from package: libsmi

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

On Debian possible default full paths are:

/usr/bin/smixlate - from package: smitools

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

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