Open the command prompt, it might be known as Terminal. The following commands will allow you to find your system information.

System Information
archPrint machine architecture.
df Shows disk free space.
duShows disk usage.
freeDisplay used and free memory on the system.
ipcrmProvide information on ipc facilities.
ipcsSame as ipcrm.
lsdevDisplay information about installed hardware via files in the /proc directory.
lsofList open files.
lspciList PCI devices .
pnpdumpLists ISA plug and play devices resource information.
procinfoDisplay system status gathered from proc.
pstreeDisplay a tree of processes.
runlevelFind the current and previous system runlevel.
straceTrace ssytem calls and signals for a binary program.
sttyChange and print terminal line settings.
tloadPrints a graphic representation of the system load average.
ttyPrint the filename of the terminal connected to standard input.
unamePrint system information, Prints Linux.
vmstatReport virtual memory statistics.
xcpustateDisplays CPU states (idle, nice, system, kernel) statistics. Runs in X?

Knowing what distribution you use would be helpful. If you need more help I’d recommend looking at the website of the distribution you use.

If you have kde installed, you can see a lot of info by running kinfocenter.

Open the command prompt, it might be known as Terminal. The following commands will allow you to find your system information.

System Information
archPrint machine architecture.
df Shows disk free space.
duShows disk usage.
freeDisplay used and free memory on the system.
ipcrmProvide information on ipc facilities.
ipcsSame as ipcrm.
lsdevDisplay information about installed hardware via files in the /proc directory.
lsofList open files.
lspciList PCI devices .
pnpdumpLists ISA plug and play devices resource information.
procinfoDisplay system status gathered from proc.
pstreeDisplay a tree of processes.
runlevelFind the current and previous system runlevel.
straceTrace ssytem calls and signals for a binary program.
sttyChange and print terminal line settings.
tloadPrints a graphic representation of the system load average.
ttyPrint the filename of the terminal connected to standard input.
unamePrint system information, Prints Linux.
vmstatReport virtual memory statistics.
xcpustateDisplays CPU states (idle, nice, system, kernel) statistics. Runs in X?

Knowing what distribution you use would be helpful. If you need more help I’d recommend looking at the website of the distribution you use.

If you have kde installed, you can see a lot of info by running kinfocenter.