antRun: 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/antRun - from package: ant
/usr/share/ant/bin/antRun - from package: ant
/usr/lib64/eclipse/plugins/org.apache.ant_1.7.1.v20100518-1145/bin/antRun - from package: eclipse-platform

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

On Debian possible default full paths are:

/usr/share/ant/bin/antRun - from package: ant
/usr/lib/eclipse/plugins/org.apache.ant_1.8.3.v20120321-1730/bin/antRun - from package: eclipse-platform-data
/usr/share/doc/libcommons-launcher-java/examples/bin/antRun - from package: libcommons-launcher-java

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

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