nedit-client: 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/nedit-client - from package: nedit

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

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