svnrevertlast: 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/svnrevertlast - from package: kdesdk

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

On Debian possible default full paths are:

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

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

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