can not edit in pg_ident.conf

edit

You cannot edit this file because this file belongs to user postgres, you didn't have privilege to edit this file.This can be verified by using

ls -l /etc/postgresql/9.1/main/pg_ident.conf

You can edit this file in two ways.

1.Change to user postgres

sudo su - postgres

Then edit the file by

vim /etc/postgresql/9.1/main/pg_ident.conf

2.Use root privilege to edit the file

sudo vim /etc/postgresql/9.1/main/pg_ident.conf

If you didn't have vim installed yet, use

sudo apt-get install vim

Once you enter vim editor, press "i" to become INSERT mode, and you can edit the file. When you finished editing, type ":wq" to save the file and leave vim editor.