you actually asked 2 different questions
this one being the most important i think !!
question #2 = please i need to know if Rhce is useful in Nigeria http://www.redhat.com/training/certifications/rhce/
link talks about RHCE
this answer to question 1 is obvisous
If you are trying to decide on a career move or path then this post would have been better in the Community forum. People would have understood its context better.
As Redhat is a popular version of Linux, if you receive formal training and qualifications with it there may be some good opportunities for you. Try Googling phrases similar to this, "linux jobs in Nigeria", or, "Redhat jobs Nigeria". Alternatively, you could find a local Job Agency (they recruit people for companies in a temporary basis) and ask them what the demand is for people with Redhat/Linux qualifications.
I'm using the line above to try and make the playlists that I export from Banshee compatible with my digital music player. When I run the sed portion of this script I'm trying to remove the portion of the path up to where ...
Here I am with English US keyboard input. But I'd like to install say Norwegian, Polish, Japanese, whatever.
I decide the easiest step. Which is to search "input". "Input Method" sounds promising. I run it.
Then I get window. That says: