psclip: 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/psclip - from package: GMT

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

On Debian possible default full paths are:

/usr/lib/gmt/bin/psclip - from package: GMT

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

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