The following packages have unmet dependencies: postgresql-9.0: Depends: libc6 (>= 2.11) but 2.10.1-0ubuntu19 is to be installed Depends: libgssapi-krb5-2 (>= 1.8+dfsg) but 1.7dfsg~beta3- 1ubuntu0.13 is to be installed Depends: libssl0.9.8 (>= 0.9.8k-1) but 0.9.8g-16ubuntu3.5 is to be installed Depends: postgresql-client-9.0 but it is not going to be installed E: Broken packages
Where i can found a documentation about how can i install postgresq 9.0 in Ubuntu 9.10?
The best thing, if possible, is to upgrade Ubuntu. 9.10 is end-of-life so in addition to difficulty installing PostgreSQL, you will be missing important bug-fix and security updates.
And you can always compile from source. However if you don't have all the required software installed to compile from source you may have difficulty updating your system to install anything needed since 9.04 is no longer supported by Ubuntu.