Without getting too carried away, there are a number of handy commands that will tell you certain attributes regarding the current state of your system (admittedly, some of them are Red Hat-specific). Some of this information is definitely handy if you have to get help troubleshooting over the phone, for example.
$ who who's logged in? $ hostname print the host name $ arch print the architecture> $ cat /etc/redhat-release print current (Red Hat) OS release $ uname -a print various system info $ cat /proc/version print kernel version
Even if you can't appreciate some of the above just yet, remember how to get this information. Guaranteed, it will come in handy at some point.
 | Tip |
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The uname command comes with a number of options for seeing much more specific system information, such as: $ uname -n nodename $ uname -m machine hardware name $ uname -p processor type $ uname -i hardware platform $ uname -o operating system $ uname -s kernel name $ uname -r kernel release $ uname -v kernel version $ uname -a all of the above To see all of the possible options for uname, check its man page. | |