paste: 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/paste - from package: coreutils

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

On Debian possible default full paths are:

/usr/bin/paste - from package: coreutils

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

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