Hi everyone! I try to install ISPConfig last stable on FC4 , installed Postfix, apache, mysql, etc... but it shows error during install- 1) standard 2) expert Your Choice: 2 ########## MAIL SERVER ########## Checking for MTA... ./setup2: line 427: which: command not found ./setup2: line 427: which: command not found ERROR: Your system configuration is not compatible with ISPConfig! The installation routine stops here! Where i was wrong ? Postfix (MTA) already instaled and running... I dont know what to do... Please help.