clipit: 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/clipit - from package: clipit

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

On Debian possible default full paths are:

/usr/bin/clipit - from package: clipit

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

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