expandCols: 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/expandCols - from package: BEDTools

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

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