> Hi,
>
> to answer to both :
>
> * I 'm not using Fedora but RHEL 5, and no package is available
> including atop or htop
> * Like a server, it runs under level 3 not 5, so I need a command
> line tool

Hi,

atop works from the command line.  I believe you can find a package for RHEL 5 here:

http://rpm.pbone.net/index.php3/stat/4/idpl/15269686/dir/redhat_el_5/com/atop-debuginfo-1.23-8.el5.i386.rpm.html

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