wcgrep: 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/wcgrep - from package: kdesdk

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

On Debian possible default full paths are:

/usr/bin/wcgrep - from package: kdesdk-scripts

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

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