colplot: 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/bin/colplot - from package: collectl-utils

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

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