red hat enterprise

How do I add route (router IP 192.168.1.254) to my Centos Linux systems from the command line?

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Can you explains the basic difference between CentOS and RHEL?

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I am on Red Hat Enterprise Linux 5.x server. Is there is an easy way to run script or command at boot time after fresh reboot command?

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How can I use yum to download source packages instead of manually downloading every single package from RHN / CentOS / RedHat Ftp website?

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Q.I’m using MySQL 5 under Red Hat Enterprise Linux 5. How do I change default mysql server port (tcp port 3306) under Linux or UNIX operating systems?

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How do I enable EPEL (Extra Packages for Enterprise Linux) repo and install the packages under RHEL / CentOS Linux server systems?

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Q. I’ve installed Postgresql under Red Hat Enterprise Linux 5.x server. I’ve created username / password and database. But when I try to connect it via PHP or psql using following syntax:

psql -d myDb -U username -W

It gives me an error that read as follows:

psql: FATAL: Ident authentication failed for user “username”

How do I fix this error?

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