clm: 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/clm - from package: clean

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

On Debian possible default full paths are:

/usr/bin/clm - from package: mcl

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

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