cvsrevertlast: 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/cvsrevertlast - from package: kdesdk

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

On Debian possible default full paths are:

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

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

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