[root@localhost root]# uname -a
Linux localhost.localdomain 2.6.5-1.358smp #1 SMP Sat May 8 09:25:36 EDT 2004 i686 i686 i386 GNU/Linux

[root@localhost root]# rpm -qa | grep redhat
redhat-artwork-0.96-1
redhat-rpm-config-8.0.28-1.1.1
redhat-menus-1.4.1-1
redhat-java-rpm-scripts-1.0.3-2

[root@localhost root]# rpm -qa | grep postgres
postgresql-libs-7.4.2-1
postgresql-7.4.2-1
postgresql-server-7.4.2-1

[root@localhost root]# psql --version
psql (PostgreSQL) 7.4.2
contains support for command-line editing